ches: 2 [ 113.056146][ T6181] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 113.061352][ T6181] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 113.109136][ T6182] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 113.110603][ T6182] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 113.117072][ T6182] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 113.132512][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 113.133618][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 113.185377][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 51ms [ 113.190447][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 113.191372][ T6182] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 113.196402][ T6182] syz.3.328 (6182): drop_caches: 2 [ 113.207070][ T6181] syz.2.329 (6181): drop_caches: 2 [ 113.234167][ T6184] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 113.235620][ T6184] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 113.238981][ T6184] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms 1970/01/01 00:01:53 executed programs: 327 [ 113.253747][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 113.254890][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 113.293500][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 113.295789][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 113.296646][ T6184] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 113.302132][ T6184] syz.0.330 (6184): drop_caches: 2 [ 113.320677][ T6186] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 113.321908][ T6186] CPU: 0 PID: 6186 Comm: syz.1.331 Not tainted syzkaller #0 [ 113.323078][ T6186] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 113.324840][ T6186] Call trace: [ 113.325354][ T6186] dump_backtrace+0x0/0x458 [ 113.326030][ T6186] show_stack+0x2c/0x3c [ 113.326731][ T6186] __dump_stack+0x30/0x40 [ 113.327457][ T6186] dump_stack_lvl+0xf4/0x15c [ 113.328285][ T6186] dump_stack+0x1c/0x5c [ 113.329013][ T6186] sysfs_create_dir_ns+0x244/0x264 [ 113.329895][ T6186] kobject_add_internal+0x5ac/0xc3c [ 113.330715][ T6186] kobject_init_and_add+0x124/0x190 [ 113.331672][ T6186] gfs2_sys_fs_add+0x200/0x41c [ 113.332464][ T6186] gfs2_fill_super+0xddc/0x1a18 [ 113.333270][ T6186] get_tree_bdev+0x358/0x544 [ 113.334032][ T6186] gfs2_get_tree+0x54/0x1b4 [ 113.334786][ T6186] vfs_get_tree+0x90/0x274 [ 113.335552][ T6186] do_new_mount+0x228/0x810 [ 113.336334][ T6186] path_mount+0x5bc/0x1008 [ 113.337029][ T6186] __arm64_sys_mount+0x514/0x5f0 [ 113.337817][ T6186] invoke_syscall+0x98/0x2b0 [ 113.338585][ T6186] el0_svc_common+0x138/0x258 [ 113.339337][ T6186] do_el0_svc+0x58/0x13c [ 113.339945][ T6186] el0_svc+0x78/0x1d0 [ 113.340567][ T6186] el0t_64_sync_handler+0xcc/0xe4 [ 113.341381][ T6186] el0t_64_sync+0x1a0/0x1a4 [ 113.377473][ T6186] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 113.379452][ T6186] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 113.494737][ T6186] syz.1.331 (6186): drop_caches: 2 [ 113.542637][ T6192] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 113.544078][ T6192] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 113.547116][ T6192] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 113.564649][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 113.565865][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 113.621471][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 55ms [ 113.623751][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 113.624546][ T6192] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 113.628869][ T6192] syz.2.334 (6192): drop_caches: 2 [ 113.689871][ T6188] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 113.691206][ T6188] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 113.692649][ T6190] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 113.693842][ T6190] CPU: 0 PID: 6190 Comm: syz.3.333 Not tainted syzkaller #0 [ 113.695098][ T6190] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 113.696733][ T6190] Call trace: [ 113.697291][ T6190] dump_backtrace+0x0/0x458 [ 113.698054][ T6190] show_stack+0x2c/0x3c [ 113.698749][ T6190] __dump_stack+0x30/0x40 [ 113.699488][ T6190] dump_stack_lvl+0xf4/0x15c [ 113.700196][ T6190] dump_stack+0x1c/0x5c [ 113.700884][ T6190] sysfs_create_dir_ns+0x244/0x264 [ 113.701703][ T6190] kobject_add_internal+0x5ac/0xc3c [ 113.702556][ T6190] kobject_init_and_add+0x124/0x190 [ 113.703385][ T6190] gfs2_sys_fs_add+0x200/0x41c [ 113.704140][ T6190] gfs2_fill_super+0xddc/0x1a18 [ 113.704908][ T6190] get_tree_bdev+0x358/0x544 [ 113.705659][ T6190] gfs2_get_tree+0x54/0x1b4 [ 113.706305][ T6190] vfs_get_tree+0x90/0x274 [ 113.707040][ T6190] do_new_mount+0x228/0x810 [ 113.707729][ T6190] path_mount+0x5bc/0x1008 [ 113.708381][ T6190] __arm64_sys_mount+0x514/0x5f0 [ 113.709067][ T6190] invoke_syscall+0x98/0x2b0 [ 113.709763][ T6190] el0_svc_common+0x138/0x258 [ 113.710538][ T6190] do_el0_svc+0x58/0x13c [ 113.711170][ T6190] el0_svc+0x78/0x1d0 [ 113.711793][ T6190] el0t_64_sync_handler+0xcc/0xe4 [ 113.712624][ T6190] el0t_64_sync+0x1a0/0x1a4 [ 113.726723][ T6188] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 113.731575][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 113.732650][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 113.760521][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 27ms [ 113.761827][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 113.762676][ T6188] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 113.767159][ T6188] syz.4.332 (6188): drop_caches: 2 [ 113.780567][ T6190] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 113.782816][ T6190] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 113.806873][ T6190] syz.3.333 (6190): drop_caches: 2 [ 113.910944][ T6194] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 113.912141][ T6194] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 113.914797][ T6194] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 113.927641][ T6196] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 113.928860][ T6196] CPU: 0 PID: 6196 Comm: syz.1.336 Not tainted syzkaller #0 [ 113.930071][ T6196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 113.931739][ T6196] Call trace: [ 113.932300][ T6196] dump_backtrace+0x0/0x458 [ 113.933065][ T6196] show_stack+0x2c/0x3c [ 113.933323][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 113.933791][ T6196] __dump_stack+0x30/0x40 [ 113.934904][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 113.935620][ T6196] dump_stack_lvl+0xf4/0x15c [ 113.937415][ T6196] dump_stack+0x1c/0x5c [ 113.938061][ T6196] sysfs_create_dir_ns+0x244/0x264 [ 113.938894][ T6196] kobject_add_internal+0x5ac/0xc3c [ 113.939727][ T6196] kobject_init_and_add+0x124/0x190 [ 113.940615][ T6196] gfs2_sys_fs_add+0x200/0x41c [ 113.941469][ T6196] gfs2_fill_super+0xddc/0x1a18 [ 113.942301][ T6196] get_tree_bdev+0x358/0x544 [ 113.943040][ T6196] gfs2_get_tree+0x54/0x1b4 [ 113.943812][ T6196] vfs_get_tree+0x90/0x274 [ 113.944481][ T6196] do_new_mount+0x228/0x810 [ 113.945214][ T6196] path_mount+0x5bc/0x1008 [ 113.945953][ T6196] __arm64_sys_mount+0x514/0x5f0 [ 113.946752][ T6196] invoke_syscall+0x98/0x2b0 [ 113.947486][ T6196] el0_svc_common+0x138/0x258 [ 113.948310][ T6196] do_el0_svc+0x58/0x13c [ 113.949047][ T6196] el0_svc+0x78/0x1d0 [ 113.949704][ T6196] el0t_64_sync_handler+0xcc/0xe4 [ 113.950561][ T6196] el0t_64_sync+0x1a0/0x1a4 [ 113.984753][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 113.986003][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 113.986895][ T6194] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 113.992622][ T6194] syz.0.335 (6194): drop_caches: 2 [ 114.037493][ T6196] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 114.039656][ T6196] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 114.042394][ T6196] syz.1.336 (6196): drop_caches: 2 [ 114.051862][ T6198] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.053197][ T6198] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 114.056291][ T6198] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 114.066682][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.067799][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.124003][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 56ms [ 114.125398][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.126246][ T6198] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 114.132808][ T6198] syz.2.337 (6198): drop_caches: 2 [ 114.217858][ T6200] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.219113][ T6200] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 114.231323][ T6200] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 114.247490][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.248603][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.285880][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 37ms [ 114.287558][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.290300][ T6200] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 114.298992][ T6200] syz.3.339 (6200): drop_caches: 2 [ 114.499448][ T6202] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.500808][ T6202] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 114.504017][ T6202] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 114.508162][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.509204][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.547524][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 114.557509][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.558261][ T6202] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 114.563369][ T6202] syz.4.338 (6202): drop_caches: 2 [ 114.578374][ T6204] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 114.579511][ T6204] CPU: 0 PID: 6204 Comm: syz.1.341 Not tainted syzkaller #0 [ 114.580752][ T6204] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 114.582523][ T6204] Call trace: [ 114.583040][ T6204] dump_backtrace+0x0/0x458 [ 114.583752][ T6204] show_stack+0x2c/0x3c [ 114.584463][ T6204] __dump_stack+0x30/0x40 [ 114.585249][ T6204] dump_stack_lvl+0xf4/0x15c [ 114.586026][ T6204] dump_stack+0x1c/0x5c [ 114.586779][ T6204] sysfs_create_dir_ns+0x244/0x264 [ 114.587656][ T6204] kobject_add_internal+0x5ac/0xc3c [ 114.588492][ T6204] kobject_init_and_add+0x124/0x190 [ 114.589291][ T6204] gfs2_sys_fs_add+0x200/0x41c [ 114.589960][ T6204] gfs2_fill_super+0xddc/0x1a18 [ 114.590659][ T6204] get_tree_bdev+0x358/0x544 [ 114.591362][ T6204] gfs2_get_tree+0x54/0x1b4 [ 114.592025][ T6204] vfs_get_tree+0x90/0x274 [ 114.592705][ T6204] do_new_mount+0x228/0x810 [ 114.593380][ T6204] path_mount+0x5bc/0x1008 [ 114.594022][ T6204] __arm64_sys_mount+0x514/0x5f0 [ 114.594741][ T6204] invoke_syscall+0x98/0x2b0 [ 114.595461][ T6204] el0_svc_common+0x138/0x258 [ 114.596198][ T6204] do_el0_svc+0x58/0x13c [ 114.596808][ T6204] el0_svc+0x78/0x1d0 [ 114.597461][ T6204] el0t_64_sync_handler+0xcc/0xe4 [ 114.598231][ T6204] el0t_64_sync+0x1a0/0x1a4 [ 114.614148][ T6204] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 114.616340][ T6208] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 114.617690][ T6208] CPU: 0 PID: 6208 Comm: syz.2.342 Not tainted syzkaller #0 [ 114.618871][ T6208] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 114.620404][ T6208] Call trace: [ 114.620884][ T6208] dump_backtrace+0x0/0x458 [ 114.621551][ T6208] show_stack+0x2c/0x3c [ 114.622160][ T6208] __dump_stack+0x30/0x40 [ 114.622825][ T6208] dump_stack_lvl+0xf4/0x15c [ 114.623518][ T6208] dump_stack+0x1c/0x5c [ 114.624187][ T6208] sysfs_create_dir_ns+0x244/0x264 [ 114.625001][ T6208] kobject_add_internal+0x5ac/0xc3c [ 114.625799][ T6208] kobject_init_and_add+0x124/0x190 [ 114.626616][ T6208] gfs2_sys_fs_add+0x200/0x41c [ 114.627443][ T6208] gfs2_fill_super+0xddc/0x1a18 [ 114.628273][ T6208] get_tree_bdev+0x358/0x544 [ 114.629030][ T6208] gfs2_get_tree+0x54/0x1b4 [ 114.629782][ T6208] vfs_get_tree+0x90/0x274 [ 114.630499][ T6208] do_new_mount+0x228/0x810 [ 114.631226][ T6208] path_mount+0x5bc/0x1008 [ 114.631969][ T6208] __arm64_sys_mount+0x514/0x5f0 [ 114.632812][ T6208] invoke_syscall+0x98/0x2b0 [ 114.633523][ T6208] el0_svc_common+0x138/0x258 [ 114.634292][ T6208] do_el0_svc+0x58/0x13c [ 114.635001][ T6208] el0_svc+0x78/0x1d0 [ 114.635609][ T6208] el0t_64_sync_handler+0xcc/0xe4 [ 114.636502][ T6208] el0t_64_sync+0x1a0/0x1a4 [ 114.638834][ T6204] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 114.640663][ T6204] syz.1.341 (6204): drop_caches: 2 [ 114.657727][ T6208] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 114.660091][ T6208] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 114.665763][ T6208] syz.2.342 (6208): drop_caches: 2 [ 114.691762][ T6206] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.693096][ T6206] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 114.696396][ T6206] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 114.716593][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.717804][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.751601][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 33ms [ 114.753074][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.753967][ T6206] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 114.762094][ T6206] syz.0.340 (6206): drop_caches: 2 [ 114.845251][ T6210] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.846599][ T6210] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 114.849913][ T6210] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 114.853567][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.854632][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.884341][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 29ms [ 114.885662][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.886594][ T6210] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 114.890545][ T6210] syz.3.343 (6210): drop_caches: 2 [ 115.138920][ T6214] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 115.140400][ T6214] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 115.143196][ T6214] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 115.152077][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 115.153150][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 115.194291][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 115.195554][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 115.196458][ T6214] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 115.198865][ T6212] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 115.199998][ T6212] CPU: 1 PID: 6212 Comm: syz.1.345 Not tainted syzkaller #0 [ 115.201208][ T6212] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 115.202888][ T6212] Call trace: [ 115.203470][ T6212] dump_backtrace+0x0/0x458 [ 115.204204][ T6212] show_stack+0x2c/0x3c [ 115.204884][ T6212] __dump_stack+0x30/0x40 [ 115.205639][ T6212] dump_stack_lvl+0xf4/0x15c [ 115.206434][ T6212] dump_stack+0x1c/0x5c [ 115.207114][ T6212] sysfs_create_dir_ns+0x244/0x264 [ 115.208010][ T6212] kobject_add_internal+0x5ac/0xc3c [ 115.208874][ T6212] kobject_init_and_add+0x124/0x190 [ 115.209795][ T6212] gfs2_sys_fs_add+0x200/0x41c [ 115.210590][ T6212] gfs2_fill_super+0xddc/0x1a18 [ 115.211459][ T6212] get_tree_bdev+0x358/0x544 [ 115.212193][ T6212] gfs2_get_tree+0x54/0x1b4 [ 115.212962][ T6212] vfs_get_tree+0x90/0x274 [ 115.213738][ T6212] do_new_mount+0x228/0x810 [ 115.214520][ T6212] path_mount+0x5bc/0x1008 [ 115.215225][ T6212] __arm64_sys_mount+0x514/0x5f0 [ 115.216079][ T6212] invoke_syscall+0x98/0x2b0 [ 115.216851][ T6212] el0_svc_common+0x138/0x258 [ 115.217686][ T6212] do_el0_svc+0x58/0x13c [ 115.218411][ T6212] el0_svc+0x78/0x1d0 [ 115.219042][ T6212] el0t_64_sync_handler+0xcc/0xe4 [ 115.219892][ T6212] el0t_64_sync+0x1a0/0x1a4 [ 115.228710][ T6214] syz.4.344 (6214): drop_caches: 2 [ 115.270976][ T6216] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 115.272161][ T6216] CPU: 0 PID: 6216 Comm: syz.2.346 Not tainted syzkaller #0 [ 115.273267][ T6216] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 115.274810][ T6216] Call trace: [ 115.275347][ T6216] dump_backtrace+0x0/0x458 [ 115.276061][ T6216] show_stack+0x2c/0x3c [ 115.276703][ T6216] __dump_stack+0x30/0x40 [ 115.277411][ T6216] dump_stack_lvl+0xf4/0x15c [ 115.278234][ T6216] dump_stack+0x1c/0x5c [ 115.278924][ T6216] sysfs_create_dir_ns+0x244/0x264 [ 115.279053][ T6212] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 115.279819][ T6216] kobject_add_internal+0x5ac/0xc3c [ 115.282054][ T6212] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 115.282846][ T6216] kobject_init_and_add+0x124/0x190 [ 115.284754][ T6216] gfs2_sys_fs_add+0x200/0x41c [ 115.285414][ T6216] gfs2_fill_super+0xddc/0x1a18 [ 115.286278][ T6216] get_tree_bdev+0x358/0x544 [ 115.287112][ T6216] gfs2_get_tree+0x54/0x1b4 [ 115.287872][ T6216] vfs_get_tree+0x90/0x274 [ 115.288644][ T6216] do_new_mount+0x228/0x810 [ 115.289412][ T6216] path_mount+0x5bc/0x1008 [ 115.290199][ T6216] __arm64_sys_mount+0x514/0x5f0 [ 115.291008][ T6216] invoke_syscall+0x98/0x2b0 [ 115.291715][ T6216] el0_svc_common+0x138/0x258 [ 115.292468][ T6216] do_el0_svc+0x58/0x13c [ 115.293239][ T6216] el0_svc+0x78/0x1d0 [ 115.293720][ T6220] syz.3.348 (6220): drop_caches: 2 [ 115.293903][ T6216] el0t_64_sync_handler+0xcc/0xe4 [ 115.295528][ T6216] el0t_64_sync+0x1a0/0x1a4 [ 115.299928][ T6218] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 115.300188][ T6216] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 115.301269][ T6218] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 115.303354][ T6216] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 115.310378][ T6218] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 115.312133][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 115.313231][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 115.350132][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 36ms [ 115.351445][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 115.352389][ T6218] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 115.357129][ T6218] syz.0.347 (6218): drop_caches: 2 [ 115.421008][ T6212] syz.1.345 (6212): drop_caches: 2 [ 115.423837][ T6216] syz.2.346 (6216): drop_caches: 2 [ 115.744348][ T6222] set_capacity_and_notify: 29 callbacks suppressed [ 115.744358][ T6222] loop3: detected capacity change from 0 to 32768 [ 115.757831][ T6222] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 115.759243][ T6222] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 115.778906][ T6222] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 115.784816][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 115.785870][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 115.824070][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 115.825429][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 115.826325][ T6222] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 115.832531][ T6222] syz.3.350 (6222): drop_caches: 2 [ 115.840161][ T6224] loop4: detected capacity change from 0 to 32768 [ 115.858749][ T6226] loop1: detected capacity change from 0 to 32768 [ 115.883949][ T6224] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 115.885142][ T6224] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 115.893275][ T6224] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 115.896755][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 115.897984][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 115.915960][ T6226] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 115.917243][ T6226] CPU: 0 PID: 6226 Comm: syz.1.352 Not tainted syzkaller #0 [ 115.918468][ T6226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 115.920186][ T6226] Call trace: [ 115.920734][ T6226] dump_backtrace+0x0/0x458 [ 115.921463][ T6226] show_stack+0x2c/0x3c [ 115.922140][ T6226] __dump_stack+0x30/0x40 [ 115.922836][ T6226] dump_stack_lvl+0xf4/0x15c [ 115.923620][ T6226] dump_stack+0x1c/0x5c [ 115.924266][ T6226] sysfs_create_dir_ns+0x244/0x264 [ 115.925172][ T6226] kobject_add_internal+0x5ac/0xc3c [ 115.926016][ T6226] kobject_init_and_add+0x124/0x190 [ 115.926811][ T6226] gfs2_sys_fs_add+0x200/0x41c [ 115.927544][ T6226] gfs2_fill_super+0xddc/0x1a18 [ 115.928438][ T6226] get_tree_bdev+0x358/0x544 [ 115.929199][ T6226] gfs2_get_tree+0x54/0x1b4 [ 115.929953][ T6226] vfs_get_tree+0x90/0x274 [ 115.930681][ T6226] do_new_mount+0x228/0x810 [ 115.931431][ T6226] path_mount+0x5bc/0x1008 [ 115.932193][ T6226] __arm64_sys_mount+0x514/0x5f0 [ 115.933037][ T6226] invoke_syscall+0x98/0x2b0 [ 115.933803][ T6226] el0_svc_common+0x138/0x258 [ 115.934601][ T6226] do_el0_svc+0x58/0x13c [ 115.935311][ T6226] el0_svc+0x78/0x1d0 [ 115.935996][ T6226] el0t_64_sync_handler+0xcc/0xe4 [ 115.936853][ T6226] el0t_64_sync+0x1a0/0x1a4 [ 115.946331][ T6228] loop0: detected capacity change from 0 to 32768 [ 115.946349][ T6230] loop2: detected capacity change from 0 to 32768 [ 115.950976][ T6230] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 115.952275][ T6230] CPU: 1 PID: 6230 Comm: syz.2.353 Not tainted syzkaller #0 [ 115.953453][ T6230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 115.954832][ T6230] Call trace: [ 115.955349][ T6230] dump_backtrace+0x0/0x458 [ 115.956021][ T6230] show_stack+0x2c/0x3c [ 115.956652][ T6230] __dump_stack+0x30/0x40 [ 115.957282][ T6230] dump_stack_lvl+0xf4/0x15c [ 115.957753][ T6226] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 115.957956][ T6230] dump_stack+0x1c/0x5c [ 115.959978][ T6226] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 115.960652][ T6230] sysfs_create_dir_ns+0x244/0x264 [ 115.962551][ T6230] kobject_add_internal+0x5ac/0xc3c [ 115.963484][ T6230] kobject_init_and_add+0x124/0x190 [ 115.963701][ T6226] syz.1.352 (6226): drop_caches: 2 [ 115.964371][ T6230] gfs2_sys_fs_add+0x200/0x41c [ 115.965921][ T6230] gfs2_fill_super+0xddc/0x1a18 [ 115.966747][ T6230] get_tree_bdev+0x358/0x544 [ 115.967580][ T6230] gfs2_get_tree+0x54/0x1b4 [ 115.968352][ T6230] vfs_get_tree+0x90/0x274 [ 115.969079][ T6230] do_new_mount+0x228/0x810 [ 115.969841][ T6230] path_mount+0x5bc/0x1008 [ 115.970535][ T6230] __arm64_sys_mount+0x514/0x5f0 [ 115.971353][ T6230] invoke_syscall+0x98/0x2b0 [ 115.972123][ T6230] el0_svc_common+0x138/0x258 [ 115.972877][ T6230] do_el0_svc+0x58/0x13c [ 115.973583][ T6230] el0_svc+0x78/0x1d0 [ 115.974233][ T6230] el0t_64_sync_handler+0xcc/0xe4 [ 115.975065][ T6230] el0t_64_sync+0x1a0/0x1a4 [ 115.981262][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 83ms [ 115.982624][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 115.983588][ T6224] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 115.985505][ T6228] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 115.986577][ T6228] CPU: 0 PID: 6228 Comm: syz.0.351 Not tainted syzkaller #0 [ 115.987792][ T6228] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 115.989374][ T6228] Call trace: [ 115.989942][ T6228] dump_backtrace+0x0/0x458 [ 115.990707][ T6228] show_stack+0x2c/0x3c [ 115.991414][ T6228] __dump_stack+0x30/0x40 [ 115.992152][ T6228] dump_stack_lvl+0xf4/0x15c [ 115.992931][ T6228] dump_stack+0x1c/0x5c [ 115.993591][ T6228] sysfs_create_dir_ns+0x244/0x264 [ 115.994450][ T6228] kobject_add_internal+0x5ac/0xc3c [ 115.995357][ T6228] kobject_init_and_add+0x124/0x190 [ 115.996241][ T6228] gfs2_sys_fs_add+0x200/0x41c [ 115.997043][ T6228] gfs2_fill_super+0xddc/0x1a18 [ 115.997929][ T6228] get_tree_bdev+0x358/0x544 [ 115.998666][ T6228] gfs2_get_tree+0x54/0x1b4 [ 115.999406][ T6228] vfs_get_tree+0x90/0x274 [ 116.000132][ T6228] do_new_mount+0x228/0x810 [ 116.000927][ T6228] path_mount+0x5bc/0x1008 [ 116.001662][ T6228] __arm64_sys_mount+0x514/0x5f0 [ 116.002492][ T6228] invoke_syscall+0x98/0x2b0 [ 116.003304][ T6228] el0_svc_common+0x138/0x258 [ 116.004114][ T6228] do_el0_svc+0x58/0x13c [ 116.004807][ T6228] el0_svc+0x78/0x1d0 [ 116.005431][ T6228] el0t_64_sync_handler+0xcc/0xe4 [ 116.006236][ T6228] el0t_64_sync+0x1a0/0x1a4 [ 116.007482][ T6230] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 116.009922][ T6230] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 116.011851][ T6230] syz.2.353 (6230): drop_caches: 2 [ 116.018101][ T6224] syz.4.349 (6224): drop_caches: 2 [ 116.027603][ T6228] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 116.029695][ T6228] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 116.047913][ T6228] syz.0.351 (6228): drop_caches: 2 [ 116.194453][ T6232] syz.3.354 (6232): drop_caches: 2 [ 116.411463][ T6234] loop1: detected capacity change from 0 to 32768 [ 116.452060][ T6234] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 116.453423][ T6234] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 116.456111][ T6234] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 116.461743][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 116.462841][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 116.487069][ T6237] loop0: detected capacity change from 0 to 32768 [ 116.497099][ T6240] loop4: detected capacity change from 0 to 32768 [ 116.504655][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 116.510350][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 116.512789][ T6234] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 116.517298][ T6234] syz.1.355 (6234): drop_caches: 2 [ 116.519864][ T6240] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 116.521136][ T6240] CPU: 0 PID: 6240 Comm: syz.4.357 Not tainted syzkaller #0 [ 116.522431][ T6240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 116.524009][ T6240] Call trace: [ 116.524564][ T6240] dump_backtrace+0x0/0x458 [ 116.525355][ T6240] show_stack+0x2c/0x3c [ 116.526037][ T6240] __dump_stack+0x30/0x40 [ 116.526777][ T6240] dump_stack_lvl+0xf4/0x15c [ 116.527471][ T6240] dump_stack+0x1c/0x5c [ 116.528151][ T6240] sysfs_create_dir_ns+0x244/0x264 [ 116.528993][ T6240] kobject_add_internal+0x5ac/0xc3c [ 116.529904][ T6240] kobject_init_and_add+0x124/0x190 [ 116.530793][ T6240] gfs2_sys_fs_add+0x200/0x41c [ 116.531604][ T6240] gfs2_fill_super+0xddc/0x1a18 [ 116.532403][ T6240] get_tree_bdev+0x358/0x544 [ 116.533165][ T6240] gfs2_get_tree+0x54/0x1b4 [ 116.533876][ T6240] vfs_get_tree+0x90/0x274 [ 116.534610][ T6240] do_new_mount+0x228/0x810 [ 116.535362][ T6240] path_mount+0x5bc/0x1008 [ 116.536164][ T6240] __arm64_sys_mount+0x514/0x5f0 [ 116.536991][ T6240] invoke_syscall+0x98/0x2b0 [ 116.537819][ T6240] el0_svc_common+0x138/0x258 [ 116.538627][ T6240] do_el0_svc+0x58/0x13c [ 116.539342][ T6240] el0_svc+0x78/0x1d0 [ 116.540028][ T6240] el0t_64_sync_handler+0xcc/0xe4 [ 116.540813][ T6240] el0t_64_sync+0x1a0/0x1a4 [ 116.554673][ T6238] loop2: detected capacity change from 0 to 32768 [ 116.555859][ T6240] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 116.572962][ T6238] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 116.574263][ T6238] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 116.577041][ T6238] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 116.579046][ T6240] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 116.581672][ T6240] syz.4.357 (6240): drop_caches: 2 [ 116.582888][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 116.584018][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 116.597744][ T6237] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 116.598851][ T6237] CPU: 0 PID: 6237 Comm: syz.0.358 Not tainted syzkaller #0 [ 116.599965][ T6237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 116.601620][ T6237] Call trace: [ 116.602112][ T6237] dump_backtrace+0x0/0x458 [ 116.602821][ T6237] show_stack+0x2c/0x3c [ 116.603455][ T6237] __dump_stack+0x30/0x40 [ 116.604178][ T6237] dump_stack_lvl+0xf4/0x15c [ 116.604883][ T6237] dump_stack+0x1c/0x5c [ 116.605481][ T6237] sysfs_create_dir_ns+0x244/0x264 [ 116.606259][ T6237] kobject_add_internal+0x5ac/0xc3c [ 116.607026][ T6237] kobject_init_and_add+0x124/0x190 [ 116.607864][ T6237] gfs2_sys_fs_add+0x200/0x41c [ 116.608590][ T6237] gfs2_fill_super+0xddc/0x1a18 [ 116.609301][ T6237] get_tree_bdev+0x358/0x544 [ 116.609973][ T6237] gfs2_get_tree+0x54/0x1b4 [ 116.610637][ T6237] vfs_get_tree+0x90/0x274 [ 116.611312][ T6237] do_new_mount+0x228/0x810 [ 116.611992][ T6237] path_mount+0x5bc/0x1008 [ 116.612635][ T6237] __arm64_sys_mount+0x514/0x5f0 [ 116.613388][ T6237] invoke_syscall+0x98/0x2b0 [ 116.614114][ T6237] el0_svc_common+0x138/0x258 [ 116.614827][ T6237] do_el0_svc+0x58/0x13c [ 116.615478][ T6237] el0_svc+0x78/0x1d0 [ 116.616033][ T6237] el0t_64_sync_handler+0xcc/0xe4 [ 116.616833][ T6237] el0t_64_sync+0x1a0/0x1a4 [ 116.632931][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 48ms [ 116.634260][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 116.635157][ T6238] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 116.641053][ T6237] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 116.643142][ T6237] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 116.644790][ T6238] syz.2.356 (6238): drop_caches: 2 [ 116.647140][ T6242] loop3: detected capacity change from 0 to 32768 [ 116.688264][ T6242] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 116.689574][ T6242] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 116.692433][ T6242] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 116.701241][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 116.702273][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 116.756297][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 54ms [ 116.757668][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 116.758588][ T6242] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 116.771599][ T6242] syz.3.359 (6242): drop_caches: 2 [ 116.778349][ T6237] syz.0.358 (6237): drop_caches: 2 [ 116.999229][ T6246] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 117.000622][ T6246] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 117.008990][ T6246] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 117.010874][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 117.011878][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 117.048274][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 36ms [ 117.049608][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 117.056146][ T6246] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 117.060015][ T6246] syz.4.361 (6246): drop_caches: 2 [ 117.209153][ T6244] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 117.210406][ T6244] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 117.212709][ T6250] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 117.213409][ T6244] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 117.213871][ T6250] CPU: 1 PID: 6250 Comm: syz.2.362 Not tainted syzkaller #0 [ 117.216132][ T6250] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 117.217725][ T6250] Call trace: [ 117.218289][ T6250] dump_backtrace+0x0/0x458 [ 117.218955][ T6250] show_stack+0x2c/0x3c [ 117.219051][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 117.219608][ T6250] __dump_stack+0x30/0x40 [ 117.220693][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 117.221388][ T6250] dump_stack_lvl+0xf4/0x15c [ 117.223175][ T6250] dump_stack+0x1c/0x5c [ 117.223867][ T6250] sysfs_create_dir_ns+0x244/0x264 [ 117.224696][ T6250] kobject_add_internal+0x5ac/0xc3c [ 117.225599][ T6250] kobject_init_and_add+0x124/0x190 [ 117.226497][ T6250] gfs2_sys_fs_add+0x200/0x41c [ 117.227226][ T6250] gfs2_fill_super+0xddc/0x1a18 [ 117.227990][ T6250] get_tree_bdev+0x358/0x544 [ 117.228811][ T6250] gfs2_get_tree+0x54/0x1b4 [ 117.229634][ T6250] vfs_get_tree+0x90/0x274 [ 117.230423][ T6250] do_new_mount+0x228/0x810 [ 117.231213][ T6250] path_mount+0x5bc/0x1008 [ 117.231880][ T6250] __arm64_sys_mount+0x514/0x5f0 [ 117.232780][ T6250] invoke_syscall+0x98/0x2b0 [ 117.233506][ T6250] el0_svc_common+0x138/0x258 [ 117.234310][ T6250] do_el0_svc+0x58/0x13c [ 117.235064][ T6250] el0_svc+0x78/0x1d0 [ 117.235771][ T6250] el0t_64_sync_handler+0xcc/0xe4 [ 117.236590][ T6250] el0t_64_sync+0x1a0/0x1a4 [ 117.270245][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 117.271526][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 117.272409][ T6244] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 117.279320][ T6244] syz.1.360 (6244): drop_caches: 2 [ 117.286551][ T6250] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 117.296655][ T6250] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 117.300986][ T6250] syz.2.362 (6250): drop_caches: 2 [ 117.309148][ T6248] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 117.310282][ T6248] CPU: 0 PID: 6248 Comm: syz.0.364 Not tainted syzkaller #0 [ 117.311451][ T6248] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 117.313153][ T6248] Call trace: [ 117.313677][ T6248] dump_backtrace+0x0/0x458 [ 117.314445][ T6248] show_stack+0x2c/0x3c [ 117.315140][ T6248] __dump_stack+0x30/0x40 [ 117.315874][ T6248] dump_stack_lvl+0xf4/0x15c [ 117.316699][ T6248] dump_stack+0x1c/0x5c [ 117.317418][ T6248] sysfs_create_dir_ns+0x244/0x264 [ 117.318263][ T6248] kobject_add_internal+0x5ac/0xc3c [ 117.319080][ T6248] kobject_init_and_add+0x124/0x190 [ 117.319972][ T6248] gfs2_sys_fs_add+0x200/0x41c [ 117.320761][ T6248] gfs2_fill_super+0xddc/0x1a18 [ 117.321624][ T6248] get_tree_bdev+0x358/0x544 [ 117.322359][ T6248] gfs2_get_tree+0x54/0x1b4 [ 117.323081][ T6248] vfs_get_tree+0x90/0x274 [ 117.323892][ T6248] do_new_mount+0x228/0x810 [ 117.324631][ T6248] path_mount+0x5bc/0x1008 [ 117.325388][ T6248] __arm64_sys_mount+0x514/0x5f0 [ 117.326228][ T6248] invoke_syscall+0x98/0x2b0 [ 117.327082][ T6248] el0_svc_common+0x138/0x258 [ 117.327846][ T6248] do_el0_svc+0x58/0x13c [ 117.328575][ T6248] el0_svc+0x78/0x1d0 [ 117.329202][ T6248] el0t_64_sync_handler+0xcc/0xe4 [ 117.330040][ T6248] el0t_64_sync+0x1a0/0x1a4 [ 117.382650][ T6252] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 117.383990][ T6252] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 117.386980][ T6252] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 117.389393][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 117.390390][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 117.420911][ T6248] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 117.423835][ T6254] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 117.425006][ T6254] CPU: 0 PID: 6254 Comm: syz.4.365 Not tainted syzkaller #0 [ 117.426237][ T6254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 117.427975][ T6254] Call trace: [ 117.428505][ T6254] dump_backtrace+0x0/0x458 [ 117.429250][ T6254] show_stack+0x2c/0x3c [ 117.429942][ T6254] __dump_stack+0x30/0x40 [ 117.430677][ T6254] dump_stack_lvl+0xf4/0x15c [ 117.431431][ T6254] dump_stack+0x1c/0x5c [ 117.432082][ T6254] sysfs_create_dir_ns+0x244/0x264 [ 117.432949][ T6254] kobject_add_internal+0x5ac/0xc3c [ 117.433740][ T6254] kobject_init_and_add+0x124/0x190 [ 117.434529][ T6254] gfs2_sys_fs_add+0x200/0x41c [ 117.435332][ T6254] gfs2_fill_super+0xddc/0x1a18 [ 117.436009][ T6254] get_tree_bdev+0x358/0x544 [ 117.436734][ T6254] gfs2_get_tree+0x54/0x1b4 [ 117.437396][ T6254] vfs_get_tree+0x90/0x274 [ 117.438088][ T6254] do_new_mount+0x228/0x810 [ 117.438795][ T6254] path_mount+0x5bc/0x1008 [ 117.439496][ T6254] __arm64_sys_mount+0x514/0x5f0 [ 117.440244][ T6254] invoke_syscall+0x98/0x2b0 [ 117.441076][ T6254] el0_svc_common+0x138/0x258 [ 117.441896][ T6254] do_el0_svc+0x58/0x13c [ 117.442613][ T6254] el0_svc+0x78/0x1d0 [ 117.443215][ T6254] el0t_64_sync_handler+0xcc/0xe4 [ 117.444022][ T6254] el0t_64_sync+0x1a0/0x1a4 [ 117.451222][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 60ms [ 117.452477][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 117.453360][ T6252] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 117.455552][ T6248] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 117.460308][ T6252] syz.3.363 (6252): drop_caches: 2 [ 117.461388][ T6248] syz.0.364 (6248): drop_caches: 2 [ 117.487408][ T6254] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 117.489709][ T6254] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 117.684397][ T6256] syz.2.367 (6256): drop_caches: 2 [ 117.725334][ T6254] syz.4.365 (6254): drop_caches: 2 [ 117.799105][ T6258] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 117.800592][ T6258] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 117.803676][ T6258] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 117.813367][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 117.814531][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 117.851312][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 36ms [ 117.852633][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 117.853559][ T6258] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 117.858268][ T6258] syz.1.366 (6258): drop_caches: 2 [ 117.909928][ T6260] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 117.911347][ T6260] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 117.914105][ T6260] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 117.942497][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 117.943558][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 117.982715][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 39ms [ 117.984001][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 117.984793][ T6260] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 117.991460][ T6260] syz.0.369 (6260): drop_caches: 2 [ 118.069875][ T6262] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 118.071223][ T6262] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 118.078286][ T6262] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 118.080261][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 118.081250][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 118.118084][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 36ms [ 118.119372][ T6264] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 118.120748][ T6264] CPU: 0 PID: 6264 Comm: syz.2.370 Not tainted syzkaller #0 [ 118.121842][ T6264] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 118.123493][ T6264] Call trace: [ 118.124018][ T6264] dump_backtrace+0x0/0x458 [ 118.124761][ T6264] show_stack+0x2c/0x3c [ 118.125456][ T6264] __dump_stack+0x30/0x40 [ 118.126173][ T6264] dump_stack_lvl+0xf4/0x15c [ 118.126881][ T6264] dump_stack+0x1c/0x5c [ 118.127508][ T6264] sysfs_create_dir_ns+0x244/0x264 [ 118.128236][ T6264] kobject_add_internal+0x5ac/0xc3c [ 118.128972][ T6264] kobject_init_and_add+0x124/0x190 [ 118.129767][ T6264] gfs2_sys_fs_add+0x200/0x41c [ 118.130521][ T6264] gfs2_fill_super+0xddc/0x1a18 [ 118.131292][ T6264] get_tree_bdev+0x358/0x544 [ 118.132039][ T6264] gfs2_get_tree+0x54/0x1b4 [ 118.132817][ T6264] vfs_get_tree+0x90/0x274 [ 118.133579][ T6264] do_new_mount+0x228/0x810 [ 118.134335][ T6264] path_mount+0x5bc/0x1008 [ 118.135029][ T6264] __arm64_sys_mount+0x514/0x5f0 [ 118.135872][ T6264] invoke_syscall+0x98/0x2b0 [ 118.136715][ T6264] el0_svc_common+0x138/0x258 [ 118.137498][ T6264] do_el0_svc+0x58/0x13c [ 118.138230][ T6264] el0_svc+0x78/0x1d0 [ 118.138896][ T6264] el0t_64_sync_handler+0xcc/0xe4 [ 118.139788][ T6264] el0t_64_sync+0x1a0/0x1a4 [ 118.140877][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 118.141634][ T6262] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 118.146900][ T6262] syz.3.368 (6262): drop_caches: 2 [ 118.197791][ T6264] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 118.199991][ T6264] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 118.205121][ T6264] syz.2.370 (6264): drop_caches: 2 1970/01/01 00:01:58 executed programs: 369 [ 118.298997][ T6266] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 118.300542][ T6266] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 118.303756][ T6266] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 118.305476][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 118.306608][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 118.348633][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 118.349932][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 118.350840][ T6266] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 118.355838][ T6266] syz.4.371 (6266): drop_caches: 2 [ 118.452391][ T6268] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 118.453810][ T6268] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 118.456553][ T6268] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 118.459705][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 118.460845][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 118.500232][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 39ms [ 118.501576][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 118.502475][ T6268] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 118.510829][ T6268] syz.1.372 (6268): drop_caches: 2 [ 118.539758][ T6270] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 118.541149][ T6270] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 118.559012][ T6270] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 118.560922][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 118.562032][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 118.624691][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 62ms [ 118.626063][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 118.626957][ T6270] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 118.631949][ T6270] syz.0.373 (6270): drop_caches: 2 [ 118.722277][ T6272] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 118.723636][ T6272] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 118.724962][ T6274] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 118.726222][ T6274] CPU: 1 PID: 6274 Comm: syz.2.375 Not tainted syzkaller #0 [ 118.727490][ T6274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 118.729286][ T6274] Call trace: [ 118.729805][ T6274] dump_backtrace+0x0/0x458 [ 118.730571][ T6274] show_stack+0x2c/0x3c [ 118.731266][ T6274] __dump_stack+0x30/0x40 [ 118.731993][ T6274] dump_stack_lvl+0xf4/0x15c [ 118.732811][ T6274] dump_stack+0x1c/0x5c [ 118.733530][ T6274] sysfs_create_dir_ns+0x244/0x264 [ 118.734407][ T6274] kobject_add_internal+0x5ac/0xc3c [ 118.735249][ T6274] kobject_init_and_add+0x124/0x190 [ 118.736116][ T6274] gfs2_sys_fs_add+0x200/0x41c [ 118.736908][ T6274] gfs2_fill_super+0xddc/0x1a18 [ 118.737668][ T6274] get_tree_bdev+0x358/0x544 [ 118.738484][ T6274] gfs2_get_tree+0x54/0x1b4 [ 118.739291][ T6274] vfs_get_tree+0x90/0x274 [ 118.739990][ T6274] do_new_mount+0x228/0x810 [ 118.740763][ T6274] path_mount+0x5bc/0x1008 [ 118.741557][ T6274] __arm64_sys_mount+0x514/0x5f0 [ 118.742385][ T6274] invoke_syscall+0x98/0x2b0 [ 118.743193][ T6274] el0_svc_common+0x138/0x258 [ 118.743946][ T6274] do_el0_svc+0x58/0x13c [ 118.744632][ T6274] el0_svc+0x78/0x1d0 [ 118.745270][ T6274] el0t_64_sync_handler+0xcc/0xe4 [ 118.746060][ T6274] el0t_64_sync+0x1a0/0x1a4 [ 118.760358][ T6272] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 118.762976][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 118.763982][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 118.807519][ T6274] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 118.810637][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 46ms [ 118.810845][ T6274] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 118.813297][ T6276] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 118.814484][ T6276] CPU: 0 PID: 6276 Comm: syz.4.376 Not tainted syzkaller #0 [ 118.815683][ T6276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 118.816964][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 118.817390][ T6276] Call trace: [ 118.817397][ T6276] dump_backtrace+0x0/0x458 [ 118.817413][ T6276] show_stack+0x2c/0x3c [ 118.817419][ T6276] __dump_stack+0x30/0x40 [ 118.817427][ T6276] dump_stack_lvl+0xf4/0x15c [ 118.817433][ T6276] dump_stack+0x1c/0x5c [ 118.817439][ T6276] sysfs_create_dir_ns+0x244/0x264 [ 118.817445][ T6276] kobject_add_internal+0x5ac/0xc3c [ 118.817452][ T6276] kobject_init_and_add+0x124/0x190 [ 118.817457][ T6276] gfs2_sys_fs_add+0x200/0x41c [ 118.817462][ T6276] gfs2_fill_super+0xddc/0x1a18 [ 118.817481][ T6276] get_tree_bdev+0x358/0x544 [ 118.817488][ T6276] gfs2_get_tree+0x54/0x1b4 [ 118.817492][ T6276] vfs_get_tree+0x90/0x274 [ 118.817498][ T6276] do_new_mount+0x228/0x810 [ 118.817503][ T6276] path_mount+0x5bc/0x1008 [ 118.817508][ T6276] __arm64_sys_mount+0x514/0x5f0 [ 118.819668][ T6272] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 118.820274][ T6276] invoke_syscall+0x98/0x2b0 [ 118.824668][ T6272] syz.3.374 (6272): drop_caches: 2 [ 118.825125][ T6276] el0_svc_common+0x138/0x258 [ 118.834723][ T6276] do_el0_svc+0x58/0x13c [ 118.835495][ T6276] el0_svc+0x78/0x1d0 [ 118.836179][ T6276] el0t_64_sync_handler+0xcc/0xe4 [ 118.837075][ T6276] el0t_64_sync+0x1a0/0x1a4 [ 118.923719][ T6276] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 118.925854][ T6276] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 118.944044][ T6276] syz.4.376 (6276): drop_caches: 2 [ 118.979643][ T6274] syz.2.375 (6274): drop_caches: 2 [ 119.079637][ T6278] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.081114][ T6278] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.084156][ T6278] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.088716][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.089813][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 119.137229][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 47ms [ 119.138645][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 119.139456][ T6278] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 119.144021][ T6278] syz.1.377 (6278): drop_caches: 2 [ 119.279677][ T6280] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.281069][ T6280] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.284304][ T6280] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.289224][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.289341][ T6282] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 119.290318][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 119.291568][ T6282] CPU: 1 PID: 6282 Comm: syz.3.379 Not tainted syzkaller #0 [ 119.293919][ T6282] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 119.295694][ T6282] Call trace: [ 119.296196][ T6282] dump_backtrace+0x0/0x458 [ 119.296914][ T6282] show_stack+0x2c/0x3c [ 119.297605][ T6282] __dump_stack+0x30/0x40 [ 119.298349][ T6282] dump_stack_lvl+0xf4/0x15c [ 119.299169][ T6282] dump_stack+0x1c/0x5c [ 119.299832][ T6282] sysfs_create_dir_ns+0x244/0x264 [ 119.300732][ T6282] kobject_add_internal+0x5ac/0xc3c [ 119.301644][ T6282] kobject_init_and_add+0x124/0x190 [ 119.302527][ T6282] gfs2_sys_fs_add+0x200/0x41c [ 119.303388][ T6282] gfs2_fill_super+0xddc/0x1a18 [ 119.304277][ T6282] get_tree_bdev+0x358/0x544 [ 119.305113][ T6282] gfs2_get_tree+0x54/0x1b4 [ 119.305914][ T6282] vfs_get_tree+0x90/0x274 [ 119.306661][ T6282] do_new_mount+0x228/0x810 [ 119.307440][ T6282] path_mount+0x5bc/0x1008 [ 119.308195][ T6282] __arm64_sys_mount+0x514/0x5f0 [ 119.309040][ T6282] invoke_syscall+0x98/0x2b0 [ 119.309919][ T6282] el0_svc_common+0x138/0x258 [ 119.310700][ T6282] do_el0_svc+0x58/0x13c [ 119.311426][ T6282] el0_svc+0x78/0x1d0 [ 119.312079][ T6282] el0t_64_sync_handler+0xcc/0xe4 [ 119.312908][ T6282] el0t_64_sync+0x1a0/0x1a4 [ 119.326516][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 36ms [ 119.328178][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 119.329107][ T6280] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 119.339454][ T6286] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 119.340600][ T6286] CPU: 0 PID: 6286 Comm: syz.2.381 Not tainted syzkaller #0 [ 119.341818][ T6286] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 119.343460][ T6286] Call trace: [ 119.343964][ T6286] dump_backtrace+0x0/0x458 [ 119.344709][ T6286] show_stack+0x2c/0x3c [ 119.345435][ T6286] __dump_stack+0x30/0x40 [ 119.346147][ T6286] dump_stack_lvl+0xf4/0x15c [ 119.346925][ T6286] dump_stack+0x1c/0x5c [ 119.347596][ T6286] sysfs_create_dir_ns+0x244/0x264 [ 119.348457][ T6286] kobject_add_internal+0x5ac/0xc3c [ 119.349395][ T6286] kobject_init_and_add+0x124/0x190 [ 119.350260][ T6286] gfs2_sys_fs_add+0x200/0x41c [ 119.351091][ T6286] gfs2_fill_super+0xddc/0x1a18 [ 119.351907][ T6286] get_tree_bdev+0x358/0x544 [ 119.352684][ T6286] gfs2_get_tree+0x54/0x1b4 [ 119.353449][ T6286] vfs_get_tree+0x90/0x274 [ 119.354195][ T6286] do_new_mount+0x228/0x810 [ 119.354923][ T6286] path_mount+0x5bc/0x1008 [ 119.355647][ T6286] __arm64_sys_mount+0x514/0x5f0 [ 119.356422][ T6286] invoke_syscall+0x98/0x2b0 [ 119.357113][ T6286] el0_svc_common+0x138/0x258 [ 119.357840][ T6286] do_el0_svc+0x58/0x13c [ 119.358531][ T6286] el0_svc+0x78/0x1d0 [ 119.359190][ T6286] el0t_64_sync_handler+0xcc/0xe4 [ 119.360007][ T6286] el0t_64_sync+0x1a0/0x1a4 [ 119.365427][ T6280] syz.0.378 (6280): drop_caches: 2 [ 119.367833][ T6282] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 119.369972][ T6282] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 119.382201][ T6286] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 119.384305][ T6286] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 119.386278][ T6286] syz.2.381 (6286): drop_caches: 2 [ 119.447090][ T6284] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.449736][ T6284] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.452654][ T6284] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.457173][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.458677][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 119.508279][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 119.509622][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 119.510508][ T6284] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 119.521402][ T6284] syz.4.380 (6284): drop_caches: 2 [ 119.572717][ T6282] syz.3.379 (6282): drop_caches: 2 [ 119.639563][ T6288] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.640895][ T6288] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.643702][ T6288] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.652046][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.653168][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 119.703653][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 50ms [ 119.705046][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 119.705926][ T6288] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 119.713024][ T6288] syz.1.382 (6288): drop_caches: 2 [ 119.859737][ T6290] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.861250][ T6290] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.864233][ T6290] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.871591][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.872744][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 119.914001][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 119.915419][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 119.916319][ T6290] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 119.921998][ T6290] syz.2.384 (6290): drop_caches: 2 [ 119.951834][ T6292] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 119.953193][ T6292] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 119.955968][ T6292] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 119.970552][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 119.971601][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 120.003518][ T6296] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 120.004661][ T6296] CPU: 0 PID: 6296 Comm: syz.3.386 Not tainted syzkaller #0 [ 120.005750][ T6296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 120.007268][ T6296] Call trace: [ 120.007802][ T6296] dump_backtrace+0x0/0x458 [ 120.008435][ T6296] show_stack+0x2c/0x3c [ 120.009101][ T6296] __dump_stack+0x30/0x40 [ 120.009782][ T6296] dump_stack_lvl+0xf4/0x15c [ 120.010496][ T6296] dump_stack+0x1c/0x5c [ 120.011189][ T6296] sysfs_create_dir_ns+0x244/0x264 [ 120.012014][ T6296] kobject_add_internal+0x5ac/0xc3c [ 120.012822][ T6296] kobject_init_and_add+0x124/0x190 [ 120.013589][ T6296] gfs2_sys_fs_add+0x200/0x41c [ 120.014313][ T6296] gfs2_fill_super+0xddc/0x1a18 [ 120.015143][ T6296] get_tree_bdev+0x358/0x544 [ 120.015898][ T6296] gfs2_get_tree+0x54/0x1b4 [ 120.016699][ T6296] vfs_get_tree+0x90/0x274 [ 120.017455][ T6296] do_new_mount+0x228/0x810 [ 120.018194][ T6296] path_mount+0x5bc/0x1008 [ 120.018899][ T6296] __arm64_sys_mount+0x514/0x5f0 [ 120.019688][ T6296] invoke_syscall+0x98/0x2b0 [ 120.020446][ T6296] el0_svc_common+0x138/0x258 [ 120.021231][ T6296] do_el0_svc+0x58/0x13c [ 120.021931][ T6296] el0_svc+0x78/0x1d0 [ 120.022564][ T6296] el0t_64_sync_handler+0xcc/0xe4 [ 120.023489][ T6296] el0t_64_sync+0x1a0/0x1a4 [ 120.026149][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 54ms [ 120.041146][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 120.042008][ T6292] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 120.048411][ T6292] syz.0.383 (6292): drop_caches: 2 [ 120.052271][ T6296] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 120.055230][ T6296] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 120.069050][ T6294] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 120.070284][ T6294] CPU: 0 PID: 6294 Comm: syz.4.385 Not tainted syzkaller #0 [ 120.071509][ T6294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 120.073133][ T6294] Call trace: [ 120.073701][ T6294] dump_backtrace+0x0/0x458 [ 120.074449][ T6294] show_stack+0x2c/0x3c [ 120.075148][ T6294] __dump_stack+0x30/0x40 [ 120.075900][ T6294] dump_stack_lvl+0xf4/0x15c [ 120.076654][ T6294] dump_stack+0x1c/0x5c [ 120.077311][ T6294] sysfs_create_dir_ns+0x244/0x264 [ 120.078136][ T6294] kobject_add_internal+0x5ac/0xc3c [ 120.079118][ T6294] kobject_init_and_add+0x124/0x190 [ 120.079968][ T6294] gfs2_sys_fs_add+0x200/0x41c [ 120.080778][ T6294] gfs2_fill_super+0xddc/0x1a18 [ 120.081632][ T6294] get_tree_bdev+0x358/0x544 [ 120.082385][ T6294] gfs2_get_tree+0x54/0x1b4 [ 120.083054][ T6294] vfs_get_tree+0x90/0x274 [ 120.083706][ T6294] do_new_mount+0x228/0x810 [ 120.084537][ T6294] path_mount+0x5bc/0x1008 [ 120.085277][ T6294] __arm64_sys_mount+0x514/0x5f0 [ 120.086129][ T6294] invoke_syscall+0x98/0x2b0 [ 120.086890][ T6294] el0_svc_common+0x138/0x258 [ 120.087756][ T6294] do_el0_svc+0x58/0x13c [ 120.088484][ T6294] el0_svc+0x78/0x1d0 [ 120.089139][ T6294] el0t_64_sync_handler+0xcc/0xe4 [ 120.089926][ T6294] el0t_64_sync+0x1a0/0x1a4 [ 120.110800][ T6296] syz.3.386 (6296): drop_caches: 2 [ 120.128054][ T6294] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 120.130323][ T6294] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 120.132942][ T6294] syz.4.385 (6294): drop_caches: 2 [ 120.319173][ T6298] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 120.320520][ T6298] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 120.323302][ T6298] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 120.324996][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 120.325970][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 120.368207][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 120.369505][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 120.370422][ T6298] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 120.375593][ T6298] syz.1.387 (6298): drop_caches: 2 [ 120.435959][ T6300] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 120.437226][ T6300] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 120.445555][ T6300] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 120.454707][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 120.455834][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 120.513422][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 57ms [ 120.521387][ T6302] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 120.522566][ T6302] CPU: 0 PID: 6302 Comm: syz.0.389 Not tainted syzkaller #0 [ 120.523918][ T6302] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 120.525662][ T6302] Call trace: [ 120.526201][ T6302] dump_backtrace+0x0/0x458 [ 120.526945][ T6302] show_stack+0x2c/0x3c [ 120.527698][ T6302] __dump_stack+0x30/0x40 [ 120.528555][ T6302] dump_stack_lvl+0xf4/0x15c [ 120.529333][ T6302] dump_stack+0x1c/0x5c [ 120.529973][ T6302] sysfs_create_dir_ns+0x244/0x264 [ 120.530874][ T6302] kobject_add_internal+0x5ac/0xc3c [ 120.531734][ T6302] kobject_init_and_add+0x124/0x190 [ 120.532599][ T6302] gfs2_sys_fs_add+0x200/0x41c [ 120.533448][ T6302] gfs2_fill_super+0xddc/0x1a18 [ 120.534298][ T6302] get_tree_bdev+0x358/0x544 [ 120.535086][ T6302] gfs2_get_tree+0x54/0x1b4 [ 120.535789][ T6302] vfs_get_tree+0x90/0x274 [ 120.536491][ T6302] do_new_mount+0x228/0x810 [ 120.537282][ T6302] path_mount+0x5bc/0x1008 [ 120.538010][ T6302] __arm64_sys_mount+0x514/0x5f0 [ 120.538826][ T6302] invoke_syscall+0x98/0x2b0 [ 120.539644][ T6302] el0_svc_common+0x138/0x258 [ 120.540435][ T6302] do_el0_svc+0x58/0x13c [ 120.541135][ T6302] el0_svc+0x78/0x1d0 [ 120.541827][ T6302] el0t_64_sync_handler+0xcc/0xe4 [ 120.542703][ T6302] el0t_64_sync+0x1a0/0x1a4 [ 120.545584][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 120.546434][ T6300] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 120.550593][ T6300] syz.2.388 (6300): drop_caches: 2 [ 120.601532][ T6306] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 120.602982][ T6306] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 120.604533][ T6302] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 120.606820][ T6302] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 120.611698][ T6306] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 120.612588][ T6302] syz.0.389 (6302): drop_caches: 2 [ 120.613532][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 120.614802][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 120.638317][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 120.639711][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 120.640576][ T6306] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 120.644436][ T6306] syz.4.391 (6306): drop_caches: 2 [ 120.740439][ T6304] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 120.741728][ T6304] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 120.753443][ T6304] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 120.755244][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 120.756219][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 120.798070][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 120.799406][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 120.800328][ T6304] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 120.805545][ T6304] syz.3.390 (6304): drop_caches: 2 [ 120.966042][ T6312] set_capacity_and_notify: 31 callbacks suppressed [ 120.966052][ T6312] loop0: detected capacity change from 0 to 32768 [ 121.016744][ T6310] loop2: detected capacity change from 0 to 32768 [ 121.031833][ T6312] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 121.033185][ T6312] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 121.041506][ T6312] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 121.045242][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 121.046323][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 121.064530][ T6308] loop1: detected capacity change from 0 to 32768 [ 121.069399][ T6310] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 121.070607][ T6310] CPU: 0 PID: 6310 Comm: syz.2.393 Not tainted syzkaller #0 [ 121.071821][ T6310] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 121.073663][ T6310] Call trace: [ 121.074261][ T6310] dump_backtrace+0x0/0x458 [ 121.075040][ T6310] show_stack+0x2c/0x3c [ 121.075732][ T6310] __dump_stack+0x30/0x40 [ 121.076397][ T6310] dump_stack_lvl+0xf4/0x15c [ 121.077164][ T6310] dump_stack+0x1c/0x5c [ 121.077858][ T6310] sysfs_create_dir_ns+0x244/0x264 [ 121.078718][ T6310] kobject_add_internal+0x5ac/0xc3c [ 121.079611][ T6310] kobject_init_and_add+0x124/0x190 [ 121.080489][ T6310] gfs2_sys_fs_add+0x200/0x41c [ 121.081241][ T6310] gfs2_fill_super+0xddc/0x1a18 [ 121.082005][ T6310] get_tree_bdev+0x358/0x544 [ 121.082750][ T6310] gfs2_get_tree+0x54/0x1b4 [ 121.083456][ T6310] vfs_get_tree+0x90/0x274 [ 121.084157][ T6310] do_new_mount+0x228/0x810 [ 121.084868][ T6310] path_mount+0x5bc/0x1008 [ 121.085618][ T6310] __arm64_sys_mount+0x514/0x5f0 [ 121.086445][ T6310] invoke_syscall+0x98/0x2b0 [ 121.087212][ T6310] el0_svc_common+0x138/0x258 [ 121.088035][ T6310] do_el0_svc+0x58/0x13c [ 121.088761][ T6310] el0_svc+0x78/0x1d0 [ 121.089295][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 121.089453][ T6310] el0t_64_sync_handler+0xcc/0xe4 [ 121.090791][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 121.091485][ T6310] el0t_64_sync+0x1a0/0x1a4 [ 121.098128][ T6312] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 121.101803][ T6312] syz.0.394 (6312): drop_caches: 2 [ 121.115453][ T6308] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 121.116692][ T6308] CPU: 0 PID: 6308 Comm: syz.1.392 Not tainted syzkaller #0 [ 121.117924][ T6308] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 121.119607][ T6308] Call trace: [ 121.120145][ T6308] dump_backtrace+0x0/0x458 [ 121.120919][ T6308] show_stack+0x2c/0x3c [ 121.121602][ T6308] __dump_stack+0x30/0x40 [ 121.122327][ T6308] dump_stack_lvl+0xf4/0x15c [ 121.123073][ T6308] dump_stack+0x1c/0x5c [ 121.123789][ T6308] sysfs_create_dir_ns+0x244/0x264 [ 121.124651][ T6308] kobject_add_internal+0x5ac/0xc3c [ 121.125523][ T6308] kobject_init_and_add+0x124/0x190 [ 121.126364][ T6308] gfs2_sys_fs_add+0x200/0x41c [ 121.127166][ T6308] gfs2_fill_super+0xddc/0x1a18 [ 121.128013][ T6308] get_tree_bdev+0x358/0x544 [ 121.128780][ T6308] gfs2_get_tree+0x54/0x1b4 [ 121.129492][ T6308] vfs_get_tree+0x90/0x274 [ 121.130258][ T6308] do_new_mount+0x228/0x810 [ 121.131011][ T6308] path_mount+0x5bc/0x1008 [ 121.131698][ T6308] __arm64_sys_mount+0x514/0x5f0 [ 121.132519][ T6308] invoke_syscall+0x98/0x2b0 [ 121.133315][ T6308] el0_svc_common+0x138/0x258 [ 121.134086][ T6308] do_el0_svc+0x58/0x13c [ 121.134799][ T6308] el0_svc+0x78/0x1d0 [ 121.135488][ T6308] el0t_64_sync_handler+0xcc/0xe4 [ 121.136360][ T6308] el0t_64_sync+0x1a0/0x1a4 [ 121.169201][ T6310] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 121.171297][ T6310] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 121.189207][ T6310] syz.2.393 (6310): drop_caches: 2 [ 121.197641][ T6308] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 121.199586][ T6308] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 121.206089][ T6308] syz.1.392 (6308): drop_caches: 2 [ 121.214887][ T6314] loop4: detected capacity change from 0 to 32768 [ 121.249977][ T6314] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 121.251358][ T6314] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 121.262000][ T6314] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 121.263908][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 121.264306][ T6316] loop3: detected capacity change from 0 to 32768 [ 121.264909][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 121.307864][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 121.309166][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 121.309993][ T6314] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 121.314283][ T6314] syz.4.395 (6314): drop_caches: 2 [ 121.399414][ T6316] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 121.400773][ T6316] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 121.403465][ T6316] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 121.410708][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 121.411758][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 121.452780][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 121.454072][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 121.454950][ T6316] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 121.460728][ T6316] syz.3.396 (6316): drop_caches: 2 [ 121.637002][ T6318] loop0: detected capacity change from 0 to 32768 [ 121.653045][ T6324] syz.4.400 (6324): drop_caches: 2 [ 121.683298][ T6322] loop2: detected capacity change from 0 to 32768 [ 121.707025][ T6321] loop1: detected capacity change from 0 to 32768 [ 121.713367][ T6322] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 121.713409][ T6318] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 121.714628][ T6322] CPU: 0 PID: 6322 Comm: syz.2.398 Not tainted syzkaller #0 [ 121.715977][ T6318] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 121.717127][ T6322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 121.719761][ T6322] Call trace: [ 121.720375][ T6322] dump_backtrace+0x0/0x458 [ 121.720583][ T6318] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 121.721128][ T6322] show_stack+0x2c/0x3c [ 121.722850][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 121.722993][ T6322] __dump_stack+0x30/0x40 [ 121.724042][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 121.724849][ T6322] dump_stack_lvl+0xf4/0x15c [ 121.726632][ T6322] dump_stack+0x1c/0x5c [ 121.727325][ T6322] sysfs_create_dir_ns+0x244/0x264 [ 121.728176][ T6322] kobject_add_internal+0x5ac/0xc3c [ 121.729005][ T6322] kobject_init_and_add+0x124/0x190 [ 121.729835][ T6322] gfs2_sys_fs_add+0x200/0x41c [ 121.730609][ T6322] gfs2_fill_super+0xddc/0x1a18 [ 121.731358][ T6322] get_tree_bdev+0x358/0x544 [ 121.732083][ T6322] gfs2_get_tree+0x54/0x1b4 [ 121.732905][ T6322] vfs_get_tree+0x90/0x274 [ 121.733601][ T6322] do_new_mount+0x228/0x810 [ 121.734367][ T6322] path_mount+0x5bc/0x1008 [ 121.735044][ T6322] __arm64_sys_mount+0x514/0x5f0 [ 121.735785][ T6322] invoke_syscall+0x98/0x2b0 [ 121.736627][ T6322] el0_svc_common+0x138/0x258 [ 121.737387][ T6322] do_el0_svc+0x58/0x13c [ 121.738131][ T6322] el0_svc+0x78/0x1d0 [ 121.738825][ T6322] el0t_64_sync_handler+0xcc/0xe4 [ 121.739684][ T6322] el0t_64_sync+0x1a0/0x1a4 [ 121.759808][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 35ms [ 121.761062][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 121.762015][ T6318] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 121.767148][ T6318] syz.0.397 (6318): drop_caches: 2 [ 121.778814][ T6321] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 121.779982][ T6321] CPU: 1 PID: 6321 Comm: syz.1.399 Not tainted syzkaller #0 [ 121.781211][ T6321] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 121.782868][ T6321] Call trace: [ 121.783458][ T6321] dump_backtrace+0x0/0x458 [ 121.784217][ T6321] show_stack+0x2c/0x3c [ 121.784903][ T6321] __dump_stack+0x30/0x40 [ 121.785651][ T6321] dump_stack_lvl+0xf4/0x15c [ 121.786427][ T6321] dump_stack+0x1c/0x5c [ 121.787141][ T6321] sysfs_create_dir_ns+0x244/0x264 [ 121.787991][ T6321] kobject_add_internal+0x5ac/0xc3c [ 121.788852][ T6321] kobject_init_and_add+0x124/0x190 [ 121.789704][ T6321] gfs2_sys_fs_add+0x200/0x41c [ 121.790463][ T6321] gfs2_fill_super+0xddc/0x1a18 [ 121.791297][ T6321] get_tree_bdev+0x358/0x544 [ 121.792014][ T6321] gfs2_get_tree+0x54/0x1b4 [ 121.792710][ T6321] vfs_get_tree+0x90/0x274 [ 121.793405][ T6321] do_new_mount+0x228/0x810 [ 121.794083][ T6321] path_mount+0x5bc/0x1008 [ 121.794768][ T6321] __arm64_sys_mount+0x514/0x5f0 [ 121.795524][ T6321] invoke_syscall+0x98/0x2b0 [ 121.796217][ T6321] el0_svc_common+0x138/0x258 [ 121.796967][ T6321] do_el0_svc+0x58/0x13c [ 121.797659][ T6321] el0_svc+0x78/0x1d0 [ 121.798312][ T6321] el0t_64_sync_handler+0xcc/0xe4 [ 121.799136][ T6321] el0t_64_sync+0x1a0/0x1a4 [ 121.814532][ T6322] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 121.816694][ T6322] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 121.833314][ T6326] loop3: detected capacity change from 0 to 32768 [ 121.845795][ T6321] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 121.847971][ T6321] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 121.856807][ T6321] syz.1.399 (6321): drop_caches: 2 [ 121.929952][ T6326] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 121.931393][ T6326] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 121.941955][ T6326] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 121.968250][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 121.969340][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 122.005440][ T6322] syz.2.398 (6322): drop_caches: 2 [ 122.018598][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 122.019957][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 122.020828][ T6326] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 122.029921][ T6326] syz.3.401 (6326): drop_caches: 2 [ 122.120423][ T6328] loop4: detected capacity change from 0 to 32768 [ 122.124580][ T6328] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 122.125974][ T6328] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 122.154080][ T6328] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 122.165903][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 122.166932][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 122.209667][ T6334] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 122.210747][ T6334] CPU: 0 PID: 6334 Comm: syz.2.405 Not tainted syzkaller #0 [ 122.211879][ T6334] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 122.213510][ T6334] Call trace: [ 122.214064][ T6334] dump_backtrace+0x0/0x458 [ 122.214810][ T6334] show_stack+0x2c/0x3c [ 122.215487][ T6334] __dump_stack+0x30/0x40 [ 122.216245][ T6334] dump_stack_lvl+0xf4/0x15c [ 122.217017][ T6334] dump_stack+0x1c/0x5c [ 122.217051][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 50ms [ 122.217676][ T6334] sysfs_create_dir_ns+0x244/0x264 [ 122.217697][ T6334] kobject_add_internal+0x5ac/0xc3c [ 122.217706][ T6334] kobject_init_and_add+0x124/0x190 [ 122.217711][ T6334] gfs2_sys_fs_add+0x200/0x41c [ 122.217717][ T6334] gfs2_fill_super+0xddc/0x1a18 [ 122.217723][ T6334] get_tree_bdev+0x358/0x544 [ 122.217729][ T6334] gfs2_get_tree+0x54/0x1b4 [ 122.217734][ T6334] vfs_get_tree+0x90/0x274 [ 122.217739][ T6334] do_new_mount+0x228/0x810 [ 122.217744][ T6334] path_mount+0x5bc/0x1008 [ 122.217749][ T6334] __arm64_sys_mount+0x514/0x5f0 [ 122.217753][ T6334] invoke_syscall+0x98/0x2b0 [ 122.217759][ T6334] el0_svc_common+0x138/0x258 [ 122.221964][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 122.222084][ T6334] do_el0_svc+0x58/0x13c [ 122.222940][ T6328] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 122.223700][ T6334] el0_svc+0x78/0x1d0 [ 122.230198][ T6328] syz.4.402 (6328): drop_caches: 2 [ 122.230420][ T6334] el0t_64_sync_handler+0xcc/0xe4 [ 122.233872][ T6334] el0t_64_sync+0x1a0/0x1a4 [ 122.296040][ T6334] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 122.298315][ T6334] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 122.322840][ T6332] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 122.324190][ T6332] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 122.345635][ T6332] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 122.350401][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 122.351449][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 122.400524][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 122.401752][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 122.402734][ T6332] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 122.405389][ T6330] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 122.406552][ T6330] CPU: 0 PID: 6330 Comm: syz.1.404 Not tainted syzkaller #0 [ 122.407652][ T6330] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 122.409189][ T6330] Call trace: [ 122.409704][ T6330] dump_backtrace+0x0/0x458 [ 122.410405][ T6330] show_stack+0x2c/0x3c [ 122.411107][ T6330] __dump_stack+0x30/0x40 [ 122.411808][ T6330] dump_stack_lvl+0xf4/0x15c [ 122.412563][ T6330] dump_stack+0x1c/0x5c [ 122.413269][ T6330] sysfs_create_dir_ns+0x244/0x264 [ 122.414168][ T6330] kobject_add_internal+0x5ac/0xc3c [ 122.415038][ T6330] kobject_init_and_add+0x124/0x190 [ 122.415970][ T6330] gfs2_sys_fs_add+0x200/0x41c [ 122.416776][ T6330] gfs2_fill_super+0xddc/0x1a18 [ 122.417582][ T6330] get_tree_bdev+0x358/0x544 [ 122.418354][ T6330] gfs2_get_tree+0x54/0x1b4 [ 122.419142][ T6330] vfs_get_tree+0x90/0x274 [ 122.419883][ T6330] do_new_mount+0x228/0x810 [ 122.420642][ T6330] path_mount+0x5bc/0x1008 [ 122.421358][ T6330] __arm64_sys_mount+0x514/0x5f0 [ 122.422156][ T6330] invoke_syscall+0x98/0x2b0 [ 122.422952][ T6330] el0_svc_common+0x138/0x258 [ 122.423789][ T6330] do_el0_svc+0x58/0x13c [ 122.424546][ T6330] el0_svc+0x78/0x1d0 [ 122.425221][ T6330] el0t_64_sync_handler+0xcc/0xe4 [ 122.426053][ T6330] el0t_64_sync+0x1a0/0x1a4 [ 122.432575][ T6332] syz.0.403 (6332): drop_caches: 2 [ 122.464506][ T6334] syz.2.405 (6334): drop_caches: 2 [ 122.468360][ T6330] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 122.470618][ T6330] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 122.477518][ T6330] syz.1.404 (6330): drop_caches: 2 [ 122.642686][ T6338] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 122.644008][ T6338] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 122.654137][ T6338] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 122.664593][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 122.665620][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 122.701078][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 35ms [ 122.702431][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 122.703518][ T6338] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 122.709508][ T6338] syz.4.407 (6338): drop_caches: 2 [ 122.835109][ T6336] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 122.836514][ T6336] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 122.839724][ T6344] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 122.840865][ T6344] CPU: 0 PID: 6344 Comm: syz.1.410 Not tainted syzkaller #0 [ 122.842142][ T6344] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 122.843817][ T6344] Call trace: [ 122.844370][ T6344] dump_backtrace+0x0/0x458 [ 122.845060][ T6344] show_stack+0x2c/0x3c [ 122.845732][ T6344] __dump_stack+0x30/0x40 [ 122.846451][ T6344] dump_stack_lvl+0xf4/0x15c [ 122.847198][ T6344] dump_stack+0x1c/0x5c [ 122.847920][ T6344] sysfs_create_dir_ns+0x244/0x264 [ 122.848800][ T6344] kobject_add_internal+0x5ac/0xc3c [ 122.849640][ T6344] kobject_init_and_add+0x124/0x190 [ 122.850451][ T6344] gfs2_sys_fs_add+0x200/0x41c [ 122.851237][ T6344] gfs2_fill_super+0xddc/0x1a18 [ 122.852112][ T6344] get_tree_bdev+0x358/0x544 [ 122.852882][ T6344] gfs2_get_tree+0x54/0x1b4 [ 122.853652][ T6344] vfs_get_tree+0x90/0x274 [ 122.854421][ T6344] do_new_mount+0x228/0x810 [ 122.855150][ T6344] path_mount+0x5bc/0x1008 [ 122.855815][ T6344] __arm64_sys_mount+0x514/0x5f0 [ 122.856574][ T6344] invoke_syscall+0x98/0x2b0 [ 122.857255][ T6344] el0_svc_common+0x138/0x258 [ 122.858002][ T6344] do_el0_svc+0x58/0x13c [ 122.858723][ T6344] el0_svc+0x78/0x1d0 [ 122.859521][ T6344] el0t_64_sync_handler+0xcc/0xe4 [ 122.860448][ T6344] el0t_64_sync+0x1a0/0x1a4 [ 122.866713][ T6336] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 122.868912][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 122.869910][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 122.903552][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 33ms [ 122.905008][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 122.905930][ T6336] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 122.915308][ T6344] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 122.923623][ T6336] syz.3.406 (6336): drop_caches: 2 [ 122.931260][ T6344] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 122.969015][ T6340] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 122.970437][ T6340] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 122.982985][ T6340] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 122.997294][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 122.998502][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.039296][ T6344] syz.1.410 (6344): drop_caches: 2 [ 123.056022][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 57ms [ 123.058893][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.059803][ T6340] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.065150][ T6340] syz.0.408 (6340): drop_caches: 2 [ 123.119278][ T6342] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 123.120498][ T6342] CPU: 1 PID: 6342 Comm: syz.2.409 Not tainted syzkaller #0 [ 123.121728][ T6342] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 123.123313][ T6342] Call trace: [ 123.123826][ T6342] dump_backtrace+0x0/0x458 [ 123.124556][ T6342] show_stack+0x2c/0x3c [ 123.125324][ T6342] __dump_stack+0x30/0x40 [ 123.126058][ T6342] dump_stack_lvl+0xf4/0x15c [ 123.126821][ T6342] dump_stack+0x1c/0x5c [ 123.127515][ T6342] sysfs_create_dir_ns+0x244/0x264 [ 123.128337][ T6342] kobject_add_internal+0x5ac/0xc3c [ 123.129177][ T6342] kobject_init_and_add+0x124/0x190 [ 123.130020][ T6342] gfs2_sys_fs_add+0x200/0x41c [ 123.130769][ T6342] gfs2_fill_super+0xddc/0x1a18 [ 123.131573][ T6342] get_tree_bdev+0x358/0x544 [ 123.132323][ T6342] gfs2_get_tree+0x54/0x1b4 [ 123.133025][ T6342] vfs_get_tree+0x90/0x274 [ 123.133709][ T6342] do_new_mount+0x228/0x810 [ 123.134421][ T6342] path_mount+0x5bc/0x1008 [ 123.135096][ T6342] __arm64_sys_mount+0x514/0x5f0 [ 123.135810][ T6342] invoke_syscall+0x98/0x2b0 [ 123.136574][ T6342] el0_svc_common+0x138/0x258 [ 123.137358][ T6342] do_el0_svc+0x58/0x13c [ 123.138029][ T6342] el0_svc+0x78/0x1d0 [ 123.138725][ T6342] el0t_64_sync_handler+0xcc/0xe4 [ 123.139603][ T6342] el0t_64_sync+0x1a0/0x1a4 [ 123.153862][ T6342] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 123.155908][ T6342] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 123.159833][ T6342] syz.2.409 (6342): drop_caches: 2 [ 123.171976][ T6346] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 123.173205][ T6346] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 123.175883][ T6346] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 123.179348][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 123.180402][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.225984][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 45ms [ 123.227326][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.228426][ T6346] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.234521][ T6346] syz.4.411 (6346): drop_caches: 2 1970/01/01 00:02:03 executed programs: 410 [ 123.359447][ T6350] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 123.360864][ T6350] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 123.364508][ T6350] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 123.368882][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 123.369947][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.396534][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 123.397934][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.398742][ T6350] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.403684][ T6350] syz.1.413 (6350): drop_caches: 2 [ 123.511859][ T6348] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 123.513194][ T6348] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 123.516357][ T6348] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 123.522837][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 123.523992][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.556068][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 32ms [ 123.560660][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.561507][ T6348] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.567185][ T6348] syz.3.412 (6348): drop_caches: 2 [ 123.621172][ T6352] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 123.622528][ T6352] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 123.635045][ T6352] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 123.636935][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 123.638116][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.675927][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 37ms [ 123.677246][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.687608][ T6352] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.692882][ T6352] syz.2.415 (6352): drop_caches: 2 [ 123.831225][ T6356] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 123.831243][ T6354] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 123.832482][ T6356] CPU: 0 PID: 6356 Comm: syz.4.416 Not tainted syzkaller #0 [ 123.833872][ T6354] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 123.834977][ T6356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 123.837728][ T6356] Call trace: [ 123.838272][ T6356] dump_backtrace+0x0/0x458 [ 123.839060][ T6356] show_stack+0x2c/0x3c [ 123.839773][ T6356] __dump_stack+0x30/0x40 [ 123.840548][ T6356] dump_stack_lvl+0xf4/0x15c [ 123.841328][ T6356] dump_stack+0x1c/0x5c [ 123.841995][ T6356] sysfs_create_dir_ns+0x244/0x264 [ 123.842817][ T6356] kobject_add_internal+0x5ac/0xc3c [ 123.843671][ T6356] kobject_init_and_add+0x124/0x190 [ 123.844532][ T6356] gfs2_sys_fs_add+0x200/0x41c [ 123.845296][ T6356] gfs2_fill_super+0xddc/0x1a18 [ 123.846098][ T6356] get_tree_bdev+0x358/0x544 [ 123.846903][ T6356] gfs2_get_tree+0x54/0x1b4 [ 123.846953][ T6354] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 123.847663][ T6356] vfs_get_tree+0x90/0x274 [ 123.847682][ T6356] do_new_mount+0x228/0x810 [ 123.847691][ T6356] path_mount+0x5bc/0x1008 [ 123.847699][ T6356] __arm64_sys_mount+0x514/0x5f0 [ 123.847706][ T6356] invoke_syscall+0x98/0x2b0 [ 123.847713][ T6356] el0_svc_common+0x138/0x258 [ 123.847720][ T6356] do_el0_svc+0x58/0x13c [ 123.847726][ T6356] el0_svc+0x78/0x1d0 [ 123.847732][ T6356] el0t_64_sync_handler+0xcc/0xe4 [ 123.855425][ T6356] el0t_64_sync+0x1a0/0x1a4 [ 123.858232][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 123.859254][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 123.884641][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 25ms [ 123.885963][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 123.886840][ T6354] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 123.892960][ T6354] syz.0.414 (6354): drop_caches: 2 [ 123.910218][ T6356] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 123.912601][ T6356] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 123.926309][ T6356] syz.4.416 (6356): drop_caches: 2 [ 123.931116][ T6358] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 123.932525][ T6358] CPU: 0 PID: 6358 Comm: syz.1.417 Not tainted syzkaller #0 [ 123.933661][ T6358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 123.935203][ T6358] Call trace: [ 123.935719][ T6358] dump_backtrace+0x0/0x458 [ 123.936445][ T6358] show_stack+0x2c/0x3c [ 123.937098][ T6358] __dump_stack+0x30/0x40 [ 123.937774][ T6358] dump_stack_lvl+0xf4/0x15c [ 123.938531][ T6358] dump_stack+0x1c/0x5c [ 123.939235][ T6358] sysfs_create_dir_ns+0x244/0x264 [ 123.940088][ T6358] kobject_add_internal+0x5ac/0xc3c [ 123.940934][ T6358] kobject_init_and_add+0x124/0x190 [ 123.941779][ T6358] gfs2_sys_fs_add+0x200/0x41c [ 123.942544][ T6358] gfs2_fill_super+0xddc/0x1a18 [ 123.943384][ T6358] get_tree_bdev+0x358/0x544 [ 123.944120][ T6358] gfs2_get_tree+0x54/0x1b4 [ 123.944859][ T6358] vfs_get_tree+0x90/0x274 [ 123.945606][ T6358] do_new_mount+0x228/0x810 [ 123.946369][ T6358] path_mount+0x5bc/0x1008 [ 123.947130][ T6358] __arm64_sys_mount+0x514/0x5f0 [ 123.947961][ T6358] invoke_syscall+0x98/0x2b0 [ 123.948738][ T6358] el0_svc_common+0x138/0x258 [ 123.949468][ T6358] do_el0_svc+0x58/0x13c [ 123.950181][ T6358] el0_svc+0x78/0x1d0 [ 123.950796][ T6358] el0t_64_sync_handler+0xcc/0xe4 [ 123.951645][ T6358] el0t_64_sync+0x1a0/0x1a4 [ 124.027452][ T6358] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 124.029672][ T6358] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 124.039079][ T6358] syz.1.417 (6358): drop_caches: 2 [ 124.169086][ T6362] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 124.170428][ T6362] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 124.172443][ T6360] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 124.173704][ T6360] CPU: 0 PID: 6360 Comm: syz.3.418 Not tainted syzkaller #0 [ 124.173999][ T6362] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 124.174827][ T6360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 124.177752][ T6360] Call trace: [ 124.178342][ T6360] dump_backtrace+0x0/0x458 [ 124.179132][ T6360] show_stack+0x2c/0x3c [ 124.179824][ T6360] __dump_stack+0x30/0x40 [ 124.180578][ T6360] dump_stack_lvl+0xf4/0x15c [ 124.181410][ T6360] dump_stack+0x1c/0x5c [ 124.181873][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 124.182109][ T6360] sysfs_create_dir_ns+0x244/0x264 [ 124.183198][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 124.183918][ T6360] kobject_add_internal+0x5ac/0xc3c [ 124.185873][ T6360] kobject_init_and_add+0x124/0x190 [ 124.186740][ T6360] gfs2_sys_fs_add+0x200/0x41c [ 124.187532][ T6360] gfs2_fill_super+0xddc/0x1a18 [ 124.188327][ T6360] get_tree_bdev+0x358/0x544 [ 124.189044][ T6360] gfs2_get_tree+0x54/0x1b4 [ 124.189790][ T6360] vfs_get_tree+0x90/0x274 [ 124.190552][ T6360] do_new_mount+0x228/0x810 [ 124.191297][ T6360] path_mount+0x5bc/0x1008 [ 124.191984][ T6360] __arm64_sys_mount+0x514/0x5f0 [ 124.192709][ T6360] invoke_syscall+0x98/0x2b0 [ 124.193492][ T6360] el0_svc_common+0x138/0x258 [ 124.194198][ T6360] do_el0_svc+0x58/0x13c [ 124.194891][ T6360] el0_svc+0x78/0x1d0 [ 124.195522][ T6360] el0t_64_sync_handler+0xcc/0xe4 [ 124.196325][ T6360] el0t_64_sync+0x1a0/0x1a4 [ 124.224030][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 40ms [ 124.225419][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 124.226280][ T6362] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 124.233618][ T6362] syz.2.419 (6362): drop_caches: 2 [ 124.281211][ T6360] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 124.283503][ T6360] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 124.297924][ T6360] syz.3.418 (6360): drop_caches: 2 [ 124.429303][ T6366] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 124.430662][ T6366] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 124.433293][ T6366] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 124.435010][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 124.436112][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 124.476661][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 40ms [ 124.487799][ T6364] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 124.487829][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 124.488994][ T6364] CPU: 0 PID: 6364 Comm: syz.0.420 Not tainted syzkaller #0 [ 124.489010][ T6364] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 124.491303][ T6366] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 124.492677][ T6364] Call trace: [ 124.492685][ T6364] dump_backtrace+0x0/0x458 [ 124.495140][ T6364] show_stack+0x2c/0x3c [ 124.495762][ T6364] __dump_stack+0x30/0x40 [ 124.496406][ T6364] dump_stack_lvl+0xf4/0x15c [ 124.497145][ T6364] dump_stack+0x1c/0x5c [ 124.497874][ T6364] sysfs_create_dir_ns+0x244/0x264 [ 124.498241][ T6366] syz.4.421 (6366): drop_caches: 2 [ 124.498751][ T6364] kobject_add_internal+0x5ac/0xc3c [ 124.500355][ T6364] kobject_init_and_add+0x124/0x190 [ 124.501196][ T6364] gfs2_sys_fs_add+0x200/0x41c [ 124.502008][ T6364] gfs2_fill_super+0xddc/0x1a18 [ 124.502844][ T6364] get_tree_bdev+0x358/0x544 [ 124.503579][ T6364] gfs2_get_tree+0x54/0x1b4 [ 124.504339][ T6364] vfs_get_tree+0x90/0x274 [ 124.505033][ T6364] do_new_mount+0x228/0x810 [ 124.505768][ T6364] path_mount+0x5bc/0x1008 [ 124.506489][ T6364] __arm64_sys_mount+0x514/0x5f0 [ 124.507325][ T6364] invoke_syscall+0x98/0x2b0 [ 124.508053][ T6364] el0_svc_common+0x138/0x258 [ 124.508798][ T6364] do_el0_svc+0x58/0x13c [ 124.509479][ T6364] el0_svc+0x78/0x1d0 [ 124.510095][ T6364] el0t_64_sync_handler+0xcc/0xe4 [ 124.510852][ T6364] el0t_64_sync+0x1a0/0x1a4 [ 124.548884][ T6368] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 124.550163][ T6368] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 124.550891][ T6364] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 124.552815][ T6368] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 124.553391][ T6364] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 124.557230][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 124.558347][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 124.599005][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 40ms [ 124.600405][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 124.601345][ T6368] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 124.605161][ T6368] syz.1.422 (6368): drop_caches: 2 [ 124.611386][ T6364] syz.0.420 (6364): drop_caches: 2 [ 124.738052][ T6372] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 124.739389][ T6372] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 124.750318][ T6372] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 124.753897][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 124.754984][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 124.785902][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 30ms [ 124.788256][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 124.789178][ T6372] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 124.794346][ T6372] syz.2.423 (6372): drop_caches: 2 [ 124.918087][ T6370] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 124.919446][ T6370] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 124.929114][ T6370] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 124.940962][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 124.942031][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 124.971625][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 29ms [ 124.972911][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 124.973815][ T6370] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 124.982330][ T6370] syz.3.424 (6370): drop_caches: 2 [ 125.062544][ T6376] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.063836][ T6376] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.066443][ T6376] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.069971][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.071066][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.122217][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 51ms [ 125.128222][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.128744][ T6378] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 125.129209][ T6376] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 125.130362][ T6378] CPU: 0 PID: 6378 Comm: syz.4.425 Not tainted syzkaller #0 [ 125.132804][ T6378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 125.134494][ T6378] Call trace: [ 125.135004][ T6378] dump_backtrace+0x0/0x458 [ 125.135719][ T6378] show_stack+0x2c/0x3c [ 125.136453][ T6378] __dump_stack+0x30/0x40 [ 125.137202][ T6378] dump_stack_lvl+0xf4/0x15c [ 125.137977][ T6378] dump_stack+0x1c/0x5c [ 125.138677][ T6378] sysfs_create_dir_ns+0x244/0x264 [ 125.139474][ T6378] kobject_add_internal+0x5ac/0xc3c [ 125.140321][ T6378] kobject_init_and_add+0x124/0x190 [ 125.141202][ T6378] gfs2_sys_fs_add+0x200/0x41c [ 125.141946][ T6378] gfs2_fill_super+0xddc/0x1a18 [ 125.142738][ T6378] get_tree_bdev+0x358/0x544 [ 125.143514][ T6378] gfs2_get_tree+0x54/0x1b4 [ 125.144289][ T6378] vfs_get_tree+0x90/0x274 [ 125.145050][ T6378] do_new_mount+0x228/0x810 [ 125.145714][ T6378] path_mount+0x5bc/0x1008 [ 125.146428][ T6378] __arm64_sys_mount+0x514/0x5f0 [ 125.147224][ T6378] invoke_syscall+0x98/0x2b0 [ 125.147970][ T6378] el0_svc_common+0x138/0x258 [ 125.148783][ T6378] do_el0_svc+0x58/0x13c [ 125.149502][ T6378] el0_svc+0x78/0x1d0 [ 125.150134][ T6378] el0t_64_sync_handler+0xcc/0xe4 [ 125.150938][ T6378] el0t_64_sync+0x1a0/0x1a4 [ 125.154289][ T6376] syz.1.426 (6376): drop_caches: 2 [ 125.207524][ T6378] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 125.209732][ T6378] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 125.210270][ T6374] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.212294][ T6378] syz.4.425 (6378): drop_caches: 2 [ 125.212344][ T6374] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.215952][ T6374] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.225268][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.226439][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.265417][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 125.266752][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.267987][ T6374] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 125.273241][ T6374] syz.0.427 (6374): drop_caches: 2 [ 125.359818][ T6380] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.361255][ T6380] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.363907][ T6380] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.371284][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.372378][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.420463][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 48ms [ 125.421749][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.422651][ T6380] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 125.426520][ T6380] syz.2.428 (6380): drop_caches: 2 [ 125.509777][ T6382] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.511178][ T6382] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.518701][ T6382] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.531449][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.532515][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.583622][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 51ms [ 125.585325][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.586204][ T6382] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 125.591707][ T6382] syz.3.429 (6382): drop_caches: 2 [ 125.701365][ T6384] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.702788][ T6384] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.705849][ T6384] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.708192][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.709331][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.760164][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 50ms [ 125.761445][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.762329][ T6384] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 125.766366][ T6384] syz.4.431 (6384): drop_caches: 2 [ 125.812033][ T6387] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 125.813274][ T6387] CPU: 0 PID: 6387 Comm: syz.0.432 Not tainted syzkaller #0 [ 125.814367][ T6387] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 125.816148][ T6387] Call trace: [ 125.816685][ T6387] dump_backtrace+0x0/0x458 [ 125.817450][ T6387] show_stack+0x2c/0x3c [ 125.818158][ T6387] __dump_stack+0x30/0x40 [ 125.818893][ T6387] dump_stack_lvl+0xf4/0x15c [ 125.819649][ T6387] dump_stack+0x1c/0x5c [ 125.820312][ T6387] sysfs_create_dir_ns+0x244/0x264 [ 125.821183][ T6387] kobject_add_internal+0x5ac/0xc3c [ 125.822160][ T6387] kobject_init_and_add+0x124/0x190 [ 125.823016][ T6387] gfs2_sys_fs_add+0x200/0x41c [ 125.823835][ T6387] gfs2_fill_super+0xddc/0x1a18 [ 125.824639][ T6387] get_tree_bdev+0x358/0x544 [ 125.825431][ T6387] gfs2_get_tree+0x54/0x1b4 [ 125.826231][ T6387] vfs_get_tree+0x90/0x274 [ 125.827001][ T6387] do_new_mount+0x228/0x810 [ 125.827750][ T6387] path_mount+0x5bc/0x1008 [ 125.828521][ T6387] __arm64_sys_mount+0x514/0x5f0 [ 125.829380][ T6387] invoke_syscall+0x98/0x2b0 [ 125.830180][ T6387] el0_svc_common+0x138/0x258 [ 125.830952][ T6387] do_el0_svc+0x58/0x13c [ 125.831634][ T6387] el0_svc+0x78/0x1d0 [ 125.832281][ T6387] el0t_64_sync_handler+0xcc/0xe4 [ 125.833099][ T6387] el0t_64_sync+0x1a0/0x1a4 [ 125.869646][ T6387] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 125.871750][ T6387] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 125.911852][ T6387] syz.0.432 (6387): drop_caches: 2 [ 125.921300][ T6390] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 125.921638][ T6388] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 125.922557][ T6390] CPU: 1 PID: 6390 Comm: syz.2.433 Not tainted syzkaller #0 [ 125.923949][ T6388] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 125.925042][ T6390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 125.927592][ T6390] Call trace: [ 125.928122][ T6390] dump_backtrace+0x0/0x458 [ 125.928832][ T6390] show_stack+0x2c/0x3c [ 125.929471][ T6390] __dump_stack+0x30/0x40 [ 125.930085][ T6390] dump_stack_lvl+0xf4/0x15c [ 125.930723][ T6390] dump_stack+0x1c/0x5c [ 125.931360][ T6390] sysfs_create_dir_ns+0x244/0x264 [ 125.932134][ T6390] kobject_add_internal+0x5ac/0xc3c [ 125.932982][ T6390] kobject_init_and_add+0x124/0x190 [ 125.933824][ T6390] gfs2_sys_fs_add+0x200/0x41c [ 125.934596][ T6390] gfs2_fill_super+0xddc/0x1a18 [ 125.935372][ T6390] get_tree_bdev+0x358/0x544 [ 125.936085][ T6390] gfs2_get_tree+0x54/0x1b4 [ 125.936743][ T6390] vfs_get_tree+0x90/0x274 [ 125.937403][ T6390] do_new_mount+0x228/0x810 [ 125.938215][ T6390] path_mount+0x5bc/0x1008 [ 125.938938][ T6390] __arm64_sys_mount+0x514/0x5f0 [ 125.939676][ T6390] invoke_syscall+0x98/0x2b0 [ 125.940338][ T6390] el0_svc_common+0x138/0x258 [ 125.941002][ T6390] do_el0_svc+0x58/0x13c [ 125.941724][ T6390] el0_svc+0x78/0x1d0 [ 125.942308][ T6390] el0t_64_sync_handler+0xcc/0xe4 [ 125.943066][ T6390] el0t_64_sync+0x1a0/0x1a4 [ 125.946883][ T6388] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 125.952173][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 125.953172][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 125.987077][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 33ms [ 125.996137][ T6390] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 125.997729][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 125.999408][ T6388] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 126.004083][ T6388] syz.1.430 (6388): drop_caches: 2 [ 126.007078][ T6390] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 126.017856][ T6390] syz.2.433 (6390): drop_caches: 2 [ 126.082889][ T6392] set_capacity_and_notify: 31 callbacks suppressed [ 126.082900][ T6392] loop3: detected capacity change from 0 to 32768 [ 126.090827][ T6392] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 126.092135][ T6392] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 126.094855][ T6392] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 126.099402][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 126.100615][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 126.132499][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 31ms [ 126.133828][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 126.134756][ T6392] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 126.139831][ T6392] syz.3.434 (6392): drop_caches: 2 [ 126.366446][ T6394] syz.4.435 (6394): drop_caches: 2 [ 126.392814][ T6396] loop0: detected capacity change from 0 to 32768 [ 126.439137][ T6396] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 126.440506][ T6396] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 126.447553][ T6396] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 126.449395][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 126.450441][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 126.479220][ T6398] loop2: detected capacity change from 0 to 32768 [ 126.483290][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 32ms [ 126.485142][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 126.485999][ T6396] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 126.490313][ T6396] syz.0.436 (6396): drop_caches: 2 [ 126.509293][ T6400] loop1: detected capacity change from 0 to 32768 [ 126.512922][ T6400] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 126.514070][ T6400] CPU: 0 PID: 6400 Comm: syz.1.437 Not tainted syzkaller #0 [ 126.515242][ T6400] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 126.516985][ T6400] Call trace: [ 126.517542][ T6400] dump_backtrace+0x0/0x458 [ 126.518344][ T6400] show_stack+0x2c/0x3c [ 126.519080][ T6400] __dump_stack+0x30/0x40 [ 126.519794][ T6400] dump_stack_lvl+0xf4/0x15c [ 126.520563][ T6400] dump_stack+0x1c/0x5c [ 126.521287][ T6400] sysfs_create_dir_ns+0x244/0x264 [ 126.522104][ T6400] kobject_add_internal+0x5ac/0xc3c [ 126.522959][ T6400] kobject_init_and_add+0x124/0x190 [ 126.523859][ T6400] gfs2_sys_fs_add+0x200/0x41c [ 126.524646][ T6400] gfs2_fill_super+0xddc/0x1a18 [ 126.525479][ T6400] get_tree_bdev+0x358/0x544 [ 126.526240][ T6400] gfs2_get_tree+0x54/0x1b4 [ 126.527017][ T6400] vfs_get_tree+0x90/0x274 [ 126.527795][ T6400] do_new_mount+0x228/0x810 [ 126.528485][ T6400] path_mount+0x5bc/0x1008 [ 126.529253][ T6400] __arm64_sys_mount+0x514/0x5f0 [ 126.530111][ T6400] invoke_syscall+0x98/0x2b0 [ 126.530880][ T6400] el0_svc_common+0x138/0x258 [ 126.531624][ T6400] do_el0_svc+0x58/0x13c [ 126.532312][ T6400] el0_svc+0x78/0x1d0 [ 126.532938][ T6400] el0t_64_sync_handler+0xcc/0xe4 [ 126.533747][ T6400] el0t_64_sync+0x1a0/0x1a4 [ 126.577485][ T6400] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 126.579759][ T6400] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 126.582437][ T6400] syz.1.437 (6400): drop_caches: 2 [ 126.600300][ T6398] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 126.601616][ T6398] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 126.604386][ T6398] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 126.606769][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 126.607942][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 126.613858][ T6404] loop4: detected capacity change from 0 to 32768 [ 126.636684][ T6402] loop3: detected capacity change from 0 to 32768 [ 126.646320][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 126.651353][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 126.652209][ T6398] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 126.656828][ T6398] syz.2.438 (6398): drop_caches: 2 [ 126.669770][ T6404] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 126.670961][ T6404] CPU: 1 PID: 6404 Comm: syz.4.440 Not tainted syzkaller #0 [ 126.672204][ T6404] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 126.673839][ T6404] Call trace: [ 126.674326][ T6404] dump_backtrace+0x0/0x458 [ 126.675065][ T6404] show_stack+0x2c/0x3c [ 126.675825][ T6404] __dump_stack+0x30/0x40 [ 126.676591][ T6404] dump_stack_lvl+0xf4/0x15c [ 126.677402][ T6404] dump_stack+0x1c/0x5c [ 126.678110][ T6404] sysfs_create_dir_ns+0x244/0x264 [ 126.678922][ T6404] kobject_add_internal+0x5ac/0xc3c [ 126.679726][ T6404] kobject_init_and_add+0x124/0x190 [ 126.680535][ T6404] gfs2_sys_fs_add+0x200/0x41c [ 126.681384][ T6404] gfs2_fill_super+0xddc/0x1a18 [ 126.682234][ T6404] get_tree_bdev+0x358/0x544 [ 126.683022][ T6404] gfs2_get_tree+0x54/0x1b4 [ 126.683832][ T6404] vfs_get_tree+0x90/0x274 [ 126.684573][ T6404] do_new_mount+0x228/0x810 [ 126.685340][ T6404] path_mount+0x5bc/0x1008 [ 126.686107][ T6404] __arm64_sys_mount+0x514/0x5f0 [ 126.687026][ T6404] invoke_syscall+0x98/0x2b0 [ 126.687845][ T6404] el0_svc_common+0x138/0x258 [ 126.688655][ T6404] do_el0_svc+0x58/0x13c [ 126.689364][ T6404] el0_svc+0x78/0x1d0 [ 126.690002][ T6404] el0t_64_sync_handler+0xcc/0xe4 [ 126.690867][ T6404] el0t_64_sync+0x1a0/0x1a4 [ 126.705090][ T6402] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 126.706478][ T6402] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 126.711801][ T6402] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 126.718299][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 126.719334][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 126.742648][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 126.743970][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 126.744962][ T6402] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 126.753403][ T6402] syz.3.439 (6402): drop_caches: 2 [ 126.767493][ T6404] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 126.769557][ T6404] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 126.820519][ T6404] syz.4.440 (6404): drop_caches: 2 [ 126.985221][ T6408] loop2: detected capacity change from 0 to 32768 [ 127.029859][ T6408] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.031246][ T6408] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.038718][ T6408] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.047261][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.048617][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.085701][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 37ms [ 127.087056][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 127.092596][ T6406] loop1: detected capacity change from 0 to 32768 [ 127.094860][ T6408] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 127.099230][ T6408] syz.2.443 (6408): drop_caches: 2 [ 127.140124][ T6406] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.141453][ T6406] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.144165][ T6406] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.145925][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.147020][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.178620][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 31ms [ 127.179904][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 127.197418][ T6406] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 127.203268][ T6406] syz.1.442 (6406): drop_caches: 2 [ 127.221248][ T6414] loop4: detected capacity change from 0 to 32768 [ 127.261890][ T6412] loop3: detected capacity change from 0 to 32768 [ 127.270014][ T6414] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.271269][ T6414] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.273962][ T6414] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.278268][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.279249][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.298491][ T6412] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 127.299711][ T6412] CPU: 1 PID: 6412 Comm: syz.3.444 Not tainted syzkaller #0 [ 127.301072][ T6412] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 127.302786][ T6412] Call trace: [ 127.303348][ T6412] dump_backtrace+0x0/0x458 [ 127.304045][ T6412] show_stack+0x2c/0x3c [ 127.304764][ T6412] __dump_stack+0x30/0x40 [ 127.305482][ T6412] dump_stack_lvl+0xf4/0x15c [ 127.306234][ T6412] dump_stack+0x1c/0x5c [ 127.306895][ T6412] sysfs_create_dir_ns+0x244/0x264 [ 127.307539][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 127.307742][ T6412] kobject_add_internal+0x5ac/0xc3c [ 127.309061][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 127.309754][ T6412] kobject_init_and_add+0x124/0x190 [ 127.311448][ T6412] gfs2_sys_fs_add+0x200/0x41c [ 127.312200][ T6412] gfs2_fill_super+0xddc/0x1a18 [ 127.312984][ T6412] get_tree_bdev+0x358/0x544 [ 127.313700][ T6412] gfs2_get_tree+0x54/0x1b4 [ 127.314121][ T6414] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 127.314485][ T6412] vfs_get_tree+0x90/0x274 [ 127.316378][ T6412] do_new_mount+0x228/0x810 [ 127.317124][ T6412] path_mount+0x5bc/0x1008 [ 127.317797][ T6412] __arm64_sys_mount+0x514/0x5f0 [ 127.318604][ T6412] invoke_syscall+0x98/0x2b0 [ 127.319383][ T6412] el0_svc_common+0x138/0x258 [ 127.320216][ T6412] do_el0_svc+0x58/0x13c [ 127.320929][ T6412] el0_svc+0x78/0x1d0 [ 127.321600][ T6412] el0t_64_sync_handler+0xcc/0xe4 [ 127.322431][ T6412] el0t_64_sync+0x1a0/0x1a4 [ 127.331079][ T6414] syz.4.445 (6414): drop_caches: 2 [ 127.332755][ T6410] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 127.333893][ T6410] CPU: 0 PID: 6410 Comm: syz.0.441 Not tainted syzkaller #0 [ 127.335149][ T6410] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 127.336790][ T6410] Call trace: [ 127.337328][ T6410] dump_backtrace+0x0/0x458 [ 127.338041][ T6410] show_stack+0x2c/0x3c [ 127.338726][ T6410] __dump_stack+0x30/0x40 [ 127.339452][ T6410] dump_stack_lvl+0xf4/0x15c [ 127.340190][ T6410] dump_stack+0x1c/0x5c [ 127.340805][ T6410] sysfs_create_dir_ns+0x244/0x264 [ 127.341563][ T6410] kobject_add_internal+0x5ac/0xc3c [ 127.342448][ T6410] kobject_init_and_add+0x124/0x190 [ 127.343323][ T6410] gfs2_sys_fs_add+0x200/0x41c [ 127.344141][ T6410] gfs2_fill_super+0xddc/0x1a18 [ 127.344961][ T6410] get_tree_bdev+0x358/0x544 [ 127.345757][ T6410] gfs2_get_tree+0x54/0x1b4 [ 127.346556][ T6410] vfs_get_tree+0x90/0x274 [ 127.347277][ T6410] do_new_mount+0x228/0x810 [ 127.348083][ T6410] path_mount+0x5bc/0x1008 [ 127.348877][ T6410] __arm64_sys_mount+0x514/0x5f0 [ 127.349728][ T6410] invoke_syscall+0x98/0x2b0 [ 127.350462][ T6410] el0_svc_common+0x138/0x258 [ 127.351247][ T6410] do_el0_svc+0x58/0x13c [ 127.351986][ T6410] el0_svc+0x78/0x1d0 [ 127.352643][ T6410] el0t_64_sync_handler+0xcc/0xe4 [ 127.353474][ T6410] el0t_64_sync+0x1a0/0x1a4 [ 127.378265][ T6412] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 127.378448][ T6410] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 127.380622][ T6412] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 127.385297][ T6410] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 127.386114][ T6412] syz.3.444 (6412): drop_caches: 2 [ 127.552839][ T6410] syz.0.441 (6410): drop_caches: 2 [ 127.661334][ T6416] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.662755][ T6416] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.669312][ T6416] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.671292][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.672399][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.715019][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 127.716274][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 127.727665][ T6416] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 127.732485][ T6416] syz.2.446 (6416): drop_caches: 2 [ 127.809225][ T6418] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.810655][ T6418] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.817796][ T6418] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.828053][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.829144][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.855305][ T6421] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 127.856519][ T6421] CPU: 1 PID: 6421 Comm: syz.3.449 Not tainted syzkaller #0 [ 127.857719][ T6421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 127.859356][ T6421] Call trace: [ 127.859912][ T6421] dump_backtrace+0x0/0x458 [ 127.860632][ T6421] show_stack+0x2c/0x3c [ 127.861328][ T6421] __dump_stack+0x30/0x40 [ 127.862107][ T6421] dump_stack_lvl+0xf4/0x15c [ 127.862915][ T6421] dump_stack+0x1c/0x5c [ 127.863671][ T6421] sysfs_create_dir_ns+0x244/0x264 [ 127.864533][ T6421] kobject_add_internal+0x5ac/0xc3c [ 127.865444][ T6421] kobject_init_and_add+0x124/0x190 [ 127.866286][ T6421] gfs2_sys_fs_add+0x200/0x41c [ 127.867094][ T6421] gfs2_fill_super+0xddc/0x1a18 [ 127.867140][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 37ms [ 127.867930][ T6421] get_tree_bdev+0x358/0x544 [ 127.867946][ T6421] gfs2_get_tree+0x54/0x1b4 [ 127.867952][ T6421] vfs_get_tree+0x90/0x274 [ 127.869179][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 127.869905][ T6421] do_new_mount+0x228/0x810 [ 127.870688][ T6418] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 127.871381][ T6421] path_mount+0x5bc/0x1008 [ 127.874845][ T6421] __arm64_sys_mount+0x514/0x5f0 [ 127.875604][ T6421] invoke_syscall+0x98/0x2b0 [ 127.876314][ T6421] el0_svc_common+0x138/0x258 [ 127.877036][ T6421] do_el0_svc+0x58/0x13c [ 127.877706][ T6421] el0_svc+0x78/0x1d0 [ 127.878292][ T6421] el0t_64_sync_handler+0xcc/0xe4 [ 127.879066][ T6421] el0t_64_sync+0x1a0/0x1a4 [ 127.887278][ T6418] syz.1.447 (6418): drop_caches: 2 [ 127.924614][ T6421] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 127.934456][ T6422] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 127.935814][ T6422] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 127.941759][ T6422] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 127.944658][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 127.945743][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 127.976566][ T6421] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 127.991213][ T6421] syz.3.449 (6421): drop_caches: 2 [ 128.007560][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 61ms [ 128.009468][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.010401][ T6422] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.014629][ T6422] syz.4.448 (6422): drop_caches: 2 [ 128.039070][ T6424] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 128.040496][ T6424] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 128.043392][ T6424] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 128.045225][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 128.046320][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 128.107683][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 61ms [ 128.108986][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.109882][ T6424] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.113851][ T6424] syz.0.450 (6424): drop_caches: 2 [ 128.278495][ T6426] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 128.279867][ T6426] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 128.286947][ T6426] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 128.300838][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 128.301922][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 128.339042][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 37ms [ 128.340333][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.342635][ T6426] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.355175][ T6426] syz.2.451 (6426): drop_caches: 2 1970/01/01 00:02:08 executed programs: 450 [ 128.449067][ T6428] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 128.450415][ T6428] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 128.453181][ T6428] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 128.467480][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 128.468623][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 128.481729][ T6432] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 128.482991][ T6432] CPU: 1 PID: 6432 Comm: syz.4.454 Not tainted syzkaller #0 [ 128.484175][ T6432] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 128.485843][ T6432] Call trace: [ 128.486339][ T6432] dump_backtrace+0x0/0x458 [ 128.487128][ T6432] show_stack+0x2c/0x3c [ 128.487826][ T6432] __dump_stack+0x30/0x40 [ 128.488512][ T6432] dump_stack_lvl+0xf4/0x15c [ 128.489324][ T6432] dump_stack+0x1c/0x5c [ 128.490047][ T6432] sysfs_create_dir_ns+0x244/0x264 [ 128.490909][ T6432] kobject_add_internal+0x5ac/0xc3c [ 128.491900][ T6432] kobject_init_and_add+0x124/0x190 [ 128.492812][ T6432] gfs2_sys_fs_add+0x200/0x41c [ 128.493664][ T6432] gfs2_fill_super+0xddc/0x1a18 [ 128.494446][ T6432] get_tree_bdev+0x358/0x544 [ 128.495252][ T6432] gfs2_get_tree+0x54/0x1b4 [ 128.495895][ T6432] vfs_get_tree+0x90/0x274 [ 128.496580][ T6432] do_new_mount+0x228/0x810 [ 128.497303][ T6432] path_mount+0x5bc/0x1008 [ 128.498030][ T6432] __arm64_sys_mount+0x514/0x5f0 [ 128.498789][ T6432] invoke_syscall+0x98/0x2b0 [ 128.499526][ T6432] el0_svc_common+0x138/0x258 [ 128.500225][ T6432] do_el0_svc+0x58/0x13c [ 128.500873][ T6432] el0_svc+0x78/0x1d0 [ 128.501575][ T6432] el0t_64_sync_handler+0xcc/0xe4 [ 128.502356][ T6432] el0t_64_sync+0x1a0/0x1a4 [ 128.507192][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 128.509184][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.510013][ T6428] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.522339][ T6428] syz.1.452 (6428): drop_caches: 2 [ 128.527812][ T6430] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 128.528967][ T6430] CPU: 0 PID: 6430 Comm: syz.3.453 Not tainted syzkaller #0 [ 128.530189][ T6430] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 128.531857][ T6430] Call trace: [ 128.532309][ T6430] dump_backtrace+0x0/0x458 [ 128.533037][ T6430] show_stack+0x2c/0x3c [ 128.533751][ T6430] __dump_stack+0x30/0x40 [ 128.534482][ T6430] dump_stack_lvl+0xf4/0x15c [ 128.535218][ T6430] dump_stack+0x1c/0x5c [ 128.535932][ T6430] sysfs_create_dir_ns+0x244/0x264 [ 128.536779][ T6430] kobject_add_internal+0x5ac/0xc3c [ 128.537619][ T6430] kobject_init_and_add+0x124/0x190 [ 128.538493][ T6430] gfs2_sys_fs_add+0x200/0x41c [ 128.539348][ T6430] gfs2_fill_super+0xddc/0x1a18 [ 128.540173][ T6430] get_tree_bdev+0x358/0x544 [ 128.540999][ T6430] gfs2_get_tree+0x54/0x1b4 [ 128.541731][ T6430] vfs_get_tree+0x90/0x274 [ 128.542438][ T6430] do_new_mount+0x228/0x810 [ 128.543162][ T6430] path_mount+0x5bc/0x1008 [ 128.543853][ T6430] __arm64_sys_mount+0x514/0x5f0 [ 128.544729][ T6430] invoke_syscall+0x98/0x2b0 [ 128.545535][ T6430] el0_svc_common+0x138/0x258 [ 128.546329][ T6430] do_el0_svc+0x58/0x13c [ 128.547031][ T6430] el0_svc+0x78/0x1d0 [ 128.547648][ T6430] el0t_64_sync_handler+0xcc/0xe4 [ 128.548539][ T6430] el0t_64_sync+0x1a0/0x1a4 [ 128.550692][ T6432] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 128.552732][ T6432] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 128.611848][ T6430] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 128.613992][ T6430] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 128.638872][ T6434] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 128.640146][ T6434] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 128.645936][ T6434] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 128.652008][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 128.653139][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 128.666301][ T6432] syz.4.454 (6432): drop_caches: 2 [ 128.682817][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 29ms [ 128.693597][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.695295][ T6434] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.703079][ T6434] syz.0.455 (6434): drop_caches: 2 [ 128.754196][ T6430] syz.3.453 (6430): drop_caches: 2 [ 128.779054][ T6436] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 128.780503][ T6436] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 128.783279][ T6436] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 128.786134][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 128.787300][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 128.842907][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 55ms [ 128.844324][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 128.845189][ T6436] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 128.854032][ T6436] syz.2.456 (6436): drop_caches: 2 [ 129.110036][ T6442] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 129.110335][ T6438] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 129.111399][ T6444] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 129.112712][ T6438] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 129.114061][ T6444] CPU: 0 PID: 6444 Comm: syz.3.460 Not tainted syzkaller #0 [ 129.116343][ T6444] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 129.118024][ T6444] Call trace: [ 129.118616][ T6444] dump_backtrace+0x0/0x458 [ 129.119356][ T6444] show_stack+0x2c/0x3c [ 129.120098][ T6444] __dump_stack+0x30/0x40 [ 129.120801][ T6444] dump_stack_lvl+0xf4/0x15c [ 129.121570][ T6444] dump_stack+0x1c/0x5c [ 129.122196][ T6444] sysfs_create_dir_ns+0x244/0x264 [ 129.122959][ T6444] kobject_add_internal+0x5ac/0xc3c [ 129.123735][ T6444] kobject_init_and_add+0x124/0x190 [ 129.124629][ T6444] gfs2_sys_fs_add+0x200/0x41c [ 129.125415][ T6444] gfs2_fill_super+0xddc/0x1a18 [ 129.126246][ T6444] get_tree_bdev+0x358/0x544 [ 129.126986][ T6444] gfs2_get_tree+0x54/0x1b4 [ 129.127778][ T6444] vfs_get_tree+0x90/0x274 [ 129.128555][ T6444] do_new_mount+0x228/0x810 [ 129.129340][ T6444] path_mount+0x5bc/0x1008 [ 129.130086][ T6444] __arm64_sys_mount+0x514/0x5f0 [ 129.130898][ T6444] invoke_syscall+0x98/0x2b0 [ 129.131611][ T6444] el0_svc_common+0x138/0x258 [ 129.132405][ T6444] do_el0_svc+0x58/0x13c [ 129.133120][ T6444] el0_svc+0x78/0x1d0 [ 129.133745][ T6444] el0t_64_sync_handler+0xcc/0xe4 [ 129.134626][ T6444] el0t_64_sync+0x1a0/0x1a4 [ 129.137828][ T6442] CPU: 0 PID: 6442 Comm: syz.0.459 Not tainted syzkaller #0 [ 129.138950][ T6442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 129.140363][ T6438] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 129.140647][ T6442] Call trace: [ 129.142392][ T6442] dump_backtrace+0x0/0x458 [ 129.142574][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 129.143169][ T6442] show_stack+0x2c/0x3c [ 129.144230][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 129.144859][ T6442] __dump_stack+0x30/0x40 [ 129.146529][ T6442] dump_stack_lvl+0xf4/0x15c [ 129.147235][ T6442] dump_stack+0x1c/0x5c [ 129.147929][ T6442] sysfs_create_dir_ns+0x244/0x264 [ 129.148824][ T6442] kobject_add_internal+0x5ac/0xc3c [ 129.149639][ T6442] kobject_init_and_add+0x124/0x190 [ 129.150566][ T6442] gfs2_sys_fs_add+0x200/0x41c [ 129.151344][ T6442] gfs2_fill_super+0xddc/0x1a18 [ 129.152131][ T6442] get_tree_bdev+0x358/0x544 [ 129.152851][ T6442] gfs2_get_tree+0x54/0x1b4 [ 129.153633][ T6442] vfs_get_tree+0x90/0x274 [ 129.154382][ T6442] do_new_mount+0x228/0x810 [ 129.155193][ T6442] path_mount+0x5bc/0x1008 [ 129.155936][ T6442] __arm64_sys_mount+0x514/0x5f0 [ 129.156718][ T6442] invoke_syscall+0x98/0x2b0 [ 129.157395][ T6442] el0_svc_common+0x138/0x258 [ 129.158128][ T6442] do_el0_svc+0x58/0x13c [ 129.158863][ T6442] el0_svc+0x78/0x1d0 [ 129.159468][ T6442] el0t_64_sync_handler+0xcc/0xe4 [ 129.160406][ T6442] el0t_64_sync+0x1a0/0x1a4 [ 129.162180][ T6440] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 129.164361][ T6440] CPU: 1 PID: 6440 Comm: syz.4.458 Not tainted syzkaller #0 [ 129.165534][ T6440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 129.167097][ T6440] Call trace: [ 129.167650][ T6440] dump_backtrace+0x0/0x458 [ 129.168398][ T6440] show_stack+0x2c/0x3c [ 129.169048][ T6440] __dump_stack+0x30/0x40 [ 129.169793][ T6440] dump_stack_lvl+0xf4/0x15c [ 129.170555][ T6440] dump_stack+0x1c/0x5c [ 129.171219][ T6440] sysfs_create_dir_ns+0x244/0x264 [ 129.171993][ T6440] kobject_add_internal+0x5ac/0xc3c [ 129.172945][ T6440] kobject_init_and_add+0x124/0x190 [ 129.173886][ T6440] gfs2_sys_fs_add+0x200/0x41c [ 129.174714][ T6440] gfs2_fill_super+0xddc/0x1a18 [ 129.175555][ T6440] get_tree_bdev+0x358/0x544 [ 129.176407][ T6440] gfs2_get_tree+0x54/0x1b4 [ 129.177156][ T6440] vfs_get_tree+0x90/0x274 [ 129.177922][ T6440] do_new_mount+0x228/0x810 [ 129.178700][ T6440] path_mount+0x5bc/0x1008 [ 129.179446][ T6440] __arm64_sys_mount+0x514/0x5f0 [ 129.180321][ T6440] invoke_syscall+0x98/0x2b0 [ 129.181036][ T6440] el0_svc_common+0x138/0x258 [ 129.181775][ T6440] do_el0_svc+0x58/0x13c [ 129.182534][ T6440] el0_svc+0x78/0x1d0 [ 129.183203][ T6440] el0t_64_sync_handler+0xcc/0xe4 [ 129.184040][ T6440] el0t_64_sync+0x1a0/0x1a4 [ 129.193772][ T6444] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 129.195940][ T6444] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 129.200096][ T6444] syz.3.460 (6444): drop_caches: 2 [ 129.206411][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 62ms [ 129.207713][ T6442] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 129.207736][ T6442] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 129.212056][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 129.212889][ T6438] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 129.218111][ T6438] syz.1.457 (6438): drop_caches: 2 [ 129.247425][ T6440] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 129.249649][ T6440] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 129.251588][ T6440] syz.4.458 (6440): drop_caches: 2 [ 129.351865][ T6442] syz.0.459 (6442): drop_caches: 2 [ 129.431293][ T6446] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 129.432796][ T6446] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 129.435600][ T6446] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 129.457811][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 129.459039][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 129.482992][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 129.484342][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 129.495461][ T6446] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 129.499915][ T6446] syz.2.461 (6446): drop_caches: 2 [ 129.689145][ T6448] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 129.690430][ T6448] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 129.693221][ T6448] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 129.695095][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 129.696218][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 129.728728][ T6450] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 129.729980][ T6450] CPU: 1 PID: 6450 Comm: syz.1.463 Not tainted syzkaller #0 [ 129.731169][ T6450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 129.732741][ T6450] Call trace: [ 129.733278][ T6450] dump_backtrace+0x0/0x458 [ 129.734004][ T6450] show_stack+0x2c/0x3c [ 129.734677][ T6450] __dump_stack+0x30/0x40 [ 129.735434][ T6450] dump_stack_lvl+0xf4/0x15c [ 129.736129][ T6450] dump_stack+0x1c/0x5c [ 129.736779][ T6450] sysfs_create_dir_ns+0x244/0x264 [ 129.737562][ T6450] kobject_add_internal+0x5ac/0xc3c [ 129.738508][ T6450] kobject_init_and_add+0x124/0x190 [ 129.739366][ T6450] gfs2_sys_fs_add+0x200/0x41c [ 129.740208][ T6450] gfs2_fill_super+0xddc/0x1a18 [ 129.741051][ T6450] get_tree_bdev+0x358/0x544 [ 129.741477][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 45ms [ 129.741838][ T6450] gfs2_get_tree+0x54/0x1b4 [ 129.743274][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 129.743960][ T6450] vfs_get_tree+0x90/0x274 [ 129.743975][ T6450] do_new_mount+0x228/0x810 [ 129.746093][ T6450] path_mount+0x5bc/0x1008 [ 129.746793][ T6450] __arm64_sys_mount+0x514/0x5f0 [ 129.747601][ T6450] invoke_syscall+0x98/0x2b0 [ 129.748347][ T6450] el0_svc_common+0x138/0x258 [ 129.749083][ T6450] do_el0_svc+0x58/0x13c [ 129.749772][ T6450] el0_svc+0x78/0x1d0 [ 129.750423][ T6450] el0t_64_sync_handler+0xcc/0xe4 [ 129.751272][ T6450] el0t_64_sync+0x1a0/0x1a4 [ 129.752571][ T6448] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 129.761404][ T6448] syz.3.462 (6448): drop_caches: 2 [ 129.797430][ T6450] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 129.799696][ T6450] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 129.820608][ T6450] syz.1.463 (6450): drop_caches: 2 [ 129.837777][ T6452] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 129.839207][ T6452] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 129.852383][ T6452] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 129.854183][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 129.855209][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 129.881587][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 129.883428][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 129.884293][ T6452] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 129.899526][ T6454] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 129.900777][ T6454] CPU: 0 PID: 6454 Comm: syz.0.465 Not tainted syzkaller #0 [ 129.902130][ T6454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 129.903819][ T6454] Call trace: [ 129.904403][ T6454] dump_backtrace+0x0/0x458 [ 129.905254][ T6454] show_stack+0x2c/0x3c [ 129.905959][ T6454] __dump_stack+0x30/0x40 [ 129.906661][ T6454] dump_stack_lvl+0xf4/0x15c [ 129.907446][ T6454] dump_stack+0x1c/0x5c [ 129.908144][ T6454] sysfs_create_dir_ns+0x244/0x264 [ 129.908961][ T6454] kobject_add_internal+0x5ac/0xc3c [ 129.909851][ T6454] kobject_init_and_add+0x124/0x190 [ 129.910784][ T6454] gfs2_sys_fs_add+0x200/0x41c [ 129.911566][ T6454] gfs2_fill_super+0xddc/0x1a18 [ 129.912374][ T6454] get_tree_bdev+0x358/0x544 [ 129.913138][ T6454] gfs2_get_tree+0x54/0x1b4 [ 129.913905][ T6454] vfs_get_tree+0x90/0x274 [ 129.914638][ T6454] do_new_mount+0x228/0x810 [ 129.915351][ T6454] path_mount+0x5bc/0x1008 [ 129.916031][ T6454] __arm64_sys_mount+0x514/0x5f0 [ 129.916869][ T6454] invoke_syscall+0x98/0x2b0 [ 129.917610][ T6454] el0_svc_common+0x138/0x258 [ 129.918432][ T6454] do_el0_svc+0x58/0x13c [ 129.919100][ T6454] el0_svc+0x78/0x1d0 [ 129.919750][ T6454] el0t_64_sync_handler+0xcc/0xe4 [ 129.920599][ T6454] el0t_64_sync+0x1a0/0x1a4 [ 129.924922][ T6452] syz.4.464 (6452): drop_caches: 2 [ 129.962222][ T6454] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 129.964448][ T6454] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 129.967304][ T6454] syz.0.465 (6454): drop_caches: 2 [ 129.972702][ T6456] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 129.974789][ T6456] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 129.979247][ T6456] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 129.981085][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 129.982109][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 130.044744][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 62ms [ 130.046132][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 130.046976][ T6456] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 130.058545][ T6456] syz.2.466 (6456): drop_caches: 2 [ 130.250933][ T6460] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 130.252369][ T6460] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 130.255165][ T6460] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 130.261484][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 130.262611][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 130.285270][ T6458] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 130.286459][ T6458] CPU: 1 PID: 6458 Comm: syz.1.468 Not tainted syzkaller #0 [ 130.287758][ T6458] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 130.289570][ T6458] Call trace: [ 130.290121][ T6458] dump_backtrace+0x0/0x458 [ 130.290866][ T6458] show_stack+0x2c/0x3c [ 130.291546][ T6458] __dump_stack+0x30/0x40 [ 130.292307][ T6458] dump_stack_lvl+0xf4/0x15c [ 130.293058][ T6458] dump_stack+0x1c/0x5c [ 130.293820][ T6458] sysfs_create_dir_ns+0x244/0x264 [ 130.294625][ T6458] kobject_add_internal+0x5ac/0xc3c [ 130.295568][ T6458] kobject_init_and_add+0x124/0x190 [ 130.296543][ T6458] gfs2_sys_fs_add+0x200/0x41c [ 130.297361][ T6458] gfs2_fill_super+0xddc/0x1a18 [ 130.298188][ T6458] get_tree_bdev+0x358/0x544 [ 130.299014][ T6458] gfs2_get_tree+0x54/0x1b4 [ 130.299772][ T6458] vfs_get_tree+0x90/0x274 [ 130.300533][ T6458] do_new_mount+0x228/0x810 [ 130.301307][ T6458] path_mount+0x5bc/0x1008 [ 130.302076][ T6458] __arm64_sys_mount+0x514/0x5f0 [ 130.302886][ T6458] invoke_syscall+0x98/0x2b0 [ 130.303680][ T6458] el0_svc_common+0x138/0x258 [ 130.304477][ T6458] do_el0_svc+0x58/0x13c [ 130.305174][ T6458] el0_svc+0x78/0x1d0 [ 130.305826][ T6458] el0t_64_sync_handler+0xcc/0xe4 [ 130.306699][ T6458] el0t_64_sync+0x1a0/0x1a4 [ 130.312927][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 50ms [ 130.314331][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 130.315318][ T6460] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 130.333080][ T6460] syz.3.467 (6460): drop_caches: 2 [ 130.377421][ T6458] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 130.379685][ T6458] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 130.479324][ T6464] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 130.479343][ T6462] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 130.480535][ T6464] CPU: 0 PID: 6464 Comm: syz.0.470 Not tainted syzkaller #0 [ 130.481899][ T6462] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 130.483130][ T6464] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 130.483143][ T6464] Call trace: [ 130.483147][ T6464] dump_backtrace+0x0/0x458 [ 130.487182][ T6464] show_stack+0x2c/0x3c [ 130.487883][ T6464] __dump_stack+0x30/0x40 [ 130.488665][ T6464] dump_stack_lvl+0xf4/0x15c [ 130.489454][ T6464] dump_stack+0x1c/0x5c [ 130.490158][ T6464] sysfs_create_dir_ns+0x244/0x264 [ 130.490164][ T6462] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 130.490175][ T6464] kobject_add_internal+0x5ac/0xc3c [ 130.491586][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 130.492271][ T6464] kobject_init_and_add+0x124/0x190 [ 130.493133][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 130.494269][ T6464] gfs2_sys_fs_add+0x200/0x41c [ 130.497021][ T6464] gfs2_fill_super+0xddc/0x1a18 [ 130.497790][ T6464] get_tree_bdev+0x358/0x544 [ 130.498601][ T6464] gfs2_get_tree+0x54/0x1b4 [ 130.499367][ T6464] vfs_get_tree+0x90/0x274 [ 130.500154][ T6464] do_new_mount+0x228/0x810 [ 130.500917][ T6464] path_mount+0x5bc/0x1008 [ 130.501708][ T6464] __arm64_sys_mount+0x514/0x5f0 [ 130.502585][ T6464] invoke_syscall+0x98/0x2b0 [ 130.503369][ T6464] el0_svc_common+0x138/0x258 [ 130.504191][ T6464] do_el0_svc+0x58/0x13c [ 130.504963][ T6464] el0_svc+0x78/0x1d0 [ 130.505608][ T6464] el0t_64_sync_handler+0xcc/0xe4 [ 130.506423][ T6464] el0t_64_sync+0x1a0/0x1a4 [ 130.508086][ T6464] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 130.510142][ T6464] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 130.520745][ T6466] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 130.521911][ T6466] CPU: 1 PID: 6466 Comm: syz.2.471 Not tainted syzkaller #0 [ 130.523142][ T6466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 130.524822][ T6466] Call trace: [ 130.525310][ T6466] dump_backtrace+0x0/0x458 [ 130.525938][ T6466] show_stack+0x2c/0x3c [ 130.526560][ T6466] __dump_stack+0x30/0x40 [ 130.527292][ T6466] dump_stack_lvl+0xf4/0x15c [ 130.528072][ T6466] dump_stack+0x1c/0x5c [ 130.528782][ T6466] sysfs_create_dir_ns+0x244/0x264 [ 130.529556][ T6466] kobject_add_internal+0x5ac/0xc3c [ 130.530370][ T6466] kobject_init_and_add+0x124/0x190 [ 130.531190][ T6466] gfs2_sys_fs_add+0x200/0x41c [ 130.531908][ T6466] gfs2_fill_super+0xddc/0x1a18 [ 130.532625][ T6466] get_tree_bdev+0x358/0x544 [ 130.533348][ T6466] gfs2_get_tree+0x54/0x1b4 [ 130.534053][ T6466] vfs_get_tree+0x90/0x274 [ 130.534715][ T6466] do_new_mount+0x228/0x810 [ 130.535387][ T6466] path_mount+0x5bc/0x1008 [ 130.536037][ T6466] __arm64_sys_mount+0x514/0x5f0 [ 130.536801][ T6466] invoke_syscall+0x98/0x2b0 [ 130.537506][ T6466] el0_svc_common+0x138/0x258 [ 130.538194][ T6466] do_el0_svc+0x58/0x13c [ 130.538846][ T6466] el0_svc+0x78/0x1d0 [ 130.539470][ T6466] el0t_64_sync_handler+0xcc/0xe4 [ 130.540221][ T6466] el0t_64_sync+0x1a0/0x1a4 [ 130.550671][ T6466] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 130.552715][ T6466] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 130.556984][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 63ms [ 130.571809][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 130.572625][ T6462] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 130.579635][ T6462] syz.4.469 (6462): drop_caches: 2 [ 130.600006][ T6464] syz.0.470 (6464): drop_caches: 2 [ 130.627209][ T6458] syz.1.468 (6458): drop_caches: 2 [ 130.630631][ T6466] syz.2.471 (6466): drop_caches: 2 [ 130.988856][ T6468] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 130.990380][ T6468] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 130.996193][ T6468] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 131.001799][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 131.002903][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 131.028624][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 25ms [ 131.028748][ T6476] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 131.029969][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 131.031034][ T6476] CPU: 1 PID: 6476 Comm: syz.4.473 Not tainted syzkaller #0 [ 131.031896][ T6468] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 131.033033][ T6476] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 131.033047][ T6476] Call trace: [ 131.036382][ T6476] dump_backtrace+0x0/0x458 [ 131.037166][ T6476] show_stack+0x2c/0x3c [ 131.037827][ T6476] __dump_stack+0x30/0x40 [ 131.038515][ T6476] dump_stack_lvl+0xf4/0x15c [ 131.039228][ T6476] dump_stack+0x1c/0x5c [ 131.039895][ T6476] sysfs_create_dir_ns+0x244/0x264 [ 131.040807][ T6476] kobject_add_internal+0x5ac/0xc3c [ 131.041672][ T6476] kobject_init_and_add+0x124/0x190 [ 131.042626][ T6476] gfs2_sys_fs_add+0x200/0x41c [ 131.043412][ T6476] gfs2_fill_super+0xddc/0x1a18 [ 131.044210][ T6476] get_tree_bdev+0x358/0x544 [ 131.044941][ T6476] gfs2_get_tree+0x54/0x1b4 [ 131.045653][ T6476] vfs_get_tree+0x90/0x274 [ 131.046373][ T6476] do_new_mount+0x228/0x810 [ 131.047138][ T6476] path_mount+0x5bc/0x1008 [ 131.047875][ T6476] __arm64_sys_mount+0x514/0x5f0 [ 131.048699][ T6476] invoke_syscall+0x98/0x2b0 [ 131.049432][ T6476] el0_svc_common+0x138/0x258 [ 131.050215][ T6476] do_el0_svc+0x58/0x13c [ 131.050862][ T6476] el0_svc+0x78/0x1d0 [ 131.051489][ T6476] el0t_64_sync_handler+0xcc/0xe4 [ 131.052223][ T6476] el0t_64_sync+0x1a0/0x1a4 [ 131.060037][ T6468] syz.3.472 (6468): drop_caches: 2 [ 131.086694][ T2064] ieee802154 phy0 wpan0: encryption failed: -22 [ 131.087809][ T2064] ieee802154 phy1 wpan1: encryption failed: -22 [ 131.094436][ T6476] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 131.096880][ T6476] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 131.098978][ T6470] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 131.100683][ T6470] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 131.103260][ T6470] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 131.109161][ T4162] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 131.110218][ T4162] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 131.128929][ T6474] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 131.130161][ T6474] CPU: 0 PID: 6474 Comm: syz.1.475 Not tainted syzkaller #0 [ 131.131327][ T6474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 131.132839][ T6474] Call trace: [ 131.133343][ T6474] dump_backtrace+0x0/0x458 [ 131.134033][ T6474] show_stack+0x2c/0x3c [ 131.134668][ T6474] __dump_stack+0x30/0x40 [ 131.135351][ T6474] dump_stack_lvl+0xf4/0x15c [ 131.136152][ T6474] dump_stack+0x1c/0x5c [ 131.136771][ T6474] sysfs_create_dir_ns+0x244/0x264 [ 131.137594][ T6474] kobject_add_internal+0x5ac/0xc3c [ 131.138550][ T6474] kobject_init_and_add+0x124/0x190 [ 131.139410][ T6474] gfs2_sys_fs_add+0x200/0x41c [ 131.140234][ T6474] gfs2_fill_super+0xddc/0x1a18 [ 131.141098][ T6474] get_tree_bdev+0x358/0x544 [ 131.141918][ T6474] gfs2_get_tree+0x54/0x1b4 [ 131.142749][ T6474] vfs_get_tree+0x90/0x274 [ 131.143473][ T6474] do_new_mount+0x228/0x810 [ 131.144229][ T6474] path_mount+0x5bc/0x1008 [ 131.144984][ T6474] __arm64_sys_mount+0x514/0x5f0 [ 131.145816][ T6474] invoke_syscall+0x98/0x2b0 [ 131.146599][ T6474] el0_svc_common+0x138/0x258 [ 131.147262][ T6473] set_capacity_and_notify: 31 callbacks suppressed [ 131.147269][ T6473] loop2: detected capacity change from 0 to 32768 [ 131.147373][ T6474] do_el0_svc+0x58/0x13c [ 131.147392][ T6474] el0_svc+0x78/0x1d0 [ 131.147401][ T6474] el0t_64_sync_handler+0xcc/0xe4 [ 131.147407][ T6474] el0t_64_sync+0x1a0/0x1a4 [ 131.167299][ T4162] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 57ms [ 131.177454][ T4162] gfs2: fsid=syz:syz.0: jid=0: Done [ 131.178365][ T6470] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 131.184194][ T6470] syz.0.474 (6470): drop_caches: 2 [ 131.191150][ T6474] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 131.193300][ T6474] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 131.198964][ T6473] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 131.200163][ T6473] CPU: 1 PID: 6473 Comm: syz.2.476 Not tainted syzkaller #0 [ 131.200968][ T6474] syz.1.475 (6474): drop_caches: 2 [ 131.201424][ T6473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 131.203869][ T6473] Call trace: [ 131.204428][ T6473] dump_backtrace+0x0/0x458 [ 131.205202][ T6473] show_stack+0x2c/0x3c [ 131.205906][ T6473] __dump_stack+0x30/0x40 [ 131.206658][ T6473] dump_stack_lvl+0xf4/0x15c [ 131.207460][ T6473] dump_stack+0x1c/0x5c [ 131.208095][ T6473] sysfs_create_dir_ns+0x244/0x264 [ 131.208909][ T6473] kobject_add_internal+0x5ac/0xc3c [ 131.209815][ T6473] kobject_init_and_add+0x124/0x190 [ 131.210689][ T6473] gfs2_sys_fs_add+0x200/0x41c [ 131.211515][ T6473] gfs2_fill_super+0xddc/0x1a18 [ 131.212303][ T6473] get_tree_bdev+0x358/0x544 [ 131.213086][ T6473] gfs2_get_tree+0x54/0x1b4 [ 131.213853][ T6473] vfs_get_tree+0x90/0x274 [ 131.214618][ T6473] do_new_mount+0x228/0x810 [ 131.215357][ T6473] path_mount+0x5bc/0x1008 [ 131.216110][ T6473] __arm64_sys_mount+0x514/0x5f0 [ 131.216910][ T6473] invoke_syscall+0x98/0x2b0 [ 131.217583][ T6473] el0_svc_common+0x138/0x258 [ 131.218345][ T6473] do_el0_svc+0x58/0x13c [ 131.219055][ T6473] el0_svc+0x78/0x1d0 [ 131.219706][ T6473] el0t_64_sync_handler+0xcc/0xe4 [ 131.220572][ T6473] el0t_64_sync+0x1a0/0x1a4 [ 131.307483][ T6473] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 131.309668][ T6473] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 131.322008][ T6473] syz.2.476 (6473): drop_caches: 2 [ 131.389100][ T6476] syz.4.473 (6476): drop_caches: 2 [ 131.586090][ T6478] loop3: detected capacity change from 0 to 32768 [ 131.642062][ T6478] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 131.643255][ T6478] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 131.645946][ T6478] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 131.653775][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 131.654887][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 131.688050][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 33ms [ 131.689320][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 131.690130][ T6478] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 131.694969][ T6478] syz.3.477 (6478): drop_caches: 2 [ 131.753926][ T6482] loop0: detected capacity change from 0 to 32768 [ 131.781492][ T6480] loop1: detected capacity change from 0 to 32768 [ 131.804104][ T6486] loop4: detected capacity change from 0 to 32768 [ 131.812808][ T6482] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 131.814080][ T6482] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 131.818368][ T6482] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 131.820358][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 131.821450][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 131.831161][ T6480] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 131.832387][ T6480] CPU: 0 PID: 6480 Comm: syz.1.479 Not tainted syzkaller #0 [ 131.833627][ T6480] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 131.835191][ T6480] Call trace: [ 131.835728][ T6480] dump_backtrace+0x0/0x458 [ 131.836517][ T6480] show_stack+0x2c/0x3c [ 131.837201][ T6480] __dump_stack+0x30/0x40 [ 131.837930][ T6480] dump_stack_lvl+0xf4/0x15c [ 131.838711][ T6480] dump_stack+0x1c/0x5c [ 131.839377][ T6480] sysfs_create_dir_ns+0x244/0x264 [ 131.840246][ T6480] kobject_add_internal+0x5ac/0xc3c [ 131.841202][ T6480] kobject_init_and_add+0x124/0x190 [ 131.842045][ T6480] gfs2_sys_fs_add+0x200/0x41c [ 131.842815][ T6480] gfs2_fill_super+0xddc/0x1a18 [ 131.843523][ T6480] get_tree_bdev+0x358/0x544 [ 131.844236][ T6480] gfs2_get_tree+0x54/0x1b4 [ 131.844956][ T6480] vfs_get_tree+0x90/0x274 [ 131.845685][ T6480] do_new_mount+0x228/0x810 [ 131.846388][ T6480] path_mount+0x5bc/0x1008 [ 131.847052][ T6480] __arm64_sys_mount+0x514/0x5f0 [ 131.847847][ T6480] invoke_syscall+0x98/0x2b0 [ 131.848579][ T6480] el0_svc_common+0x138/0x258 [ 131.849288][ T6480] do_el0_svc+0x58/0x13c [ 131.849967][ T6480] el0_svc+0x78/0x1d0 [ 131.850541][ T6480] el0t_64_sync_handler+0xcc/0xe4 [ 131.851390][ T6480] el0t_64_sync+0x1a0/0x1a4 [ 131.869862][ T6486] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 131.877418][ T6486] CPU: 1 PID: 6486 Comm: syz.4.481 Not tainted syzkaller #0 [ 131.878453][ T6486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 131.880201][ T6486] Call trace: [ 131.880740][ T6486] dump_backtrace+0x0/0x458 [ 131.881455][ T6486] show_stack+0x2c/0x3c [ 131.882127][ T6486] __dump_stack+0x30/0x40 [ 131.882840][ T6486] dump_stack_lvl+0xf4/0x15c [ 131.883627][ T6486] dump_stack+0x1c/0x5c [ 131.884296][ T6486] sysfs_create_dir_ns+0x244/0x264 [ 131.885161][ T6486] kobject_add_internal+0x5ac/0xc3c [ 131.886043][ T6486] kobject_init_and_add+0x124/0x190 [ 131.886876][ T6486] gfs2_sys_fs_add+0x200/0x41c [ 131.887606][ T6486] gfs2_fill_super+0xddc/0x1a18 [ 131.888339][ T6486] get_tree_bdev+0x358/0x544 [ 131.889045][ T6486] gfs2_get_tree+0x54/0x1b4 [ 131.889754][ T6486] vfs_get_tree+0x90/0x274 [ 131.890406][ T6486] do_new_mount+0x228/0x810 [ 131.891082][ T6486] path_mount+0x5bc/0x1008 [ 131.891758][ T6486] __arm64_sys_mount+0x514/0x5f0 [ 131.892496][ T6486] invoke_syscall+0x98/0x2b0 [ 131.893227][ T6486] el0_svc_common+0x138/0x258 [ 131.893977][ T6486] do_el0_svc+0x58/0x13c [ 131.894679][ T6486] el0_svc+0x78/0x1d0 [ 131.895264][ T6486] el0t_64_sync_handler+0xcc/0xe4 [ 131.895966][ T6486] el0t_64_sync+0x1a0/0x1a4 [ 131.898856][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 77ms [ 131.899709][ T6480] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 131.900097][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 131.902214][ T6480] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 131.903097][ T6482] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 131.908781][ T6482] syz.0.478 (6482): drop_caches: 2 [ 131.931057][ T6480] syz.1.479 (6480): drop_caches: 2 [ 131.948644][ T6484] syz.2.480 (6484): drop_caches: 2 [ 131.968154][ T6486] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 131.982284][ T6486] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 131.996548][ T6486] syz.4.481 (6486): drop_caches: 2 [ 132.265342][ T6488] loop3: detected capacity change from 0 to 32768 [ 132.288990][ T6488] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 132.290245][ T6488] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 132.304210][ T6488] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 132.305978][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 132.307075][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 132.354614][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 47ms [ 132.356516][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 132.357255][ T6488] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 132.362837][ T6488] syz.3.482 (6488): drop_caches: 2 [ 132.385845][ T6492] loop2: detected capacity change from 0 to 32768 [ 132.420112][ T6492] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 132.421421][ T6492] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 132.426123][ T6492] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 132.428317][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 132.429484][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 132.451387][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 21ms [ 132.452735][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 132.453596][ T6492] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 132.458788][ T6492] syz.2.485 (6492): drop_caches: 2 [ 132.484017][ T6490] loop1: detected capacity change from 0 to 32768 [ 132.506227][ T6494] loop4: detected capacity change from 0 to 32768 [ 132.512244][ T6490] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 132.513401][ T6490] CPU: 1 PID: 6490 Comm: syz.1.484 Not tainted syzkaller #0 [ 132.514569][ T6490] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 132.516365][ T6490] Call trace: [ 132.516844][ T6490] dump_backtrace+0x0/0x458 [ 132.517616][ T6490] show_stack+0x2c/0x3c [ 132.518309][ T6490] __dump_stack+0x30/0x40 [ 132.519072][ T6490] dump_stack_lvl+0xf4/0x15c [ 132.519837][ T6490] dump_stack+0x1c/0x5c [ 132.520582][ T6490] sysfs_create_dir_ns+0x244/0x264 [ 132.521483][ T6490] kobject_add_internal+0x5ac/0xc3c [ 132.522217][ T6490] kobject_init_and_add+0x124/0x190 [ 132.523025][ T6490] gfs2_sys_fs_add+0x200/0x41c [ 132.523842][ T6490] gfs2_fill_super+0xddc/0x1a18 [ 132.524617][ T6490] get_tree_bdev+0x358/0x544 [ 132.525348][ T6490] gfs2_get_tree+0x54/0x1b4 [ 132.526102][ T6490] vfs_get_tree+0x90/0x274 [ 132.526869][ T6490] do_new_mount+0x228/0x810 [ 132.527652][ T6490] path_mount+0x5bc/0x1008 [ 132.528439][ T6490] __arm64_sys_mount+0x514/0x5f0 [ 132.529271][ T6490] invoke_syscall+0x98/0x2b0 [ 132.530060][ T6490] el0_svc_common+0x138/0x258 [ 132.530841][ T6490] do_el0_svc+0x58/0x13c [ 132.531596][ T6490] el0_svc+0x78/0x1d0 [ 132.532311][ T6490] el0t_64_sync_handler+0xcc/0xe4 [ 132.533139][ T6490] el0t_64_sync+0x1a0/0x1a4 [ 132.561426][ T6496] loop0: detected capacity change from 0 to 32768 [ 132.563816][ T6490] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 132.565977][ T6490] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 132.601960][ T6496] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 132.602210][ T6494] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 132.603146][ T6496] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 132.604423][ T6494] CPU: 1 PID: 6494 Comm: syz.4.486 Not tainted syzkaller #0 [ 132.606634][ T6494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 132.608280][ T6494] Call trace: [ 132.608813][ T6494] dump_backtrace+0x0/0x458 [ 132.609571][ T6494] show_stack+0x2c/0x3c [ 132.610238][ T6494] __dump_stack+0x30/0x40 [ 132.611009][ T6494] dump_stack_lvl+0xf4/0x15c [ 132.611793][ T6494] dump_stack+0x1c/0x5c [ 132.612515][ T6494] sysfs_create_dir_ns+0x244/0x264 [ 132.613410][ T6494] kobject_add_internal+0x5ac/0xc3c [ 132.614327][ T6494] kobject_init_and_add+0x124/0x190 [ 132.615186][ T6494] gfs2_sys_fs_add+0x200/0x41c [ 132.616007][ T6494] gfs2_fill_super+0xddc/0x1a18 [ 132.616790][ T6494] get_tree_bdev+0x358/0x544 [ 132.617492][ T6494] gfs2_get_tree+0x54/0x1b4 [ 132.618194][ T6494] vfs_get_tree+0x90/0x274 [ 132.618844][ T6494] do_new_mount+0x228/0x810 [ 132.619534][ T6494] path_mount+0x5bc/0x1008 [ 132.620200][ T6494] __arm64_sys_mount+0x514/0x5f0 [ 132.621027][ T6494] invoke_syscall+0x98/0x2b0 [ 132.621771][ T6494] el0_svc_common+0x138/0x258 [ 132.622522][ T6494] do_el0_svc+0x58/0x13c [ 132.623254][ T6494] el0_svc+0x78/0x1d0 [ 132.623933][ T6494] el0t_64_sync_handler+0xcc/0xe4 [ 132.624755][ T6494] el0t_64_sync+0x1a0/0x1a4 [ 132.629206][ T6490] syz.1.484 (6490): drop_caches: 2 [ 132.640098][ T6496] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 132.646145][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 132.647179][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 132.682031][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 34ms [ 132.683352][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 132.684259][ T6496] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 132.685989][ T6494] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 132.691656][ T6494] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 132.694485][ T6496] syz.0.483 (6496): drop_caches: 2 [ 132.874904][ T6494] syz.4.486 (6494): drop_caches: 2 [ 133.041237][ T6500] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 133.042728][ T6500] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 133.044095][ T6498] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.045826][ T6498] CPU: 1 PID: 6498 Comm: syz.2.488 Not tainted syzkaller #0 [ 133.046924][ T6498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.048639][ T6498] Call trace: [ 133.049206][ T6498] dump_backtrace+0x0/0x458 [ 133.049899][ T6498] show_stack+0x2c/0x3c [ 133.050597][ T6498] __dump_stack+0x30/0x40 [ 133.051345][ T6498] dump_stack_lvl+0xf4/0x15c [ 133.052144][ T6498] dump_stack+0x1c/0x5c [ 133.052848][ T6498] sysfs_create_dir_ns+0x244/0x264 [ 133.053751][ T6498] kobject_add_internal+0x5ac/0xc3c [ 133.054636][ T6498] kobject_init_and_add+0x124/0x190 [ 133.055524][ T6498] gfs2_sys_fs_add+0x200/0x41c [ 133.056349][ T6498] gfs2_fill_super+0xddc/0x1a18 [ 133.057108][ T6498] get_tree_bdev+0x358/0x544 [ 133.057924][ T6498] gfs2_get_tree+0x54/0x1b4 [ 133.058715][ T6498] vfs_get_tree+0x90/0x274 [ 133.059483][ T6498] do_new_mount+0x228/0x810 [ 133.060248][ T6498] path_mount+0x5bc/0x1008 [ 133.061036][ T6498] __arm64_sys_mount+0x514/0x5f0 [ 133.061865][ T6498] invoke_syscall+0x98/0x2b0 [ 133.062621][ T6498] el0_svc_common+0x138/0x258 [ 133.063359][ T6498] do_el0_svc+0x58/0x13c [ 133.064082][ T6498] el0_svc+0x78/0x1d0 [ 133.064736][ T6498] el0t_64_sync_handler+0xcc/0xe4 [ 133.065600][ T6498] el0t_64_sync+0x1a0/0x1a4 [ 133.074419][ T6500] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 133.079104][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 133.080219][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 133.113128][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 32ms [ 133.114593][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 133.115374][ T6500] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 133.122266][ T6500] syz.3.487 (6500): drop_caches: 2 [ 133.130356][ T6498] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.132465][ T6498] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.141895][ T6498] syz.2.488 (6498): drop_caches: 2 [ 133.180466][ T6502] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 133.181869][ T6502] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 133.186219][ T6502] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 133.189376][ T6504] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.190676][ T6504] CPU: 1 PID: 6504 Comm: syz.0.490 Not tainted syzkaller #0 [ 133.191872][ T6504] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.193452][ T6504] Call trace: [ 133.193981][ T6504] dump_backtrace+0x0/0x458 [ 133.194677][ T6504] show_stack+0x2c/0x3c [ 133.195323][ T6504] __dump_stack+0x30/0x40 [ 133.196029][ T6504] dump_stack_lvl+0xf4/0x15c [ 133.196753][ T6504] dump_stack+0x1c/0x5c [ 133.197406][ T6504] sysfs_create_dir_ns+0x244/0x264 [ 133.198265][ T6504] kobject_add_internal+0x5ac/0xc3c [ 133.199112][ T6504] kobject_init_and_add+0x124/0x190 [ 133.199981][ T6504] gfs2_sys_fs_add+0x200/0x41c [ 133.200861][ T6504] gfs2_fill_super+0xddc/0x1a18 [ 133.201607][ T6504] get_tree_bdev+0x358/0x544 [ 133.202368][ T6504] gfs2_get_tree+0x54/0x1b4 [ 133.203060][ T6504] vfs_get_tree+0x90/0x274 [ 133.203710][ T6504] do_new_mount+0x228/0x810 [ 133.204421][ T6504] path_mount+0x5bc/0x1008 [ 133.205111][ T6504] __arm64_sys_mount+0x514/0x5f0 [ 133.205863][ T6504] invoke_syscall+0x98/0x2b0 [ 133.206499][ T6504] el0_svc_common+0x138/0x258 [ 133.207193][ T6504] do_el0_svc+0x58/0x13c [ 133.207829][ T6504] el0_svc+0x78/0x1d0 [ 133.208407][ T6504] el0t_64_sync_handler+0xcc/0xe4 [ 133.209159][ T6504] el0t_64_sync+0x1a0/0x1a4 [ 133.211320][ T4888] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 133.212372][ T4888] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 133.253697][ T4888] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 133.255128][ T4888] gfs2: fsid=syz:syz.0: jid=0: Done [ 133.255981][ T6502] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 133.260983][ T6506] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.262232][ T6506] CPU: 0 PID: 6506 Comm: syz.4.491 Not tainted syzkaller #0 [ 133.263457][ T6506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.265210][ T6506] Call trace: [ 133.265693][ T6506] dump_backtrace+0x0/0x458 [ 133.266367][ T6506] show_stack+0x2c/0x3c [ 133.266949][ T6506] __dump_stack+0x30/0x40 [ 133.267692][ T6506] dump_stack_lvl+0xf4/0x15c [ 133.268441][ T6506] dump_stack+0x1c/0x5c [ 133.269102][ T6506] sysfs_create_dir_ns+0x244/0x264 [ 133.269947][ T6506] kobject_add_internal+0x5ac/0xc3c [ 133.270822][ T6506] kobject_init_and_add+0x124/0x190 [ 133.271684][ T6506] gfs2_sys_fs_add+0x200/0x41c [ 133.272476][ T6506] gfs2_fill_super+0xddc/0x1a18 [ 133.273290][ T6506] get_tree_bdev+0x358/0x544 [ 133.274018][ T6506] gfs2_get_tree+0x54/0x1b4 [ 133.274754][ T6506] vfs_get_tree+0x90/0x274 [ 133.275482][ T6506] do_new_mount+0x228/0x810 [ 133.276238][ T6506] path_mount+0x5bc/0x1008 [ 133.277020][ T6506] __arm64_sys_mount+0x514/0x5f0 [ 133.277425][ T6504] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.277900][ T6506] invoke_syscall+0x98/0x2b0 [ 133.277923][ T6506] el0_svc_common+0x138/0x258 [ 133.280194][ T6504] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.280984][ T6506] do_el0_svc+0x58/0x13c [ 133.283386][ T6506] el0_svc+0x78/0x1d0 [ 133.283984][ T6506] el0t_64_sync_handler+0xcc/0xe4 [ 133.284744][ T6506] el0t_64_sync+0x1a0/0x1a4 [ 133.287178][ T6502] syz.1.489 (6502): drop_caches: 2 [ 133.294187][ T6504] syz.0.490 (6504): drop_caches: 2 [ 133.367828][ T6506] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.369924][ T6506] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.388691][ T6506] syz.4.491 (6506): drop_caches: 2 1970/01/01 00:02:13 executed programs: 490 [ 133.633269][ T6510] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 133.634622][ T6510] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 133.638113][ T6510] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 133.646881][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 133.648182][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 133.659863][ T6509] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.660995][ T6509] CPU: 1 PID: 6509 Comm: syz.3.492 Not tainted syzkaller #0 [ 133.662216][ T6509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.663870][ T6509] Call trace: [ 133.664411][ T6509] dump_backtrace+0x0/0x458 [ 133.665279][ T6509] show_stack+0x2c/0x3c [ 133.666004][ T6509] __dump_stack+0x30/0x40 [ 133.666771][ T6509] dump_stack_lvl+0xf4/0x15c [ 133.667522][ T6509] dump_stack+0x1c/0x5c [ 133.668224][ T6509] sysfs_create_dir_ns+0x244/0x264 [ 133.669058][ T6509] kobject_add_internal+0x5ac/0xc3c [ 133.669913][ T6509] kobject_init_and_add+0x124/0x190 [ 133.670822][ T6509] gfs2_sys_fs_add+0x200/0x41c [ 133.671569][ T6509] gfs2_fill_super+0xddc/0x1a18 [ 133.672394][ T6509] get_tree_bdev+0x358/0x544 [ 133.673151][ T6509] gfs2_get_tree+0x54/0x1b4 [ 133.673883][ T6509] vfs_get_tree+0x90/0x274 [ 133.674617][ T6509] do_new_mount+0x228/0x810 [ 133.675372][ T6509] path_mount+0x5bc/0x1008 [ 133.676070][ T6509] __arm64_sys_mount+0x514/0x5f0 [ 133.676836][ T6509] invoke_syscall+0x98/0x2b0 [ 133.677622][ T6509] el0_svc_common+0x138/0x258 [ 133.678397][ T6509] do_el0_svc+0x58/0x13c [ 133.679079][ T6509] el0_svc+0x78/0x1d0 [ 133.679734][ T6509] el0t_64_sync_handler+0xcc/0xe4 [ 133.680510][ T6509] el0t_64_sync+0x1a0/0x1a4 [ 133.689709][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 133.691059][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 133.691895][ T6510] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 133.703205][ T6510] syz.2.493 (6510): drop_caches: 2 [ 133.748652][ T6509] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.750764][ T6509] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.758149][ T6509] syz.3.492 (6509): drop_caches: 2 [ 133.819240][ T6512] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 133.820585][ T6512] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 133.823504][ T6512] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 133.832115][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 133.833209][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 133.863419][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 30ms [ 133.865152][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 133.866089][ T6512] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 133.869785][ T6514] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.871005][ T6514] CPU: 1 PID: 6514 Comm: syz.1.494 Not tainted syzkaller #0 [ 133.872286][ T6514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.873878][ T6514] Call trace: [ 133.874379][ T6514] dump_backtrace+0x0/0x458 [ 133.875145][ T6514] show_stack+0x2c/0x3c [ 133.875877][ T6514] __dump_stack+0x30/0x40 [ 133.876541][ T6514] dump_stack_lvl+0xf4/0x15c [ 133.877264][ T6514] dump_stack+0x1c/0x5c [ 133.877973][ T6514] sysfs_create_dir_ns+0x244/0x264 [ 133.878822][ T6514] kobject_add_internal+0x5ac/0xc3c [ 133.879788][ T6514] kobject_init_and_add+0x124/0x190 [ 133.880660][ T6514] gfs2_sys_fs_add+0x200/0x41c [ 133.881465][ T6514] gfs2_fill_super+0xddc/0x1a18 [ 133.882281][ T6514] get_tree_bdev+0x358/0x544 [ 133.883034][ T6514] gfs2_get_tree+0x54/0x1b4 [ 133.883795][ T6514] vfs_get_tree+0x90/0x274 [ 133.884577][ T6514] do_new_mount+0x228/0x810 [ 133.885326][ T6514] path_mount+0x5bc/0x1008 [ 133.886069][ T6514] __arm64_sys_mount+0x514/0x5f0 [ 133.886906][ T6514] invoke_syscall+0x98/0x2b0 [ 133.887652][ T6514] el0_svc_common+0x138/0x258 [ 133.888469][ T6514] do_el0_svc+0x58/0x13c [ 133.889261][ T6514] el0_svc+0x78/0x1d0 [ 133.889904][ T6514] el0t_64_sync_handler+0xcc/0xe4 [ 133.890727][ T6514] el0t_64_sync+0x1a0/0x1a4 [ 133.891833][ T6516] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 133.892913][ T6516] CPU: 1 PID: 6516 Comm: syz.4.496 Not tainted syzkaller #0 [ 133.894068][ T6516] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 133.895430][ T6516] Call trace: [ 133.895891][ T6516] dump_backtrace+0x0/0x458 [ 133.896485][ T6516] show_stack+0x2c/0x3c [ 133.897108][ T6516] __dump_stack+0x30/0x40 [ 133.897723][ T6516] dump_stack_lvl+0xf4/0x15c [ 133.898374][ T6516] dump_stack+0x1c/0x5c [ 133.898994][ T6516] sysfs_create_dir_ns+0x244/0x264 [ 133.899871][ T6516] kobject_add_internal+0x5ac/0xc3c [ 133.900752][ T6516] kobject_init_and_add+0x124/0x190 [ 133.901672][ T6516] gfs2_sys_fs_add+0x200/0x41c [ 133.902398][ T6516] gfs2_fill_super+0xddc/0x1a18 [ 133.903128][ T6516] get_tree_bdev+0x358/0x544 [ 133.903841][ T6516] gfs2_get_tree+0x54/0x1b4 [ 133.904559][ T6516] vfs_get_tree+0x90/0x274 [ 133.905345][ T6516] do_new_mount+0x228/0x810 [ 133.906047][ T6516] path_mount+0x5bc/0x1008 [ 133.906781][ T6516] __arm64_sys_mount+0x514/0x5f0 [ 133.907486][ T6516] invoke_syscall+0x98/0x2b0 [ 133.908251][ T6516] el0_svc_common+0x138/0x258 [ 133.908982][ T6516] do_el0_svc+0x58/0x13c [ 133.909621][ T6516] el0_svc+0x78/0x1d0 [ 133.910210][ T6516] el0t_64_sync_handler+0xcc/0xe4 [ 133.910974][ T6516] el0t_64_sync+0x1a0/0x1a4 [ 133.919464][ T6512] syz.0.495 (6512): drop_caches: 2 [ 133.937735][ T6516] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.939994][ T6516] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.947708][ T6514] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 133.949848][ T6514] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 133.964370][ T6516] syz.4.496 (6516): drop_caches: 2 [ 133.969838][ T6514] syz.1.494 (6514): drop_caches: 2 [ 134.209256][ T6518] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.209571][ T6520] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 134.210562][ T6518] CPU: 0 PID: 6518 Comm: syz.2.497 Not tainted syzkaller #0 [ 134.211915][ T6520] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 134.213152][ T6518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.215811][ T6518] Call trace: [ 134.216386][ T6518] dump_backtrace+0x0/0x458 [ 134.217141][ T6518] show_stack+0x2c/0x3c [ 134.217238][ T6520] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 134.217755][ T6518] __dump_stack+0x30/0x40 [ 134.217777][ T6518] dump_stack_lvl+0xf4/0x15c [ 134.217785][ T6518] dump_stack+0x1c/0x5c [ 134.217790][ T6518] sysfs_create_dir_ns+0x244/0x264 [ 134.217796][ T6518] kobject_add_internal+0x5ac/0xc3c [ 134.217803][ T6518] kobject_init_and_add+0x124/0x190 [ 134.217807][ T6518] gfs2_sys_fs_add+0x200/0x41c [ 134.217812][ T6518] gfs2_fill_super+0xddc/0x1a18 [ 134.217817][ T6518] get_tree_bdev+0x358/0x544 [ 134.217822][ T6518] gfs2_get_tree+0x54/0x1b4 [ 134.226632][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 134.226895][ T6518] vfs_get_tree+0x90/0x274 [ 134.228119][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 134.228755][ T6518] do_new_mount+0x228/0x810 [ 134.230506][ T6518] path_mount+0x5bc/0x1008 [ 134.231271][ T6518] __arm64_sys_mount+0x514/0x5f0 [ 134.232113][ T6518] invoke_syscall+0x98/0x2b0 [ 134.232945][ T6518] el0_svc_common+0x138/0x258 [ 134.233748][ T6518] do_el0_svc+0x58/0x13c [ 134.234480][ T6518] el0_svc+0x78/0x1d0 [ 134.235188][ T6518] el0t_64_sync_handler+0xcc/0xe4 [ 134.236049][ T6518] el0t_64_sync+0x1a0/0x1a4 [ 134.275932][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 47ms [ 134.280379][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 134.287533][ T6520] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 134.290498][ T6518] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 134.292724][ T6518] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 134.294001][ T6520] syz.3.498 (6520): drop_caches: 2 [ 134.410645][ T6526] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.410701][ T6524] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.411837][ T6526] CPU: 1 PID: 6526 Comm: syz.4.500 Not tainted syzkaller #0 [ 134.414192][ T6526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.415957][ T6526] Call trace: [ 134.416488][ T6526] dump_backtrace+0x0/0x458 [ 134.417162][ T6526] show_stack+0x2c/0x3c [ 134.417804][ T6526] __dump_stack+0x30/0x40 [ 134.418487][ T6526] dump_stack_lvl+0xf4/0x15c [ 134.419187][ T6526] dump_stack+0x1c/0x5c [ 134.419838][ T6526] sysfs_create_dir_ns+0x244/0x264 [ 134.420712][ T6526] kobject_add_internal+0x5ac/0xc3c [ 134.421539][ T6526] kobject_init_and_add+0x124/0x190 [ 134.422338][ T6526] gfs2_sys_fs_add+0x200/0x41c [ 134.423146][ T6526] gfs2_fill_super+0xddc/0x1a18 [ 134.423889][ T6526] get_tree_bdev+0x358/0x544 [ 134.424600][ T6526] gfs2_get_tree+0x54/0x1b4 [ 134.425249][ T6526] vfs_get_tree+0x90/0x274 [ 134.425926][ T6526] do_new_mount+0x228/0x810 [ 134.426601][ T6526] path_mount+0x5bc/0x1008 [ 134.427327][ T6526] __arm64_sys_mount+0x514/0x5f0 [ 134.428149][ T6526] invoke_syscall+0x98/0x2b0 [ 134.428989][ T6526] el0_svc_common+0x138/0x258 [ 134.429777][ T6526] do_el0_svc+0x58/0x13c [ 134.430568][ T6526] el0_svc+0x78/0x1d0 [ 134.431265][ T6526] el0t_64_sync_handler+0xcc/0xe4 [ 134.432118][ T6526] el0t_64_sync+0x1a0/0x1a4 [ 134.433343][ T6522] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.434583][ T6522] CPU: 1 PID: 6522 Comm: syz.0.499 Not tainted syzkaller #0 [ 134.435714][ T6522] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.437334][ T6522] Call trace: [ 134.437875][ T6522] dump_backtrace+0x0/0x458 [ 134.438615][ T6522] show_stack+0x2c/0x3c [ 134.439320][ T6522] __dump_stack+0x30/0x40 [ 134.440030][ T6522] dump_stack_lvl+0xf4/0x15c [ 134.440768][ T6522] dump_stack+0x1c/0x5c [ 134.441435][ T6522] sysfs_create_dir_ns+0x244/0x264 [ 134.442307][ T6522] kobject_add_internal+0x5ac/0xc3c [ 134.443171][ T6522] kobject_init_and_add+0x124/0x190 [ 134.444042][ T6522] gfs2_sys_fs_add+0x200/0x41c [ 134.444858][ T6522] gfs2_fill_super+0xddc/0x1a18 [ 134.445649][ T6522] get_tree_bdev+0x358/0x544 [ 134.446373][ T6522] gfs2_get_tree+0x54/0x1b4 [ 134.447067][ T6522] vfs_get_tree+0x90/0x274 [ 134.447765][ T6522] do_new_mount+0x228/0x810 [ 134.448519][ T6522] path_mount+0x5bc/0x1008 [ 134.449207][ T6522] __arm64_sys_mount+0x514/0x5f0 [ 134.449950][ T6522] invoke_syscall+0x98/0x2b0 [ 134.450687][ T6522] el0_svc_common+0x138/0x258 [ 134.451457][ T6522] do_el0_svc+0x58/0x13c [ 134.452195][ T6522] el0_svc+0x78/0x1d0 [ 134.452848][ T6522] el0t_64_sync_handler+0xcc/0xe4 [ 134.453713][ T6522] el0t_64_sync+0x1a0/0x1a4 [ 134.454414][ T6524] CPU: 0 PID: 6524 Comm: syz.1.501 Not tainted syzkaller #0 [ 134.455579][ T6524] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.456331][ T6522] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 134.457194][ T6524] Call trace: [ 134.459348][ T6522] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 134.459818][ T6524] dump_backtrace+0x0/0x458 [ 134.461028][ T6526] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 134.461510][ T6524] show_stack+0x2c/0x3c [ 134.463811][ T6526] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 134.464423][ T6524] __dump_stack+0x30/0x40 [ 134.466129][ T6524] dump_stack_lvl+0xf4/0x15c [ 134.466856][ T6524] dump_stack+0x1c/0x5c [ 134.467536][ T6524] sysfs_create_dir_ns+0x244/0x264 [ 134.468317][ T6524] kobject_add_internal+0x5ac/0xc3c [ 134.469096][ T6524] kobject_init_and_add+0x124/0x190 [ 134.469931][ T6524] gfs2_sys_fs_add+0x200/0x41c [ 134.470689][ T6524] gfs2_fill_super+0xddc/0x1a18 [ 134.471545][ T6524] get_tree_bdev+0x358/0x544 [ 134.472418][ T6524] gfs2_get_tree+0x54/0x1b4 [ 134.473197][ T6524] vfs_get_tree+0x90/0x274 [ 134.473923][ T6524] do_new_mount+0x228/0x810 [ 134.474691][ T6524] path_mount+0x5bc/0x1008 [ 134.475455][ T6524] __arm64_sys_mount+0x514/0x5f0 [ 134.476268][ T6524] invoke_syscall+0x98/0x2b0 [ 134.476964][ T6524] el0_svc_common+0x138/0x258 [ 134.477715][ T6524] do_el0_svc+0x58/0x13c [ 134.478505][ T6524] el0_svc+0x78/0x1d0 [ 134.479227][ T6524] el0t_64_sync_handler+0xcc/0xe4 [ 134.480111][ T6524] el0t_64_sync+0x1a0/0x1a4 [ 134.488173][ T6518] ================================================================== [ 134.489476][ T6518] BUG: KASAN: use-after-free in gfs2_qd_shrink_scan+0x568/0x7a4 [ 134.490729][ T6518] Write of size 4 at addr ffff0000f3bf0a70 by task syz.2.497/6518 [ 134.492036][ T6518] [ 134.492433][ T6518] CPU: 0 PID: 6518 Comm: syz.2.497 Not tainted syzkaller #0 [ 134.493677][ T6518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.495356][ T6518] Call trace: [ 134.495885][ T6518] dump_backtrace+0x0/0x458 [ 134.496629][ T6518] show_stack+0x2c/0x3c [ 134.497322][ T6518] __dump_stack+0x30/0x40 [ 134.498052][ T6518] dump_stack_lvl+0xf4/0x15c [ 134.498825][ T6518] print_address_description+0x78/0x30c [ 134.499746][ T6518] kasan_report+0xec/0x158 [ 134.500453][ T6518] kasan_check_range+0x268/0x2a0 [ 134.501276][ T6518] __kasan_check_write+0x44/0x54 [ 134.502147][ T6518] gfs2_qd_shrink_scan+0x568/0x7a4 [ 134.502915][ T6518] do_shrink_slab+0x478/0xf8c [ 134.503744][ T6518] shrink_slab+0x198/0x710 [ 134.504487][ T6518] drop_slab_node+0xcc/0x170 [ 134.505250][ T6518] drop_slab+0x84/0xf8 [ 134.505938][ T6518] drop_caches_sysctl_handler+0x16c/0x2fc [ 134.506957][ T6518] proc_sys_call_handler+0x3e0/0x648 [ 134.507864][ T6518] proc_sys_write+0x2c/0x3c [ 134.508644][ T6518] do_iter_readv_writev+0x3a8/0x50c [ 134.509523][ T6518] do_iter_write+0x1c4/0x670 [ 134.510270][ T6518] do_writev+0x210/0x3ec [ 134.510981][ T6518] __arm64_sys_writev+0x80/0x94 [ 134.511843][ T6518] invoke_syscall+0x98/0x2b0 [ 134.512638][ T6518] el0_svc_common+0x138/0x258 [ 134.513492][ T6518] do_el0_svc+0x58/0x13c [ 134.514201][ T6518] el0_svc+0x78/0x1d0 [ 134.514832][ T6518] el0t_64_sync_handler+0xcc/0xe4 [ 134.515681][ T6518] el0t_64_sync+0x1a0/0x1a4 [ 134.516361][ T6518] [ 134.516723][ T6518] Allocated by task 6520: [ 134.517407][ T6518] __kasan_kmalloc+0xb0/0xf0 [ 134.518137][ T6518] kmem_cache_alloc_trace+0x26c/0x3ec [ 134.518978][ T6518] gfs2_fill_super+0x13c/0x1a18 [ 134.519752][ T6518] get_tree_bdev+0x358/0x544 [ 134.520518][ T6518] gfs2_get_tree+0x54/0x1b4 [ 134.521272][ T6518] vfs_get_tree+0x90/0x274 [ 134.521977][ T6518] do_new_mount+0x228/0x810 [ 134.522681][ T6518] path_mount+0x5bc/0x1008 [ 134.523356][ T6518] __arm64_sys_mount+0x514/0x5f0 [ 134.524124][ T6518] invoke_syscall+0x98/0x2b0 [ 134.524853][ T6518] el0_svc_common+0x138/0x258 [ 134.525551][ T6518] do_el0_svc+0x58/0x13c [ 134.526203][ T6518] el0_svc+0x78/0x1d0 [ 134.526819][ T6518] el0t_64_sync_handler+0xcc/0xe4 [ 134.527581][ T6518] el0t_64_sync+0x1a0/0x1a4 [ 134.528245][ T6518] [ 134.528600][ T6518] Freed by task 4944: [ 134.529209][ T6518] kasan_set_track+0x4c/0x84 [ 134.529888][ T6518] kasan_set_free_info+0x28/0x4c [ 134.530685][ T6518] ____kasan_slab_free+0x118/0x164 [ 134.531453][ T6518] __kasan_slab_free+0x18/0x28 [ 134.532185][ T6518] slab_free_freelist_hook+0x128/0x1e4 [ 134.533045][ T6518] kfree+0x16c/0x400 [ 134.533683][ T6518] free_sbd+0x5c/0x6c [ 134.534328][ T6518] gfs2_put_super+0x63c/0x6b4 [ 134.535072][ T6518] generic_shutdown_super+0x130/0x2f0 [ 134.535880][ T6518] kill_block_super+0x70/0xdc [ 134.536626][ T6518] gfs2_kill_sb+0xc0/0xd4 [ 134.537375][ T6518] deactivate_locked_super+0xb8/0x134 [ 134.538223][ T6518] deactivate_super+0xf0/0x110 [ 134.538958][ T6518] cleanup_mnt+0x3b8/0x46c [ 134.539646][ T6518] __cleanup_mnt+0x20/0x30 [ 134.540349][ T6518] task_work_run+0x12c/0x1d8 [ 134.541085][ T6518] do_notify_resume+0x2450/0x309c [ 134.541904][ T6518] el0_svc+0xf0/0x1d0 [ 134.542576][ T6518] el0t_64_sync_handler+0xcc/0xe4 [ 134.543389][ T6518] el0t_64_sync+0x1a0/0x1a4 [ 134.544180][ T6518] [ 134.544556][ T6518] The buggy address belongs to the object at ffff0000f3bf0000 [ 134.544556][ T6518] which belongs to the cache kmalloc-8k of size 8192 [ 134.546935][ T6518] The buggy address is located 2672 bytes inside of [ 134.546935][ T6518] 8192-byte region [ffff0000f3bf0000, ffff0000f3bf2000) [ 134.549046][ T6518] The buggy address belongs to the page: [ 134.549993][ T6518] page:0000000041a290af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x133bf0 [ 134.551525][ T6518] head:0000000041a290af order:3 compound_mapcount:0 compound_pincount:0 [ 134.552920][ T6518] flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) [ 134.554325][ T6518] raw: 05ffc00000010200 0000000000000000 0000000100000001 ffff0000c0002c00 [ 134.555779][ T6518] raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 [ 134.557096][ T6518] page dumped because: kasan: bad access detected [ 134.558030][ T6518] [ 134.558358][ T6518] Memory state around the buggy address: [ 134.559277][ T6518] ffff0000f3bf0900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.560602][ T6518] ffff0000f3bf0980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.561774][ T6518] >ffff0000f3bf0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.563027][ T6518] ^ [ 134.564223][ T6518] ffff0000f3bf0a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.565532][ T6518] ffff0000f3bf0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 134.566905][ T6518] ================================================================== [ 134.568302][ T6518] Disabling lock debugging due to kernel taint [ 134.574439][ T6524] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 134.576569][ T6524] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 134.578100][ T6518] syz.2.497 (6518): drop_caches: 2 [ 134.578686][ T6522] syz.0.499 (6522): drop_caches: 2 [ 134.580519][ T6526] syz.4.500 (6526): drop_caches: 2 [ 134.581458][ T6524] syz.1.501 (6524): drop_caches: 2 [ 134.868603][ T6534] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 134.870028][ T6534] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 134.872306][ T6534] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 134.873802][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 134.874925][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 134.899285][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 24ms [ 134.900497][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 134.901402][ T6534] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 134.901612][ T6532] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.903839][ T6532] CPU: 1 PID: 6532 Comm: syz.4.505 Tainted: G B syzkaller #0 [ 134.905413][ T6532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.905709][ T6534] syz.2.506 (6534): drop_caches: 2 [ 134.907085][ T6532] Call trace: [ 134.908373][ T6532] dump_backtrace+0x0/0x458 [ 134.909025][ T6532] show_stack+0x2c/0x3c [ 134.909639][ T6532] __dump_stack+0x30/0x40 [ 134.910306][ T6532] dump_stack_lvl+0xf4/0x15c [ 134.911012][ T6532] dump_stack+0x1c/0x5c [ 134.911776][ T6532] sysfs_create_dir_ns+0x244/0x264 [ 134.912599][ T6532] kobject_add_internal+0x5ac/0xc3c [ 134.913433][ T6532] kobject_init_and_add+0x124/0x190 [ 134.914284][ T6532] gfs2_sys_fs_add+0x200/0x41c [ 134.915069][ T6532] gfs2_fill_super+0xddc/0x1a18 [ 134.915850][ T6532] get_tree_bdev+0x358/0x544 [ 134.916567][ T6532] gfs2_get_tree+0x54/0x1b4 [ 134.917347][ T6532] vfs_get_tree+0x90/0x274 [ 134.918036][ T6532] do_new_mount+0x228/0x810 [ 134.918816][ T6532] path_mount+0x5bc/0x1008 [ 134.919544][ T6532] __arm64_sys_mount+0x514/0x5f0 [ 134.920416][ T6532] invoke_syscall+0x98/0x2b0 [ 134.921151][ T6532] el0_svc_common+0x138/0x258 [ 134.921941][ T6532] do_el0_svc+0x58/0x13c [ 134.922649][ T6532] el0_svc+0x78/0x1d0 [ 134.923317][ T6532] el0t_64_sync_handler+0xcc/0xe4 [ 134.924120][ T6532] el0t_64_sync+0x1a0/0x1a4 [ 134.938741][ T6532] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 134.946381][ T6532] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 134.949565][ T6530] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 134.950847][ T6530] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 134.952097][ T6532] syz.4.505 (6532): drop_caches: 2 [ 134.952991][ T6530] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 134.954603][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 134.955681][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 134.979464][ T6528] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 134.980740][ T6528] CPU: 1 PID: 6528 Comm: syz.0.504 Tainted: G B syzkaller #0 [ 134.982087][ T6528] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 134.982088][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 134.982162][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 134.983754][ T6528] Call trace: [ 134.985063][ T6530] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 134.985853][ T6528] dump_backtrace+0x0/0x458 [ 134.988195][ T6528] show_stack+0x2c/0x3c [ 134.988882][ T6528] __dump_stack+0x30/0x40 [ 134.989556][ T6528] dump_stack_lvl+0xf4/0x15c [ 134.990267][ T6528] dump_stack+0x1c/0x5c [ 134.990929][ T6528] sysfs_create_dir_ns+0x244/0x264 [ 134.991788][ T6528] kobject_add_internal+0x5ac/0xc3c [ 134.992636][ T6528] kobject_init_and_add+0x124/0x190 [ 134.993475][ T6528] gfs2_sys_fs_add+0x200/0x41c [ 134.994247][ T6528] gfs2_fill_super+0xddc/0x1a18 [ 134.995015][ T6528] get_tree_bdev+0x358/0x544 [ 134.995793][ T6528] gfs2_get_tree+0x54/0x1b4 [ 134.996572][ T6528] vfs_get_tree+0x90/0x274 [ 134.997280][ T6528] do_new_mount+0x228/0x810 [ 134.998036][ T6528] path_mount+0x5bc/0x1008 [ 134.998779][ T6528] __arm64_sys_mount+0x514/0x5f0 [ 134.999603][ T6528] invoke_syscall+0x98/0x2b0 [ 135.000412][ T6528] el0_svc_common+0x138/0x258 [ 135.001158][ T6528] do_el0_svc+0x58/0x13c [ 135.001873][ T6528] el0_svc+0x78/0x1d0 [ 135.002511][ T6528] el0t_64_sync_handler+0xcc/0xe4 [ 135.003341][ T6528] el0t_64_sync+0x1a0/0x1a4 [ 135.007318][ T6530] syz.1.503 (6530): drop_caches: 2 [ 135.027478][ T6528] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 135.029495][ T6528] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 135.031170][ T6528] syz.0.504 (6528): drop_caches: 2 [ 135.049215][ T6536] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.050544][ T6536] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.078597][ T6536] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.086044][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.087169][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.117486][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 30ms [ 135.118778][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.124063][ T6536] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.128184][ T6536] syz.3.502 (6536): drop_caches: 2 [ 135.288197][ T6538] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.289769][ T6538] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.292259][ T6538] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.293698][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.294754][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.308009][ T6540] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 135.309214][ T6540] CPU: 1 PID: 6540 Comm: syz.4.508 Tainted: G B syzkaller #0 [ 135.310637][ T6540] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 135.312379][ T6540] Call trace: [ 135.312921][ T6540] dump_backtrace+0x0/0x458 [ 135.313783][ T6540] show_stack+0x2c/0x3c [ 135.314474][ T6540] __dump_stack+0x30/0x40 [ 135.315180][ T6540] dump_stack_lvl+0xf4/0x15c [ 135.315934][ T6540] dump_stack+0x1c/0x5c [ 135.316631][ T6540] sysfs_create_dir_ns+0x244/0x264 [ 135.317529][ T6540] kobject_add_internal+0x5ac/0xc3c [ 135.318393][ T6540] kobject_init_and_add+0x124/0x190 [ 135.319159][ T6540] gfs2_sys_fs_add+0x200/0x41c [ 135.319170][ T6542] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 135.319918][ T6540] gfs2_fill_super+0xddc/0x1a18 [ 135.321950][ T6540] get_tree_bdev+0x358/0x544 [ 135.322666][ T6540] gfs2_get_tree+0x54/0x1b4 [ 135.323327][ T6540] vfs_get_tree+0x90/0x274 [ 135.323987][ T6540] do_new_mount+0x228/0x810 [ 135.324783][ T6540] path_mount+0x5bc/0x1008 [ 135.325509][ T6540] __arm64_sys_mount+0x514/0x5f0 [ 135.326387][ T6540] invoke_syscall+0x98/0x2b0 [ 135.327177][ T6540] el0_svc_common+0x138/0x258 [ 135.327975][ T6540] do_el0_svc+0x58/0x13c [ 135.328726][ T6540] el0_svc+0x78/0x1d0 [ 135.329399][ T6540] el0t_64_sync_handler+0xcc/0xe4 [ 135.330231][ T6540] el0t_64_sync+0x1a0/0x1a4 [ 135.330919][ T6542] CPU: 0 PID: 6542 Comm: syz.1.509 Tainted: G B syzkaller #0 [ 135.332296][ T6542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 135.333979][ T6542] Call trace: [ 135.334514][ T6542] dump_backtrace+0x0/0x458 [ 135.335264][ T6542] show_stack+0x2c/0x3c [ 135.335932][ T6542] __dump_stack+0x30/0x40 [ 135.336355][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 41ms [ 135.336645][ T6542] dump_stack_lvl+0xf4/0x15c [ 135.337898][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.338451][ T6542] dump_stack+0x1c/0x5c [ 135.339183][ T6538] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.339887][ T6542] sysfs_create_dir_ns+0x244/0x264 [ 135.341843][ T6542] kobject_add_internal+0x5ac/0xc3c [ 135.342678][ T6542] kobject_init_and_add+0x124/0x190 [ 135.343576][ T6542] gfs2_sys_fs_add+0x200/0x41c [ 135.344402][ T6542] gfs2_fill_super+0xddc/0x1a18 [ 135.345175][ T6542] get_tree_bdev+0x358/0x544 [ 135.345957][ T6542] gfs2_get_tree+0x54/0x1b4 [ 135.346776][ T6542] vfs_get_tree+0x90/0x274 [ 135.347487][ T6542] do_new_mount+0x228/0x810 [ 135.348270][ T6542] path_mount+0x5bc/0x1008 [ 135.349013][ T6542] __arm64_sys_mount+0x514/0x5f0 [ 135.349821][ T6542] invoke_syscall+0x98/0x2b0 [ 135.350597][ T6542] el0_svc_common+0x138/0x258 [ 135.351374][ T6542] do_el0_svc+0x58/0x13c [ 135.352063][ T6542] el0_svc+0x78/0x1d0 [ 135.352737][ T6542] el0t_64_sync_handler+0xcc/0xe4 [ 135.353591][ T6542] el0t_64_sync+0x1a0/0x1a4 [ 135.357789][ T6538] syz.2.507 (6538): drop_caches: 2 [ 135.367504][ T6540] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 135.369734][ T6540] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 135.388795][ T6542] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 135.389989][ T6540] syz.4.508 (6540): drop_caches: 2 [ 135.390920][ T6542] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 135.396236][ T6542] syz.1.509 (6542): drop_caches: 2 [ 135.401813][ T6544] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.403186][ T6544] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.405937][ T6544] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.407719][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.408805][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.440999][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 32ms [ 135.442323][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.443172][ T6544] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.446328][ T6544] syz.0.510 (6544): drop_caches: 2 [ 135.479477][ T6546] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.480876][ T6546] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.485163][ T6546] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.486813][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.487965][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.527437][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 39ms [ 135.537472][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.538271][ T6546] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.542340][ T6546] syz.3.511 (6546): drop_caches: 2 [ 135.698192][ T6548] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.699593][ T6548] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.702098][ T6548] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.703710][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.704783][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.729819][ T6552] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 135.731090][ T6552] CPU: 1 PID: 6552 Comm: syz.4.513 Tainted: G B syzkaller #0 [ 135.732597][ T6552] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 135.734354][ T6552] Call trace: [ 135.734911][ T6552] dump_backtrace+0x0/0x458 [ 135.735709][ T6552] show_stack+0x2c/0x3c [ 135.736415][ T6552] __dump_stack+0x30/0x40 [ 135.737169][ T6552] dump_stack_lvl+0xf4/0x15c [ 135.737929][ T6552] dump_stack+0x1c/0x5c [ 135.738628][ T6552] sysfs_create_dir_ns+0x244/0x264 [ 135.739528][ T6552] kobject_add_internal+0x5ac/0xc3c [ 135.740397][ T6552] kobject_init_and_add+0x124/0x190 [ 135.741291][ T6552] gfs2_sys_fs_add+0x200/0x41c [ 135.742071][ T6552] gfs2_fill_super+0xddc/0x1a18 [ 135.742927][ T6552] get_tree_bdev+0x358/0x544 [ 135.743680][ T6552] gfs2_get_tree+0x54/0x1b4 [ 135.744375][ T6552] vfs_get_tree+0x90/0x274 [ 135.745191][ T6552] do_new_mount+0x228/0x810 [ 135.746007][ T6552] path_mount+0x5bc/0x1008 [ 135.746781][ T6552] __arm64_sys_mount+0x514/0x5f0 [ 135.747643][ T6552] invoke_syscall+0x98/0x2b0 [ 135.748429][ T6552] el0_svc_common+0x138/0x258 [ 135.749258][ T6552] do_el0_svc+0x58/0x13c [ 135.750023][ T6552] el0_svc+0x78/0x1d0 [ 135.750713][ T6552] el0t_64_sync_handler+0xcc/0xe4 [ 135.751527][ T6552] el0t_64_sync+0x1a0/0x1a4 [ 135.754477][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 49ms [ 135.755674][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.756472][ T6548] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.760383][ T6548] syz.2.512 (6548): drop_caches: 2 [ 135.800443][ T6552] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 135.803984][ T6552] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 135.805958][ T6552] syz.4.513 (6552): drop_caches: 2 [ 135.819740][ T6551] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.819948][ T6554] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 135.821041][ T6551] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.822197][ T6554] CPU: 1 PID: 6554 Comm: syz.0.515 Tainted: G B syzkaller #0 [ 135.824539][ T6551] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.824902][ T6554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 135.827813][ T6554] Call trace: [ 135.828370][ T6554] dump_backtrace+0x0/0x458 [ 135.829083][ T6554] show_stack+0x2c/0x3c [ 135.829787][ T6554] __dump_stack+0x30/0x40 [ 135.830485][ T6554] dump_stack_lvl+0xf4/0x15c [ 135.831372][ T6554] dump_stack+0x1c/0x5c [ 135.832068][ T6554] sysfs_create_dir_ns+0x244/0x264 [ 135.832892][ T6554] kobject_add_internal+0x5ac/0xc3c [ 135.833740][ T6554] kobject_init_and_add+0x124/0x190 [ 135.834616][ T6554] gfs2_sys_fs_add+0x200/0x41c [ 135.835369][ T6554] gfs2_fill_super+0xddc/0x1a18 [ 135.836104][ T6554] get_tree_bdev+0x358/0x544 [ 135.836818][ T6554] gfs2_get_tree+0x54/0x1b4 [ 135.837516][ T6554] vfs_get_tree+0x90/0x274 [ 135.838231][ T6554] do_new_mount+0x228/0x810 [ 135.838952][ T6554] path_mount+0x5bc/0x1008 [ 135.839608][ T6554] __arm64_sys_mount+0x514/0x5f0 [ 135.840350][ T6554] invoke_syscall+0x98/0x2b0 [ 135.841107][ T6554] el0_svc_common+0x138/0x258 [ 135.841837][ T6554] do_el0_svc+0x58/0x13c [ 135.842501][ T6554] el0_svc+0x78/0x1d0 [ 135.843087][ T6554] el0t_64_sync_handler+0xcc/0xe4 [ 135.843801][ T6554] el0t_64_sync+0x1a0/0x1a4 [ 135.847323][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.848594][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.863569][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 14ms [ 135.864859][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.865781][ T6551] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.871146][ T6551] syz.1.514 (6551): drop_caches: 2 [ 135.889918][ T6556] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 135.891276][ T6556] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 135.893474][ T6556] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 135.894955][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 135.895942][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 135.909378][ T6554] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 135.911538][ T6554] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 135.923926][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 27ms [ 135.925281][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 135.926240][ T6556] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 135.935861][ T6556] syz.3.516 (6556): drop_caches: 2 [ 136.027386][ T6554] syz.0.515 (6554): drop_caches: 2 [ 136.069205][ T6558] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.070732][ T6558] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.078830][ T6558] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.082870][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.083834][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.104780][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 20ms [ 136.106038][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.106966][ T6558] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.110613][ T6558] syz.2.517 (6558): drop_caches: 2 [ 136.177245][ T6560] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.181978][ T6560] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.188956][ T6560] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.201353][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.202525][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.230422][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 27ms [ 136.233566][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.234429][ T6560] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.241125][ T6560] syz.4.518 (6560): drop_caches: 2 [ 136.248025][ T6563] set_capacity_and_notify: 32 callbacks suppressed [ 136.248033][ T6563] loop1: detected capacity change from 0 to 32768 [ 136.253377][ T6563] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.256486][ T6563] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.275355][ T6565] loop3: detected capacity change from 0 to 32768 [ 136.277012][ T6565] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 136.282627][ T6565] CPU: 1 PID: 6565 Comm: syz.3.520 Tainted: G B syzkaller #0 [ 136.283974][ T6565] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 136.285384][ T6563] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.285568][ T6565] Call trace: [ 136.287301][ T6565] dump_backtrace+0x0/0x458 [ 136.288088][ T6565] show_stack+0x2c/0x3c [ 136.288770][ T6565] __dump_stack+0x30/0x40 [ 136.289506][ T6565] dump_stack_lvl+0xf4/0x15c [ 136.290320][ T6565] dump_stack+0x1c/0x5c [ 136.290975][ T6565] sysfs_create_dir_ns+0x244/0x264 [ 136.291868][ T6565] kobject_add_internal+0x5ac/0xc3c [ 136.292774][ T6565] kobject_init_and_add+0x124/0x190 [ 136.293704][ T6565] gfs2_sys_fs_add+0x200/0x41c [ 136.294507][ T6565] gfs2_fill_super+0xddc/0x1a18 [ 136.295310][ T6565] get_tree_bdev+0x358/0x544 [ 136.295675][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.295958][ T6565] gfs2_get_tree+0x54/0x1b4 [ 136.297036][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.297651][ T6565] vfs_get_tree+0x90/0x274 [ 136.297670][ T6565] do_new_mount+0x228/0x810 [ 136.300059][ T6565] path_mount+0x5bc/0x1008 [ 136.300712][ T6565] __arm64_sys_mount+0x514/0x5f0 [ 136.301389][ T6565] invoke_syscall+0x98/0x2b0 [ 136.302021][ T6565] el0_svc_common+0x138/0x258 [ 136.302722][ T6565] do_el0_svc+0x58/0x13c [ 136.303365][ T6565] el0_svc+0x78/0x1d0 [ 136.304032][ T6565] el0t_64_sync_handler+0xcc/0xe4 [ 136.304811][ T6565] el0t_64_sync+0x1a0/0x1a4 [ 136.322528][ T6565] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 136.325611][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 136.326917][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.328105][ T6563] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.330111][ T6565] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 136.332839][ T6563] syz.1.519 (6563): drop_caches: 2 [ 136.333069][ T6565] syz.3.520 (6565): drop_caches: 2 [ 136.382631][ T6567] loop0: detected capacity change from 0 to 32768 [ 136.437981][ T6567] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.439316][ T6567] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.445636][ T6567] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.447299][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.448454][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.475360][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 136.476617][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.487421][ T6567] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.490508][ T6567] syz.0.521 (6567): drop_caches: 2 [ 136.514024][ T6569] loop2: detected capacity change from 0 to 32768 [ 136.558492][ T6569] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.559854][ T6569] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.562262][ T6569] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.563918][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.564892][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.585356][ T6571] loop4: detected capacity change from 0 to 32768 [ 136.589804][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 24ms [ 136.591051][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.597433][ T6569] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.601376][ T6569] syz.2.522 (6569): drop_caches: 2 [ 136.602086][ T6573] loop1: detected capacity change from 0 to 32768 [ 136.618322][ T6571] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.619648][ T6571] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.621915][ T6571] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.623497][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.624615][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.644633][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 20ms [ 136.645875][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.646693][ T6571] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.651844][ T6571] syz.4.523 (6571): drop_caches: 2 [ 136.660332][ T6575] loop3: detected capacity change from 0 to 32768 [ 136.660749][ T6573] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 136.662585][ T6573] CPU: 0 PID: 6573 Comm: syz.1.524 Tainted: G B syzkaller #0 [ 136.664065][ T6573] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 136.665762][ T6573] Call trace: [ 136.666360][ T6573] dump_backtrace+0x0/0x458 [ 136.667072][ T6573] show_stack+0x2c/0x3c [ 136.667743][ T6573] __dump_stack+0x30/0x40 [ 136.668460][ T6573] dump_stack_lvl+0xf4/0x15c [ 136.669220][ T6573] dump_stack+0x1c/0x5c [ 136.669964][ T6573] sysfs_create_dir_ns+0x244/0x264 [ 136.670862][ T6573] kobject_add_internal+0x5ac/0xc3c [ 136.671672][ T6573] kobject_init_and_add+0x124/0x190 [ 136.672561][ T6573] gfs2_sys_fs_add+0x200/0x41c [ 136.673350][ T6573] gfs2_fill_super+0xddc/0x1a18 [ 136.674172][ T6573] get_tree_bdev+0x358/0x544 [ 136.675058][ T6573] gfs2_get_tree+0x54/0x1b4 [ 136.675833][ T6573] vfs_get_tree+0x90/0x274 [ 136.676568][ T6573] do_new_mount+0x228/0x810 [ 136.677347][ T6573] path_mount+0x5bc/0x1008 [ 136.678173][ T6573] __arm64_sys_mount+0x514/0x5f0 [ 136.678995][ T6573] invoke_syscall+0x98/0x2b0 [ 136.679749][ T6573] el0_svc_common+0x138/0x258 [ 136.680616][ T6573] do_el0_svc+0x58/0x13c [ 136.681265][ T6573] el0_svc+0x78/0x1d0 [ 136.682034][ T6573] el0t_64_sync_handler+0xcc/0xe4 [ 136.682852][ T6573] el0t_64_sync+0x1a0/0x1a4 [ 136.692935][ T6573] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 136.695413][ T6573] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 136.701678][ T6573] syz.1.524 (6573): drop_caches: 2 [ 136.714781][ T6575] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.716133][ T6575] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.725379][ T6575] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.735292][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.736399][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.760248][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 136.761541][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.762464][ T6575] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.766539][ T6575] syz.3.525 (6575): drop_caches: 2 [ 136.897283][ T6578] loop0: detected capacity change from 0 to 32768 [ 136.908770][ T6578] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 136.910081][ T6578] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 136.920238][ T6578] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 136.926132][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 136.927182][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 136.946697][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 136.948186][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 136.949017][ T6578] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 136.952399][ T6578] syz.0.526 (6578): drop_caches: 2 [ 136.970408][ T6580] loop2: detected capacity change from 0 to 32768 [ 136.974358][ T6580] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.003490][ T6580] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.005716][ T6580] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.011160][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.011455][ T6582] loop1: detected capacity change from 0 to 32768 [ 137.012195][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.041678][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 29ms [ 137.042925][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.043904][ T6580] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.048625][ T6580] syz.2.527 (6580): drop_caches: 2 [ 137.056738][ T6584] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 137.060605][ T6582] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 137.061664][ T6584] CPU: 1 PID: 6584 Comm: syz.4.528 Tainted: G B syzkaller #0 [ 137.063185][ T6584] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 137.064958][ T6584] Call trace: [ 137.065520][ T6584] dump_backtrace+0x0/0x458 [ 137.066235][ T6584] show_stack+0x2c/0x3c [ 137.066904][ T6584] __dump_stack+0x30/0x40 [ 137.067663][ T6584] dump_stack_lvl+0xf4/0x15c [ 137.068401][ T6584] dump_stack+0x1c/0x5c [ 137.069061][ T6584] sysfs_create_dir_ns+0x244/0x264 [ 137.069943][ T6584] kobject_add_internal+0x5ac/0xc3c [ 137.070792][ T6584] kobject_init_and_add+0x124/0x190 [ 137.071709][ T6584] gfs2_sys_fs_add+0x200/0x41c [ 137.072557][ T6584] gfs2_fill_super+0xddc/0x1a18 [ 137.073486][ T6584] get_tree_bdev+0x358/0x544 [ 137.074214][ T6584] gfs2_get_tree+0x54/0x1b4 [ 137.074962][ T6584] vfs_get_tree+0x90/0x274 [ 137.075716][ T6584] do_new_mount+0x228/0x810 [ 137.076374][ T6584] path_mount+0x5bc/0x1008 [ 137.077144][ T6584] __arm64_sys_mount+0x514/0x5f0 [ 137.077976][ T6584] invoke_syscall+0x98/0x2b0 [ 137.078749][ T6584] el0_svc_common+0x138/0x258 [ 137.079442][ T6584] do_el0_svc+0x58/0x13c [ 137.080167][ T6584] el0_svc+0x78/0x1d0 [ 137.080911][ T6584] el0t_64_sync_handler+0xcc/0xe4 [ 137.081759][ T6584] el0t_64_sync+0x1a0/0x1a4 [ 137.082543][ T6582] CPU: 0 PID: 6582 Comm: syz.1.529 Tainted: G B syzkaller #0 [ 137.083955][ T6582] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 137.085650][ T6582] Call trace: [ 137.086215][ T6582] dump_backtrace+0x0/0x458 [ 137.086985][ T6582] show_stack+0x2c/0x3c [ 137.087606][ T6582] __dump_stack+0x30/0x40 [ 137.088286][ T6582] dump_stack_lvl+0xf4/0x15c [ 137.089084][ T6582] dump_stack+0x1c/0x5c [ 137.089803][ T6582] sysfs_create_dir_ns+0x244/0x264 [ 137.090646][ T6582] kobject_add_internal+0x5ac/0xc3c [ 137.091524][ T6582] kobject_init_and_add+0x124/0x190 [ 137.092360][ T6582] gfs2_sys_fs_add+0x200/0x41c [ 137.093102][ T6582] gfs2_fill_super+0xddc/0x1a18 [ 137.093895][ T6582] get_tree_bdev+0x358/0x544 [ 137.094631][ T6582] gfs2_get_tree+0x54/0x1b4 [ 137.095330][ T6582] vfs_get_tree+0x90/0x274 [ 137.096025][ T6582] do_new_mount+0x228/0x810 [ 137.096756][ T6582] path_mount+0x5bc/0x1008 [ 137.097508][ T6582] __arm64_sys_mount+0x514/0x5f0 [ 137.098332][ T6582] invoke_syscall+0x98/0x2b0 [ 137.099136][ T6582] el0_svc_common+0x138/0x258 [ 137.099979][ T6582] do_el0_svc+0x58/0x13c [ 137.100673][ T6582] el0_svc+0x78/0x1d0 [ 137.101375][ T6582] el0t_64_sync_handler+0xcc/0xe4 [ 137.102198][ T6582] el0t_64_sync+0x1a0/0x1a4 [ 137.103647][ T6586] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.105045][ T6586] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.109343][ T6586] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.111040][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.112141][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.127484][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 15ms [ 137.128752][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.129661][ T6586] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.132930][ T6586] syz.3.530 (6586): drop_caches: 2 [ 137.154172][ T6582] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 137.156348][ T6582] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 137.160979][ T6582] syz.1.529 (6582): drop_caches: 2 [ 137.161237][ T6584] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 137.181835][ T6584] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 137.183631][ T6584] syz.4.528 (6584): drop_caches: 2 [ 137.339891][ T6588] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.341228][ T6588] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.343428][ T6588] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.349380][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.350495][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.384800][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 34ms [ 137.385987][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.386855][ T6588] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.390996][ T6588] syz.0.531 (6588): drop_caches: 2 [ 137.408800][ T6590] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 137.410021][ T6590] CPU: 0 PID: 6590 Comm: syz.2.532 Tainted: G B syzkaller #0 [ 137.411449][ T6590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 137.413197][ T6590] Call trace: [ 137.413716][ T6590] dump_backtrace+0x0/0x458 [ 137.414440][ T6590] show_stack+0x2c/0x3c [ 137.415161][ T6590] __dump_stack+0x30/0x40 [ 137.415885][ T6590] dump_stack_lvl+0xf4/0x15c [ 137.416649][ T6590] dump_stack+0x1c/0x5c [ 137.417388][ T6590] sysfs_create_dir_ns+0x244/0x264 [ 137.418263][ T6590] kobject_add_internal+0x5ac/0xc3c [ 137.419109][ T6590] kobject_init_and_add+0x124/0x190 [ 137.420007][ T6590] gfs2_sys_fs_add+0x200/0x41c [ 137.420771][ T6590] gfs2_fill_super+0xddc/0x1a18 [ 137.421640][ T6590] get_tree_bdev+0x358/0x544 [ 137.422387][ T6590] gfs2_get_tree+0x54/0x1b4 [ 137.423184][ T6590] vfs_get_tree+0x90/0x274 [ 137.423899][ T6590] do_new_mount+0x228/0x810 [ 137.424634][ T6590] path_mount+0x5bc/0x1008 [ 137.425371][ T6590] __arm64_sys_mount+0x514/0x5f0 [ 137.426232][ T6590] invoke_syscall+0x98/0x2b0 [ 137.427030][ T6590] el0_svc_common+0x138/0x258 [ 137.427851][ T6590] do_el0_svc+0x58/0x13c [ 137.428599][ T6590] el0_svc+0x78/0x1d0 [ 137.429213][ T6590] el0t_64_sync_handler+0xcc/0xe4 [ 137.430039][ T6590] el0t_64_sync+0x1a0/0x1a4 [ 137.467021][ T6590] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 137.472015][ T6590] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 137.474573][ T6590] syz.2.532 (6590): drop_caches: 2 [ 137.488384][ T6597] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.489723][ T6597] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.493926][ T6597] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.507759][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.508953][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.530190][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 21ms [ 137.531375][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.532238][ T6597] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.539738][ T6597] syz.3.533 (6597): drop_caches: 2 [ 137.569846][ T6595] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.571214][ T6595] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.579819][ T6595] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.589729][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.590825][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.611873][ T6592] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 137.613138][ T6592] CPU: 1 PID: 6592 Comm: syz.1.534 Tainted: G B syzkaller #0 [ 137.614441][ T6592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 137.614444][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 137.614455][ T6592] Call trace: [ 137.616238][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.617242][ T6592] dump_backtrace+0x0/0x458 [ 137.619175][ T6592] show_stack+0x2c/0x3c [ 137.619895][ T6592] __dump_stack+0x30/0x40 [ 137.620661][ T6592] dump_stack_lvl+0xf4/0x15c [ 137.621410][ T6592] dump_stack+0x1c/0x5c [ 137.622092][ T6592] sysfs_create_dir_ns+0x244/0x264 [ 137.622917][ T6592] kobject_add_internal+0x5ac/0xc3c [ 137.623781][ T6592] kobject_init_and_add+0x124/0x190 [ 137.624625][ T6592] gfs2_sys_fs_add+0x200/0x41c [ 137.625389][ T6592] gfs2_fill_super+0xddc/0x1a18 [ 137.626157][ T6592] get_tree_bdev+0x358/0x544 [ 137.626902][ T6592] gfs2_get_tree+0x54/0x1b4 [ 137.627643][ T6592] vfs_get_tree+0x90/0x274 [ 137.628426][ T6592] do_new_mount+0x228/0x810 [ 137.629158][ T6592] path_mount+0x5bc/0x1008 [ 137.629960][ T6592] __arm64_sys_mount+0x514/0x5f0 [ 137.630824][ T6592] invoke_syscall+0x98/0x2b0 [ 137.631625][ T6592] el0_svc_common+0x138/0x258 [ 137.632449][ T6592] do_el0_svc+0x58/0x13c [ 137.633112][ T6592] el0_svc+0x78/0x1d0 [ 137.633793][ T6592] el0t_64_sync_handler+0xcc/0xe4 [ 137.634660][ T6592] el0t_64_sync+0x1a0/0x1a4 [ 137.636261][ T6595] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.641296][ T6595] syz.4.535 (6595): drop_caches: 2 [ 137.666309][ T6592] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 137.687395][ T6592] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 137.689740][ T6592] syz.1.534 (6592): drop_caches: 2 [ 137.720319][ T6599] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.721707][ T6599] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.723927][ T6599] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.728036][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.729064][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.752982][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 137.754268][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.755149][ T6599] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.759768][ T6599] syz.0.536 (6599): drop_caches: 2 [ 137.789709][ T6602] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.791102][ T6602] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.793626][ T6602] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.797021][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.798593][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.825264][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 137.826600][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.839388][ T6602] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.842516][ T6602] syz.2.537 (6602): drop_caches: 2 [ 137.913916][ T6604] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 137.915250][ T6604] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 137.924066][ T6604] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 137.925718][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 137.926885][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 137.951792][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 24ms [ 137.953083][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 137.953982][ T6604] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 137.958612][ T6604] syz.3.538 (6604): drop_caches: 2 [ 138.009242][ T6608] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.010592][ T6608] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.012739][ T6608] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.020069][ T6606] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.021210][ T6606] CPU: 0 PID: 6606 Comm: syz.4.539 Tainted: G B syzkaller #0 [ 138.022544][ T6606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.024058][ T6606] Call trace: [ 138.024564][ T6606] dump_backtrace+0x0/0x458 [ 138.025331][ T6606] show_stack+0x2c/0x3c [ 138.026026][ T6606] __dump_stack+0x30/0x40 [ 138.026757][ T6606] dump_stack_lvl+0xf4/0x15c [ 138.027511][ T6606] dump_stack+0x1c/0x5c [ 138.028223][ T6606] sysfs_create_dir_ns+0x244/0x264 [ 138.029027][ T6606] kobject_add_internal+0x5ac/0xc3c [ 138.029839][ T6606] kobject_init_and_add+0x124/0x190 [ 138.030747][ T6606] gfs2_sys_fs_add+0x200/0x41c [ 138.031514][ T6606] gfs2_fill_super+0xddc/0x1a18 [ 138.032333][ T6606] get_tree_bdev+0x358/0x544 [ 138.033109][ T6606] gfs2_get_tree+0x54/0x1b4 [ 138.033812][ T6606] vfs_get_tree+0x90/0x274 [ 138.034502][ T6606] do_new_mount+0x228/0x810 [ 138.035228][ T6606] path_mount+0x5bc/0x1008 [ 138.035973][ T6606] __arm64_sys_mount+0x514/0x5f0 [ 138.036821][ T6606] invoke_syscall+0x98/0x2b0 [ 138.037588][ T6606] el0_svc_common+0x138/0x258 [ 138.038393][ T6606] do_el0_svc+0x58/0x13c [ 138.039092][ T6606] el0_svc+0x78/0x1d0 [ 138.039827][ T6606] el0t_64_sync_handler+0xcc/0xe4 [ 138.040691][ T6606] el0t_64_sync+0x1a0/0x1a4 [ 138.052813][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.053919][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.068114][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 14ms [ 138.069339][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.070197][ T6608] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.074589][ T6608] syz.1.540 (6608): drop_caches: 2 [ 138.101455][ T6606] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.108412][ T6606] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.193484][ T6610] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.194884][ T6610] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.197312][ T6610] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.202733][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.203932][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.209515][ T6606] syz.4.539 (6606): drop_caches: 2 [ 138.239848][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 35ms [ 138.241109][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.241915][ T6610] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.246145][ T6610] syz.0.541 (6610): drop_caches: 2 [ 138.301573][ T6614] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.302828][ T6614] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.307227][ T6614] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.320094][ T6616] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.321301][ T6616] CPU: 0 PID: 6616 Comm: syz.3.543 Tainted: G B syzkaller #0 [ 138.322569][ T6616] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.324096][ T6616] Call trace: [ 138.324699][ T6616] dump_backtrace+0x0/0x458 [ 138.325381][ T6616] show_stack+0x2c/0x3c [ 138.326018][ T6616] __dump_stack+0x30/0x40 [ 138.326702][ T6616] dump_stack_lvl+0xf4/0x15c [ 138.327479][ T6616] dump_stack+0x1c/0x5c [ 138.328224][ T6616] sysfs_create_dir_ns+0x244/0x264 [ 138.329098][ T6616] kobject_add_internal+0x5ac/0xc3c [ 138.329919][ T6616] kobject_init_and_add+0x124/0x190 [ 138.330761][ T6616] gfs2_sys_fs_add+0x200/0x41c [ 138.331550][ T6616] gfs2_fill_super+0xddc/0x1a18 [ 138.332314][ T6616] get_tree_bdev+0x358/0x544 [ 138.333070][ T6616] gfs2_get_tree+0x54/0x1b4 [ 138.333858][ T6616] vfs_get_tree+0x90/0x274 [ 138.334590][ T6616] do_new_mount+0x228/0x810 [ 138.335345][ T6616] path_mount+0x5bc/0x1008 [ 138.336142][ T6616] __arm64_sys_mount+0x514/0x5f0 [ 138.336907][ T6616] invoke_syscall+0x98/0x2b0 [ 138.337645][ T6616] el0_svc_common+0x138/0x258 [ 138.338373][ T6616] do_el0_svc+0x58/0x13c [ 138.339065][ T6616] el0_svc+0x78/0x1d0 [ 138.339712][ T6616] el0t_64_sync_handler+0xcc/0xe4 [ 138.340504][ T6616] el0t_64_sync+0x1a0/0x1a4 [ 138.344440][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.345524][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.368641][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 138.380355][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.381350][ T6614] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.385798][ T6614] syz.2.542 (6614): drop_caches: 2 [ 138.389005][ T6616] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.391247][ T6616] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.400544][ T6616] syz.3.543 (6616): drop_caches: 2 [ 138.410972][ T6618] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.412272][ T6618] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.414892][ T6618] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.420017][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.420036][ T6620] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.421033][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.422261][ T6620] CPU: 1 PID: 6620 Comm: syz.4.545 Tainted: G B syzkaller #0 [ 138.424698][ T6620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.426292][ T6620] Call trace: [ 138.426784][ T6620] dump_backtrace+0x0/0x458 [ 138.427528][ T6620] show_stack+0x2c/0x3c [ 138.428146][ T6620] __dump_stack+0x30/0x40 [ 138.428883][ T6620] dump_stack_lvl+0xf4/0x15c [ 138.429638][ T6620] dump_stack+0x1c/0x5c [ 138.430279][ T6620] sysfs_create_dir_ns+0x244/0x264 [ 138.431102][ T6620] kobject_add_internal+0x5ac/0xc3c [ 138.431990][ T6620] kobject_init_and_add+0x124/0x190 [ 138.432933][ T6620] gfs2_sys_fs_add+0x200/0x41c [ 138.433718][ T6620] gfs2_fill_super+0xddc/0x1a18 [ 138.434496][ T6620] get_tree_bdev+0x358/0x544 [ 138.435303][ T6620] gfs2_get_tree+0x54/0x1b4 [ 138.436103][ T6620] vfs_get_tree+0x90/0x274 [ 138.436829][ T6620] do_new_mount+0x228/0x810 [ 138.437575][ T6620] path_mount+0x5bc/0x1008 [ 138.438326][ T6620] __arm64_sys_mount+0x514/0x5f0 [ 138.439131][ T6620] invoke_syscall+0x98/0x2b0 [ 138.439953][ T6620] el0_svc_common+0x138/0x258 [ 138.440813][ T6620] do_el0_svc+0x58/0x13c [ 138.441532][ T6620] el0_svc+0x78/0x1d0 [ 138.442260][ T6620] el0t_64_sync_handler+0xcc/0xe4 [ 138.443114][ T6620] el0t_64_sync+0x1a0/0x1a4 1970/01/01 00:02:18 executed programs: 541 [ 138.468853][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 47ms [ 138.470080][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.470976][ T6618] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.474840][ T6618] syz.1.544 (6618): drop_caches: 2 [ 138.494511][ T6620] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.496495][ T6620] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.500853][ T6620] syz.4.545 (6620): drop_caches: 2 [ 138.719521][ T6622] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.719910][ T6624] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.720972][ T6622] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.722328][ T6624] CPU: 1 PID: 6624 Comm: syz.2.547 Tainted: G B syzkaller #0 [ 138.724868][ T6624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.726494][ T6624] Call trace: [ 138.727021][ T6624] dump_backtrace+0x0/0x458 [ 138.727801][ T6624] show_stack+0x2c/0x3c [ 138.728520][ T6624] __dump_stack+0x30/0x40 [ 138.729314][ T6624] dump_stack_lvl+0xf4/0x15c [ 138.730117][ T6624] dump_stack+0x1c/0x5c [ 138.730823][ T6624] sysfs_create_dir_ns+0x244/0x264 [ 138.731696][ T6624] kobject_add_internal+0x5ac/0xc3c [ 138.732606][ T6624] kobject_init_and_add+0x124/0x190 [ 138.733426][ T6624] gfs2_sys_fs_add+0x200/0x41c [ 138.734240][ T6624] gfs2_fill_super+0xddc/0x1a18 [ 138.735072][ T6624] get_tree_bdev+0x358/0x544 [ 138.735848][ T6624] gfs2_get_tree+0x54/0x1b4 [ 138.736599][ T6624] vfs_get_tree+0x90/0x274 [ 138.737392][ T6624] do_new_mount+0x228/0x810 [ 138.738155][ T6624] path_mount+0x5bc/0x1008 [ 138.738902][ T6624] __arm64_sys_mount+0x514/0x5f0 [ 138.739711][ T6624] invoke_syscall+0x98/0x2b0 [ 138.740377][ T6624] el0_svc_common+0x138/0x258 [ 138.741132][ T6624] do_el0_svc+0x58/0x13c [ 138.741864][ T6624] el0_svc+0x78/0x1d0 [ 138.742524][ T6624] el0t_64_sync_handler+0xcc/0xe4 [ 138.743351][ T6624] el0t_64_sync+0x1a0/0x1a4 [ 138.747005][ T6622] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.752412][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.753443][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.773793][ T6624] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.776293][ T6624] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.776801][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 138.779683][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.780364][ T6624] syz.2.547 (6624): drop_caches: 2 [ 138.780880][ T6622] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.784637][ T6622] syz.0.546 (6622): drop_caches: 2 [ 138.799000][ T6630] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 138.800337][ T6630] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 138.821562][ T6630] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 138.824842][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 138.825829][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 138.843152][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 17ms [ 138.844480][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 138.848085][ T6626] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.849327][ T6626] CPU: 1 PID: 6626 Comm: syz.3.548 Tainted: G B syzkaller #0 [ 138.850784][ T6626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.852476][ T6626] Call trace: [ 138.853000][ T6626] dump_backtrace+0x0/0x458 [ 138.853728][ T6626] show_stack+0x2c/0x3c [ 138.854450][ T6626] __dump_stack+0x30/0x40 [ 138.855199][ T6626] dump_stack_lvl+0xf4/0x15c [ 138.855488][ T6630] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 138.855981][ T6626] dump_stack+0x1c/0x5c [ 138.857830][ T6626] sysfs_create_dir_ns+0x244/0x264 [ 138.858671][ T6626] kobject_add_internal+0x5ac/0xc3c [ 138.859614][ T6626] kobject_init_and_add+0x124/0x190 [ 138.860476][ T6626] gfs2_sys_fs_add+0x200/0x41c [ 138.861253][ T6626] gfs2_fill_super+0xddc/0x1a18 [ 138.862063][ T6626] get_tree_bdev+0x358/0x544 [ 138.862806][ T6626] gfs2_get_tree+0x54/0x1b4 [ 138.863573][ T6626] vfs_get_tree+0x90/0x274 [ 138.864357][ T6626] do_new_mount+0x228/0x810 [ 138.865111][ T6626] path_mount+0x5bc/0x1008 [ 138.865851][ T6626] __arm64_sys_mount+0x514/0x5f0 [ 138.866742][ T6626] invoke_syscall+0x98/0x2b0 [ 138.867524][ T6626] el0_svc_common+0x138/0x258 [ 138.868318][ T6626] do_el0_svc+0x58/0x13c [ 138.869057][ T6626] el0_svc+0x78/0x1d0 [ 138.869778][ T6626] el0t_64_sync_handler+0xcc/0xe4 [ 138.870618][ T6626] el0t_64_sync+0x1a0/0x1a4 [ 138.873948][ T6630] syz.4.550 (6630): drop_caches: 2 [ 138.879343][ T6628] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 138.880477][ T6628] CPU: 0 PID: 6628 Comm: syz.1.549 Tainted: G B syzkaller #0 [ 138.881929][ T6628] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 138.883656][ T6628] Call trace: [ 138.884177][ T6628] dump_backtrace+0x0/0x458 [ 138.884964][ T6628] show_stack+0x2c/0x3c [ 138.885639][ T6628] __dump_stack+0x30/0x40 [ 138.886302][ T6628] dump_stack_lvl+0xf4/0x15c [ 138.887044][ T6628] dump_stack+0x1c/0x5c [ 138.887766][ T6628] sysfs_create_dir_ns+0x244/0x264 [ 138.888653][ T6628] kobject_add_internal+0x5ac/0xc3c [ 138.889499][ T6628] kobject_init_and_add+0x124/0x190 [ 138.890362][ T6628] gfs2_sys_fs_add+0x200/0x41c [ 138.891149][ T6628] gfs2_fill_super+0xddc/0x1a18 [ 138.891900][ T6628] get_tree_bdev+0x358/0x544 [ 138.892688][ T6628] gfs2_get_tree+0x54/0x1b4 [ 138.893492][ T6628] vfs_get_tree+0x90/0x274 [ 138.894156][ T6628] do_new_mount+0x228/0x810 [ 138.894872][ T6628] path_mount+0x5bc/0x1008 [ 138.895589][ T6628] __arm64_sys_mount+0x514/0x5f0 [ 138.896371][ T6628] invoke_syscall+0x98/0x2b0 [ 138.897279][ T6628] el0_svc_common+0x138/0x258 [ 138.898083][ T6628] do_el0_svc+0x58/0x13c [ 138.898795][ T6628] el0_svc+0x78/0x1d0 [ 138.899455][ T6628] el0t_64_sync_handler+0xcc/0xe4 [ 138.900222][ T6628] el0t_64_sync+0x1a0/0x1a4 [ 138.912985][ T6626] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.915151][ T6626] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.916984][ T6626] syz.3.548 (6626): drop_caches: 2 [ 138.965674][ T6628] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 138.972150][ T6628] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 138.988040][ T6628] syz.1.549 (6628): drop_caches: 2 [ 138.994129][ T6633] syz.2.551 (6633): drop_caches: 2 [ 139.217269][ T6636] syz.4.553 (6636): drop_caches: 2 [ 139.228831][ T6634] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.230161][ T6634] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.235586][ T6634] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.237216][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.238384][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.254809][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 16ms [ 139.256056][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.256925][ T6634] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.263226][ T6638] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 139.264425][ T6638] CPU: 0 PID: 6638 Comm: syz.3.554 Tainted: G B syzkaller #0 [ 139.265787][ T6638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 139.267437][ T6638] Call trace: [ 139.267990][ T6638] dump_backtrace+0x0/0x458 [ 139.268745][ T6638] show_stack+0x2c/0x3c [ 139.269425][ T6638] __dump_stack+0x30/0x40 [ 139.270180][ T6638] dump_stack_lvl+0xf4/0x15c [ 139.270972][ T6638] dump_stack+0x1c/0x5c [ 139.271633][ T6638] sysfs_create_dir_ns+0x244/0x264 [ 139.272473][ T6638] kobject_add_internal+0x5ac/0xc3c [ 139.273301][ T6638] kobject_init_and_add+0x124/0x190 [ 139.274099][ T6638] gfs2_sys_fs_add+0x200/0x41c [ 139.274869][ T6638] gfs2_fill_super+0xddc/0x1a18 [ 139.275570][ T6638] get_tree_bdev+0x358/0x544 [ 139.276284][ T6638] gfs2_get_tree+0x54/0x1b4 [ 139.276978][ T6638] vfs_get_tree+0x90/0x274 [ 139.277707][ T6638] do_new_mount+0x228/0x810 [ 139.278426][ T6638] path_mount+0x5bc/0x1008 [ 139.279102][ T6638] __arm64_sys_mount+0x514/0x5f0 [ 139.279890][ T6638] invoke_syscall+0x98/0x2b0 [ 139.280596][ T6638] el0_svc_common+0x138/0x258 [ 139.281317][ T6638] do_el0_svc+0x58/0x13c [ 139.282020][ T6638] el0_svc+0x78/0x1d0 [ 139.282621][ T6638] el0t_64_sync_handler+0xcc/0xe4 [ 139.283518][ T6638] el0t_64_sync+0x1a0/0x1a4 [ 139.286566][ T6640] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 139.287900][ T6640] CPU: 1 PID: 6640 Comm: syz.2.555 Tainted: G B syzkaller #0 [ 139.288450][ T6638] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 139.289333][ T6640] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 139.291723][ T6638] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 139.293036][ T6640] Call trace: [ 139.294585][ T6640] dump_backtrace+0x0/0x458 [ 139.295360][ T6640] show_stack+0x2c/0x3c [ 139.295515][ T6638] syz.3.554 (6638): drop_caches: 2 [ 139.296051][ T6640] __dump_stack+0x30/0x40 [ 139.297581][ T6640] dump_stack_lvl+0xf4/0x15c [ 139.298370][ T6640] dump_stack+0x1c/0x5c [ 139.299088][ T6640] sysfs_create_dir_ns+0x244/0x264 [ 139.299985][ T6640] kobject_add_internal+0x5ac/0xc3c [ 139.300867][ T6640] kobject_init_and_add+0x124/0x190 [ 139.301818][ T6640] gfs2_sys_fs_add+0x200/0x41c [ 139.302571][ T6640] gfs2_fill_super+0xddc/0x1a18 [ 139.303414][ T6640] get_tree_bdev+0x358/0x544 [ 139.304171][ T6640] gfs2_get_tree+0x54/0x1b4 [ 139.304904][ T6640] vfs_get_tree+0x90/0x274 [ 139.305641][ T6640] do_new_mount+0x228/0x810 [ 139.306412][ T6640] path_mount+0x5bc/0x1008 [ 139.307151][ T6640] __arm64_sys_mount+0x514/0x5f0 [ 139.307981][ T6640] invoke_syscall+0x98/0x2b0 [ 139.308762][ T6640] el0_svc_common+0x138/0x258 [ 139.309473][ T6640] do_el0_svc+0x58/0x13c [ 139.310090][ T6640] el0_svc+0x78/0x1d0 [ 139.310708][ T6640] el0t_64_sync_handler+0xcc/0xe4 [ 139.311498][ T6640] el0t_64_sync+0x1a0/0x1a4 [ 139.341436][ T6634] syz.0.552 (6634): drop_caches: 2 [ 139.344015][ T6640] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 139.346157][ T6640] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 139.351409][ T6640] syz.2.555 (6640): drop_caches: 2 [ 139.368248][ T6642] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.369579][ T6642] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.371995][ T6642] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.373590][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.374627][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.392186][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 17ms [ 139.393386][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.394712][ T6642] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.398782][ T6642] syz.1.556 (6642): drop_caches: 2 [ 139.598540][ T6644] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.600037][ T6644] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.602549][ T6644] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.604171][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.605306][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.618136][ T6646] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 139.619202][ T6646] CPU: 1 PID: 6646 Comm: syz.3.558 Tainted: G B syzkaller #0 [ 139.620694][ T6646] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 139.622442][ T6646] Call trace: [ 139.622967][ T6646] dump_backtrace+0x0/0x458 [ 139.623702][ T6646] show_stack+0x2c/0x3c [ 139.624409][ T6646] __dump_stack+0x30/0x40 [ 139.625123][ T6646] dump_stack_lvl+0xf4/0x15c [ 139.625860][ T6646] dump_stack+0x1c/0x5c [ 139.626521][ T6646] sysfs_create_dir_ns+0x244/0x264 [ 139.627348][ T6646] kobject_add_internal+0x5ac/0xc3c [ 139.628192][ T6646] kobject_init_and_add+0x124/0x190 [ 139.629007][ T6646] gfs2_sys_fs_add+0x200/0x41c [ 139.629842][ T6646] gfs2_fill_super+0xddc/0x1a18 [ 139.630715][ T6646] get_tree_bdev+0x358/0x544 [ 139.631529][ T6646] gfs2_get_tree+0x54/0x1b4 [ 139.632266][ T6646] vfs_get_tree+0x90/0x274 [ 139.633020][ T6646] do_new_mount+0x228/0x810 [ 139.633744][ T6646] path_mount+0x5bc/0x1008 [ 139.634508][ T6646] __arm64_sys_mount+0x514/0x5f0 [ 139.635298][ T6646] invoke_syscall+0x98/0x2b0 [ 139.636066][ T6646] el0_svc_common+0x138/0x258 [ 139.636866][ T6646] do_el0_svc+0x58/0x13c [ 139.637576][ T6646] el0_svc+0x78/0x1d0 [ 139.638209][ T6646] el0t_64_sync_handler+0xcc/0xe4 [ 139.639136][ T6646] el0t_64_sync+0x1a0/0x1a4 [ 139.643800][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 38ms [ 139.645083][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.645950][ T6644] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.653891][ T6644] syz.4.557 (6644): drop_caches: 2 [ 139.661213][ T6646] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 139.663414][ T6646] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 139.695260][ T6650] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.696673][ T6650] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.700007][ T6650] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.702153][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.703270][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.729431][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 26ms [ 139.730677][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.731532][ T6650] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.735250][ T6650] syz.0.559 (6650): drop_caches: 2 [ 139.760661][ T6648] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.761942][ T6648] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.770473][ T6648] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.787519][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.788591][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.807807][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 139.809142][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.809988][ T6648] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.814198][ T6648] syz.2.560 (6648): drop_caches: 2 [ 139.816254][ T6646] syz.3.558 (6646): drop_caches: 2 [ 139.830334][ T6652] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 139.831594][ T6652] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 139.834082][ T6652] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 139.835889][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 139.837045][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 139.856667][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 139.860535][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 139.861353][ T6652] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 139.865501][ T6652] syz.1.561 (6652): drop_caches: 2 [ 140.050085][ T6654] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.051430][ T6654] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.055094][ T6654] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.059438][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.060476][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.084273][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 140.085616][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.086517][ T6654] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.091715][ T6654] syz.4.562 (6654): drop_caches: 2 [ 140.118546][ T6656] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.119855][ T6656] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.122155][ T6656] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.123659][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.124758][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.144586][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 140.145914][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.146783][ T6656] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.152342][ T6656] syz.0.563 (6656): drop_caches: 2 [ 140.175156][ T6658] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.176480][ T6658] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.180105][ T6658] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.185392][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.186406][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.198052][ T6662] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 140.199270][ T6662] CPU: 0 PID: 6662 Comm: syz.1.566 Tainted: G B syzkaller #0 [ 140.199328][ T6660] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 140.200717][ T6662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 140.203601][ T6662] Call trace: [ 140.204151][ T6662] dump_backtrace+0x0/0x458 [ 140.205093][ T6662] show_stack+0x2c/0x3c [ 140.205752][ T6662] __dump_stack+0x30/0x40 [ 140.206491][ T6662] dump_stack_lvl+0xf4/0x15c [ 140.207257][ T6662] dump_stack+0x1c/0x5c [ 140.207943][ T6662] sysfs_create_dir_ns+0x244/0x264 [ 140.208781][ T6662] kobject_add_internal+0x5ac/0xc3c [ 140.209694][ T6662] kobject_init_and_add+0x124/0x190 [ 140.210555][ T6662] gfs2_sys_fs_add+0x200/0x41c [ 140.211355][ T6662] gfs2_fill_super+0xddc/0x1a18 [ 140.212186][ T6662] get_tree_bdev+0x358/0x544 [ 140.213010][ T6662] gfs2_get_tree+0x54/0x1b4 [ 140.213748][ T6662] vfs_get_tree+0x90/0x274 [ 140.214530][ T6662] do_new_mount+0x228/0x810 [ 140.215317][ T6662] path_mount+0x5bc/0x1008 [ 140.216056][ T6662] __arm64_sys_mount+0x514/0x5f0 [ 140.216905][ T6662] invoke_syscall+0x98/0x2b0 [ 140.217707][ T6662] el0_svc_common+0x138/0x258 [ 140.218502][ T6662] do_el0_svc+0x58/0x13c [ 140.219212][ T6662] el0_svc+0x78/0x1d0 [ 140.219921][ T6662] el0t_64_sync_handler+0xcc/0xe4 [ 140.220730][ T6662] el0t_64_sync+0x1a0/0x1a4 [ 140.229293][ T6660] CPU: 1 PID: 6660 Comm: syz.3.565 Tainted: G B syzkaller #0 [ 140.230744][ T6660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 140.232237][ T6660] Call trace: [ 140.232695][ T6660] dump_backtrace+0x0/0x458 [ 140.233464][ T6660] show_stack+0x2c/0x3c [ 140.234151][ T6660] __dump_stack+0x30/0x40 [ 140.234843][ T6660] dump_stack_lvl+0xf4/0x15c [ 140.235615][ T6660] dump_stack+0x1c/0x5c [ 140.236295][ T6660] sysfs_create_dir_ns+0x244/0x264 [ 140.237108][ T6660] kobject_add_internal+0x5ac/0xc3c [ 140.237523][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 51ms [ 140.237956][ T6660] kobject_init_and_add+0x124/0x190 [ 140.239119][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.239877][ T6660] gfs2_sys_fs_add+0x200/0x41c [ 140.240596][ T6658] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.241372][ T6660] gfs2_fill_super+0xddc/0x1a18 [ 140.243240][ T6660] get_tree_bdev+0x358/0x544 [ 140.244038][ T6660] gfs2_get_tree+0x54/0x1b4 [ 140.244704][ T6660] vfs_get_tree+0x90/0x274 [ 140.245406][ T6660] do_new_mount+0x228/0x810 [ 140.246100][ T6660] path_mount+0x5bc/0x1008 [ 140.246870][ T6660] __arm64_sys_mount+0x514/0x5f0 [ 140.247683][ T6660] invoke_syscall+0x98/0x2b0 [ 140.248437][ T6660] el0_svc_common+0x138/0x258 [ 140.249217][ T6660] do_el0_svc+0x58/0x13c [ 140.249935][ T6660] el0_svc+0x78/0x1d0 [ 140.250557][ T6660] el0t_64_sync_handler+0xcc/0xe4 [ 140.251368][ T6660] el0t_64_sync+0x1a0/0x1a4 [ 140.255853][ T6658] syz.2.564 (6658): drop_caches: 2 [ 140.262970][ T6662] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 140.265076][ T6662] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 140.318041][ T6660] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 140.321934][ T6660] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 140.334083][ T6660] syz.3.565 (6660): drop_caches: 2 [ 140.397875][ T6662] syz.1.566 (6662): drop_caches: 2 [ 140.428950][ T6664] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.430419][ T6664] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.432758][ T6664] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.434360][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.435441][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.453432][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 17ms [ 140.454646][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.455544][ T6664] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.461126][ T6664] syz.4.567 (6664): drop_caches: 2 [ 140.496639][ T6666] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.505898][ T6666] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.508452][ T6666] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.510154][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.511222][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.542033][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 30ms [ 140.543268][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.544137][ T6666] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.548353][ T6666] syz.0.568 (6666): drop_caches: 2 [ 140.589092][ T6668] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.590431][ T6668] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.592814][ T6668] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.594387][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.595478][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.618051][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 22ms [ 140.619306][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.620235][ T6668] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.625120][ T6668] syz.2.569 (6668): drop_caches: 2 [ 140.700339][ T6670] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.701692][ T6670] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.704046][ T6670] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.705693][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.706734][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.735183][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 140.736421][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.737296][ T6670] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.742620][ T6670] syz.3.570 (6670): drop_caches: 2 [ 140.758354][ T6672] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 140.759680][ T6672] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 140.762054][ T6672] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 140.765955][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 140.767028][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 140.789644][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 22ms [ 140.791086][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 140.792209][ T6672] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 140.800430][ T6674] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 140.801516][ T6674] CPU: 1 PID: 6674 Comm: syz.4.572 Tainted: G B syzkaller #0 [ 140.802721][ T6674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 140.804272][ T6674] Call trace: [ 140.804813][ T6674] dump_backtrace+0x0/0x458 [ 140.805543][ T6674] show_stack+0x2c/0x3c [ 140.806159][ T6674] __dump_stack+0x30/0x40 [ 140.806790][ T6674] dump_stack_lvl+0xf4/0x15c [ 140.807560][ T6674] dump_stack+0x1c/0x5c [ 140.808310][ T6674] sysfs_create_dir_ns+0x244/0x264 [ 140.809174][ T6674] kobject_add_internal+0x5ac/0xc3c [ 140.810012][ T6674] kobject_init_and_add+0x124/0x190 [ 140.810848][ T6674] gfs2_sys_fs_add+0x200/0x41c [ 140.811631][ T6674] gfs2_fill_super+0xddc/0x1a18 [ 140.812363][ T6674] get_tree_bdev+0x358/0x544 [ 140.813093][ T6674] gfs2_get_tree+0x54/0x1b4 [ 140.813823][ T6674] vfs_get_tree+0x90/0x274 [ 140.814544][ T6674] do_new_mount+0x228/0x810 [ 140.815253][ T6674] path_mount+0x5bc/0x1008 [ 140.815945][ T6674] __arm64_sys_mount+0x514/0x5f0 [ 140.816806][ T6674] invoke_syscall+0x98/0x2b0 [ 140.817623][ T6674] el0_svc_common+0x138/0x258 [ 140.818504][ T6674] do_el0_svc+0x58/0x13c [ 140.819266][ T6674] el0_svc+0x78/0x1d0 [ 140.819904][ T6674] el0t_64_sync_handler+0xcc/0xe4 [ 140.820765][ T6674] el0t_64_sync+0x1a0/0x1a4 [ 140.822967][ T6672] syz.1.571 (6672): drop_caches: 2 [ 140.831941][ T6676] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 140.833214][ T6676] CPU: 0 PID: 6676 Comm: syz.0.573 Tainted: G B syzkaller #0 [ 140.834592][ T6676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 140.836317][ T6676] Call trace: [ 140.836850][ T6676] dump_backtrace+0x0/0x458 [ 140.837637][ T6676] show_stack+0x2c/0x3c [ 140.838304][ T6676] __dump_stack+0x30/0x40 [ 140.839018][ T6676] dump_stack_lvl+0xf4/0x15c [ 140.839773][ T6676] dump_stack+0x1c/0x5c [ 140.840473][ T6676] sysfs_create_dir_ns+0x244/0x264 [ 140.841469][ T6676] kobject_add_internal+0x5ac/0xc3c [ 140.842325][ T6676] kobject_init_and_add+0x124/0x190 [ 140.843200][ T6676] gfs2_sys_fs_add+0x200/0x41c [ 140.844006][ T6676] gfs2_fill_super+0xddc/0x1a18 [ 140.844851][ T6676] get_tree_bdev+0x358/0x544 [ 140.845572][ T6676] gfs2_get_tree+0x54/0x1b4 [ 140.846381][ T6676] vfs_get_tree+0x90/0x274 [ 140.847121][ T6676] do_new_mount+0x228/0x810 [ 140.847881][ T6676] path_mount+0x5bc/0x1008 [ 140.848598][ T6676] __arm64_sys_mount+0x514/0x5f0 [ 140.849437][ T6676] invoke_syscall+0x98/0x2b0 [ 140.850240][ T6676] el0_svc_common+0x138/0x258 [ 140.851008][ T6676] do_el0_svc+0x58/0x13c [ 140.851743][ T6676] el0_svc+0x78/0x1d0 [ 140.852379][ T6676] el0t_64_sync_handler+0xcc/0xe4 [ 140.853169][ T6676] el0t_64_sync+0x1a0/0x1a4 [ 140.884474][ T6676] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 140.888353][ T6676] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 140.890105][ T6676] syz.0.573 (6676): drop_caches: 2 [ 140.896994][ T6674] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 140.912549][ T6674] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 140.915442][ T6674] syz.4.572 (6674): drop_caches: 2 [ 141.061369][ T6678] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.062693][ T6678] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.064780][ T6678] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.084487][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.085531][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.099935][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 14ms [ 141.101193][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.102058][ T6678] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.105422][ T6678] syz.2.574 (6678): drop_caches: 2 [ 141.168999][ T6684] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.170338][ T6684] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.172820][ T6684] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.174414][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.175443][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.178364][ T6682] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 141.179583][ T6682] CPU: 1 PID: 6682 Comm: syz.1.576 Tainted: G B syzkaller #0 [ 141.181075][ T6682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 141.182806][ T6682] Call trace: [ 141.183339][ T6682] dump_backtrace+0x0/0x458 [ 141.184058][ T6682] show_stack+0x2c/0x3c [ 141.184725][ T6682] __dump_stack+0x30/0x40 [ 141.185404][ T6682] dump_stack_lvl+0xf4/0x15c [ 141.186089][ T6682] dump_stack+0x1c/0x5c [ 141.186744][ T6682] sysfs_create_dir_ns+0x244/0x264 [ 141.187598][ T6682] kobject_add_internal+0x5ac/0xc3c [ 141.188468][ T6682] kobject_init_and_add+0x124/0x190 [ 141.189310][ T6682] gfs2_sys_fs_add+0x200/0x41c [ 141.190068][ T6682] gfs2_fill_super+0xddc/0x1a18 [ 141.190852][ T6682] get_tree_bdev+0x358/0x544 [ 141.191630][ T6682] gfs2_get_tree+0x54/0x1b4 [ 141.192384][ T6682] vfs_get_tree+0x90/0x274 [ 141.193065][ T6682] do_new_mount+0x228/0x810 [ 141.193834][ T6682] path_mount+0x5bc/0x1008 [ 141.194552][ T6682] __arm64_sys_mount+0x514/0x5f0 [ 141.195330][ T6682] invoke_syscall+0x98/0x2b0 [ 141.196072][ T6682] el0_svc_common+0x138/0x258 [ 141.196825][ T6682] do_el0_svc+0x58/0x13c [ 141.197446][ T6682] el0_svc+0x78/0x1d0 [ 141.198067][ T6682] el0t_64_sync_handler+0xcc/0xe4 [ 141.198877][ T6682] el0t_64_sync+0x1a0/0x1a4 [ 141.200184][ T6680] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 141.201028][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 25ms [ 141.201255][ T6680] CPU: 1 PID: 6680 Comm: syz.3.575 Tainted: G B syzkaller #0 [ 141.203227][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.203905][ T6680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 141.204748][ T6684] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.206257][ T6680] Call trace: [ 141.207778][ T6680] dump_backtrace+0x0/0x458 [ 141.208429][ T6680] show_stack+0x2c/0x3c [ 141.209016][ T6680] __dump_stack+0x30/0x40 [ 141.209650][ T6680] dump_stack_lvl+0xf4/0x15c [ 141.210411][ T6680] dump_stack+0x1c/0x5c [ 141.211081][ T6680] sysfs_create_dir_ns+0x244/0x264 [ 141.211946][ T6680] kobject_add_internal+0x5ac/0xc3c [ 141.212866][ T6680] kobject_init_and_add+0x124/0x190 [ 141.213695][ T6680] gfs2_sys_fs_add+0x200/0x41c [ 141.214507][ T6680] gfs2_fill_super+0xddc/0x1a18 [ 141.215313][ T6680] get_tree_bdev+0x358/0x544 [ 141.216059][ T6680] gfs2_get_tree+0x54/0x1b4 [ 141.216831][ T6680] vfs_get_tree+0x90/0x274 [ 141.217569][ T6680] do_new_mount+0x228/0x810 [ 141.218294][ T6680] path_mount+0x5bc/0x1008 [ 141.219055][ T6680] __arm64_sys_mount+0x514/0x5f0 [ 141.219956][ T6680] invoke_syscall+0x98/0x2b0 [ 141.220694][ T6680] el0_svc_common+0x138/0x258 [ 141.221534][ T6680] do_el0_svc+0x58/0x13c [ 141.221782][ T6684] syz.0.577 (6684): drop_caches: 2 [ 141.222278][ T6680] el0_svc+0x78/0x1d0 [ 141.223850][ T6680] el0t_64_sync_handler+0xcc/0xe4 [ 141.224670][ T6680] el0t_64_sync+0x1a0/0x1a4 [ 141.253767][ T6682] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 141.255828][ T6682] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 141.257985][ T6682] syz.1.576 (6682): drop_caches: 2 [ 141.259316][ T6680] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 141.261407][ T6680] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 141.280983][ T6680] syz.3.575 (6680): drop_caches: 2 [ 141.295551][ T6686] set_capacity_and_notify: 47 callbacks suppressed [ 141.295560][ T6686] loop4: detected capacity change from 0 to 32768 [ 141.368188][ T6686] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.369481][ T6686] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.371618][ T6686] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.373132][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.374157][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.393355][ T6688] loop2: detected capacity change from 0 to 32768 [ 141.397562][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 141.398907][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.399704][ T6686] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.404279][ T6686] syz.4.578 (6686): drop_caches: 2 [ 141.470263][ T6688] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.471566][ T6688] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.473816][ T6688] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.475478][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.476538][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.509980][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 33ms [ 141.511283][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.512162][ T6688] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.514584][ T6694] loop0: detected capacity change from 0 to 32768 [ 141.516111][ T6688] syz.2.579 (6688): drop_caches: 2 [ 141.537734][ T6694] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.538994][ T6694] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.543655][ T6694] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.557582][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.558627][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.578387][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 141.579665][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.580522][ T6693] loop3: detected capacity change from 0 to 32768 [ 141.580548][ T6694] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.585035][ T6690] loop1: detected capacity change from 0 to 32768 [ 141.589041][ T6694] syz.0.580 (6694): drop_caches: 2 [ 141.608381][ T6693] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.609777][ T6693] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.612006][ T6693] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.613804][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.614857][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.631293][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 16ms [ 141.632623][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.633528][ T6693] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.642634][ T6693] syz.3.582 (6693): drop_caches: 2 [ 141.648486][ T6690] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 141.649622][ T6690] CPU: 0 PID: 6690 Comm: syz.1.581 Tainted: G B syzkaller #0 [ 141.651023][ T6690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 141.652729][ T6690] Call trace: [ 141.653263][ T6690] dump_backtrace+0x0/0x458 [ 141.653958][ T6690] show_stack+0x2c/0x3c [ 141.654644][ T6690] __dump_stack+0x30/0x40 [ 141.655319][ T6690] dump_stack_lvl+0xf4/0x15c [ 141.656135][ T6690] dump_stack+0x1c/0x5c [ 141.656827][ T6690] sysfs_create_dir_ns+0x244/0x264 [ 141.657693][ T6690] kobject_add_internal+0x5ac/0xc3c [ 141.658602][ T6690] kobject_init_and_add+0x124/0x190 [ 141.659521][ T6690] gfs2_sys_fs_add+0x200/0x41c [ 141.660356][ T6690] gfs2_fill_super+0xddc/0x1a18 [ 141.661225][ T6690] get_tree_bdev+0x358/0x544 [ 141.661996][ T6690] gfs2_get_tree+0x54/0x1b4 [ 141.662784][ T6690] vfs_get_tree+0x90/0x274 [ 141.663490][ T6690] do_new_mount+0x228/0x810 [ 141.664234][ T6690] path_mount+0x5bc/0x1008 [ 141.664972][ T6690] __arm64_sys_mount+0x514/0x5f0 [ 141.665831][ T6690] invoke_syscall+0x98/0x2b0 [ 141.666620][ T6690] el0_svc_common+0x138/0x258 [ 141.667370][ T6690] do_el0_svc+0x58/0x13c [ 141.668108][ T6690] el0_svc+0x78/0x1d0 [ 141.668725][ T6690] el0t_64_sync_handler+0xcc/0xe4 [ 141.669565][ T6690] el0t_64_sync+0x1a0/0x1a4 [ 141.727462][ T6690] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 141.729612][ T6690] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 141.741020][ T6690] syz.1.581 (6690): drop_caches: 2 [ 141.789456][ T6696] loop4: detected capacity change from 0 to 32768 [ 141.829826][ T6696] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.831077][ T6696] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.833267][ T6696] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.838025][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.839018][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.840273][ T6698] loop2: detected capacity change from 0 to 32768 [ 141.867507][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 141.868764][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.869552][ T6696] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 141.872084][ T6698] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 141.873295][ T6698] CPU: 1 PID: 6698 Comm: syz.2.584 Tainted: G B syzkaller #0 [ 141.874834][ T6698] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 141.876537][ T6698] Call trace: [ 141.877118][ T6698] dump_backtrace+0x0/0x458 [ 141.877866][ T6698] show_stack+0x2c/0x3c [ 141.878526][ T6698] __dump_stack+0x30/0x40 [ 141.879209][ T6698] dump_stack_lvl+0xf4/0x15c [ 141.879928][ T6698] dump_stack+0x1c/0x5c [ 141.880553][ T6698] sysfs_create_dir_ns+0x244/0x264 [ 141.881411][ T6698] kobject_add_internal+0x5ac/0xc3c [ 141.882277][ T6698] kobject_init_and_add+0x124/0x190 [ 141.883146][ T6698] gfs2_sys_fs_add+0x200/0x41c [ 141.884009][ T6698] gfs2_fill_super+0xddc/0x1a18 [ 141.884842][ T6698] get_tree_bdev+0x358/0x544 [ 141.885621][ T6698] gfs2_get_tree+0x54/0x1b4 [ 141.886392][ T6698] vfs_get_tree+0x90/0x274 [ 141.887166][ T6698] do_new_mount+0x228/0x810 [ 141.887895][ T6698] path_mount+0x5bc/0x1008 [ 141.888591][ T6698] __arm64_sys_mount+0x514/0x5f0 [ 141.889419][ T6698] invoke_syscall+0x98/0x2b0 [ 141.890207][ T6698] el0_svc_common+0x138/0x258 [ 141.891002][ T6698] do_el0_svc+0x58/0x13c [ 141.891778][ T6698] el0_svc+0x78/0x1d0 [ 141.892446][ T6698] el0t_64_sync_handler+0xcc/0xe4 [ 141.893252][ T6698] el0t_64_sync+0x1a0/0x1a4 [ 141.898397][ T6696] syz.4.583 (6696): drop_caches: 2 [ 141.912208][ T6700] loop0: detected capacity change from 0 to 32768 [ 141.950707][ T6698] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 141.952897][ T6698] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 141.959799][ T6700] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 141.961112][ T6700] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 141.963425][ T6700] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 141.965058][ T4084] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 141.966109][ T4084] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 141.971367][ T6698] syz.2.584 (6698): drop_caches: 2 [ 141.983188][ T6704] loop3: detected capacity change from 0 to 32768 [ 141.995365][ T4084] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 29ms [ 141.996676][ T4084] gfs2: fsid=syz:syz.0: jid=0: Done [ 141.999463][ T6700] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.002336][ T6700] syz.0.585 (6700): drop_caches: 2 [ 142.047744][ T6704] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 142.049132][ T6704] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 142.050850][ T6702] loop1: detected capacity change from 0 to 32768 [ 142.052679][ T6704] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 142.054304][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 142.055303][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 142.075218][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 19ms [ 142.076557][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 142.077980][ T6704] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.090064][ T6704] syz.3.586 (6704): drop_caches: 2 [ 142.109481][ T6702] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 142.110892][ T6702] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 142.120209][ T6702] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 142.121881][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 142.122936][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 142.165975][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 43ms [ 142.167619][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 142.168422][ T6702] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.172110][ T6702] syz.1.587 (6702): drop_caches: 2 [ 142.369776][ T6706] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 142.371163][ T6706] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 142.373488][ T6706] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 142.375377][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 142.376412][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 142.388587][ T6710] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.389821][ T6710] CPU: 0 PID: 6710 Comm: syz.0.590 Tainted: G B syzkaller #0 [ 142.389941][ T6708] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.391303][ T6710] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.393822][ T6712] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.394045][ T6710] Call trace: [ 142.395725][ T6710] dump_backtrace+0x0/0x458 [ 142.396486][ T6710] show_stack+0x2c/0x3c [ 142.397188][ T6710] __dump_stack+0x30/0x40 [ 142.397926][ T6710] dump_stack_lvl+0xf4/0x15c [ 142.398707][ T6710] dump_stack+0x1c/0x5c [ 142.399360][ T6710] sysfs_create_dir_ns+0x244/0x264 [ 142.400253][ T6710] kobject_add_internal+0x5ac/0xc3c [ 142.401199][ T6710] kobject_init_and_add+0x124/0x190 [ 142.402035][ T6710] gfs2_sys_fs_add+0x200/0x41c [ 142.402797][ T6710] gfs2_fill_super+0xddc/0x1a18 [ 142.403616][ T6710] get_tree_bdev+0x358/0x544 [ 142.404435][ T6710] gfs2_get_tree+0x54/0x1b4 [ 142.405139][ T6710] vfs_get_tree+0x90/0x274 [ 142.405855][ T6710] do_new_mount+0x228/0x810 [ 142.406622][ T6710] path_mount+0x5bc/0x1008 [ 142.407363][ T6710] __arm64_sys_mount+0x514/0x5f0 [ 142.408143][ T6710] invoke_syscall+0x98/0x2b0 [ 142.408916][ T6710] el0_svc_common+0x138/0x258 [ 142.409725][ T6710] do_el0_svc+0x58/0x13c [ 142.410432][ T6710] el0_svc+0x78/0x1d0 [ 142.411161][ T6710] el0t_64_sync_handler+0xcc/0xe4 [ 142.411965][ T6710] el0t_64_sync+0x1a0/0x1a4 [ 142.413976][ T6714] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.415074][ T6714] CPU: 0 PID: 6714 Comm: syz.1.592 Tainted: G B syzkaller #0 [ 142.416506][ T6714] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.418106][ T6714] Call trace: [ 142.418635][ T6714] dump_backtrace+0x0/0x458 [ 142.419353][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 42ms [ 142.419408][ T6714] show_stack+0x2c/0x3c [ 142.420742][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 142.421343][ T6714] __dump_stack+0x30/0x40 [ 142.422814][ T6714] dump_stack_lvl+0xf4/0x15c [ 142.423543][ T6714] dump_stack+0x1c/0x5c [ 142.424203][ T6714] sysfs_create_dir_ns+0x244/0x264 [ 142.424981][ T6714] kobject_add_internal+0x5ac/0xc3c [ 142.425784][ T6714] kobject_init_and_add+0x124/0x190 [ 142.426712][ T6714] gfs2_sys_fs_add+0x200/0x41c [ 142.427557][ T6714] gfs2_fill_super+0xddc/0x1a18 [ 142.428396][ T6714] get_tree_bdev+0x358/0x544 [ 142.429183][ T6714] gfs2_get_tree+0x54/0x1b4 [ 142.429948][ T6714] vfs_get_tree+0x90/0x274 [ 142.430719][ T6714] do_new_mount+0x228/0x810 [ 142.431475][ T6714] path_mount+0x5bc/0x1008 [ 142.432221][ T6714] __arm64_sys_mount+0x514/0x5f0 [ 142.433085][ T6714] invoke_syscall+0x98/0x2b0 [ 142.433866][ T6714] el0_svc_common+0x138/0x258 [ 142.434662][ T6714] do_el0_svc+0x58/0x13c [ 142.435417][ T6714] el0_svc+0x78/0x1d0 [ 142.436106][ T6714] el0t_64_sync_handler+0xcc/0xe4 [ 142.436961][ T6714] el0t_64_sync+0x1a0/0x1a4 [ 142.437846][ T6706] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.438793][ T6708] CPU: 1 PID: 6708 Comm: syz.2.589 Tainted: G B syzkaller #0 [ 142.440376][ T6708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.441201][ T6706] syz.4.588 (6706): drop_caches: 2 [ 142.441984][ T6708] Call trace: [ 142.443291][ T6708] dump_backtrace+0x0/0x458 [ 142.444060][ T6708] show_stack+0x2c/0x3c [ 142.444735][ T6708] __dump_stack+0x30/0x40 [ 142.445412][ T6708] dump_stack_lvl+0xf4/0x15c [ 142.446138][ T6708] dump_stack+0x1c/0x5c [ 142.446821][ T6708] sysfs_create_dir_ns+0x244/0x264 [ 142.447546][ T6708] kobject_add_internal+0x5ac/0xc3c [ 142.448320][ T6708] kobject_init_and_add+0x124/0x190 [ 142.449157][ T6708] gfs2_sys_fs_add+0x200/0x41c [ 142.449882][ T6708] gfs2_fill_super+0xddc/0x1a18 [ 142.450656][ T6708] get_tree_bdev+0x358/0x544 [ 142.451447][ T6708] gfs2_get_tree+0x54/0x1b4 [ 142.452163][ T6708] vfs_get_tree+0x90/0x274 [ 142.452867][ T6708] do_new_mount+0x228/0x810 [ 142.453594][ T6708] path_mount+0x5bc/0x1008 [ 142.454287][ T6708] __arm64_sys_mount+0x514/0x5f0 [ 142.455155][ T6708] invoke_syscall+0x98/0x2b0 [ 142.455925][ T6708] el0_svc_common+0x138/0x258 [ 142.456713][ T6708] do_el0_svc+0x58/0x13c [ 142.457406][ T6708] el0_svc+0x78/0x1d0 [ 142.458066][ T6708] el0t_64_sync_handler+0xcc/0xe4 [ 142.458891][ T6708] el0t_64_sync+0x1a0/0x1a4 [ 142.462397][ T6712] CPU: 1 PID: 6712 Comm: syz.3.591 Tainted: G B syzkaller #0 [ 142.463759][ T6712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.465289][ T6712] Call trace: [ 142.465767][ T6712] dump_backtrace+0x0/0x458 [ 142.466029][ T6714] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.466548][ T6712] show_stack+0x2c/0x3c [ 142.469441][ T6712] __dump_stack+0x30/0x40 [ 142.470153][ T6712] dump_stack_lvl+0xf4/0x15c [ 142.470917][ T6712] dump_stack+0x1c/0x5c [ 142.471170][ T6714] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.471649][ T6712] sysfs_create_dir_ns+0x244/0x264 [ 142.473323][ T6710] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.473538][ T6712] kobject_add_internal+0x5ac/0xc3c [ 142.475714][ T6710] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.476533][ T6712] kobject_init_and_add+0x124/0x190 [ 142.478436][ T6712] gfs2_sys_fs_add+0x200/0x41c [ 142.479311][ T6712] gfs2_fill_super+0xddc/0x1a18 [ 142.480191][ T6712] get_tree_bdev+0x358/0x544 [ 142.480996][ T6712] gfs2_get_tree+0x54/0x1b4 [ 142.481025][ T6714] syz.1.592 (6714): drop_caches: 2 [ 142.481748][ T6712] vfs_get_tree+0x90/0x274 [ 142.483321][ T6712] do_new_mount+0x228/0x810 [ 142.484079][ T6712] path_mount+0x5bc/0x1008 [ 142.484775][ T6712] __arm64_sys_mount+0x514/0x5f0 [ 142.485612][ T6712] invoke_syscall+0x98/0x2b0 [ 142.486366][ T6712] el0_svc_common+0x138/0x258 [ 142.486988][ T6710] syz.0.590 (6710): drop_caches: 2 [ 142.487059][ T6712] do_el0_svc+0x58/0x13c [ 142.488553][ T6712] el0_svc+0x78/0x1d0 [ 142.489170][ T6712] el0t_64_sync_handler+0xcc/0xe4 [ 142.489909][ T6712] el0t_64_sync+0x1a0/0x1a4 [ 142.503312][ T6712] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.504799][ T6708] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.513358][ T6712] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.514895][ T6708] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.515369][ T6712] syz.3.591 (6712): drop_caches: 2 [ 142.529733][ T6708] syz.2.589 (6708): drop_caches: 2 [ 142.810386][ T6718] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 142.811708][ T6718] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 142.813937][ T6718] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 142.815567][ T4890] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 142.816664][ T4890] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 142.818560][ T6716] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.819704][ T6716] CPU: 0 PID: 6716 Comm: syz.1.594 Tainted: G B syzkaller #0 [ 142.821134][ T6716] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.822783][ T6716] Call trace: [ 142.823339][ T6716] dump_backtrace+0x0/0x458 [ 142.824099][ T6716] show_stack+0x2c/0x3c [ 142.824812][ T6716] __dump_stack+0x30/0x40 [ 142.825570][ T6716] dump_stack_lvl+0xf4/0x15c [ 142.826305][ T6716] dump_stack+0x1c/0x5c [ 142.826947][ T6716] sysfs_create_dir_ns+0x244/0x264 [ 142.827812][ T6716] kobject_add_internal+0x5ac/0xc3c [ 142.828699][ T6716] kobject_init_and_add+0x124/0x190 [ 142.829495][ T6716] gfs2_sys_fs_add+0x200/0x41c [ 142.830221][ T6716] gfs2_fill_super+0xddc/0x1a18 [ 142.830234][ T6724] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.832062][ T6716] get_tree_bdev+0x358/0x544 [ 142.832836][ T6716] gfs2_get_tree+0x54/0x1b4 [ 142.833589][ T6716] vfs_get_tree+0x90/0x274 [ 142.834286][ T6716] do_new_mount+0x228/0x810 [ 142.834950][ T6716] path_mount+0x5bc/0x1008 [ 142.835613][ T6716] __arm64_sys_mount+0x514/0x5f0 [ 142.836441][ T6716] invoke_syscall+0x98/0x2b0 [ 142.837255][ T6716] el0_svc_common+0x138/0x258 [ 142.838042][ T6716] do_el0_svc+0x58/0x13c [ 142.838707][ T6716] el0_svc+0x78/0x1d0 [ 142.839375][ T6716] el0t_64_sync_handler+0xcc/0xe4 [ 142.840230][ T6716] el0t_64_sync+0x1a0/0x1a4 [ 142.840967][ T6724] CPU: 1 PID: 6724 Comm: syz.2.597 Tainted: G B syzkaller #0 [ 142.841225][ T6720] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 142.842420][ T6724] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.845304][ T6724] Call trace: [ 142.845826][ T6724] dump_backtrace+0x0/0x458 [ 142.846612][ T6724] show_stack+0x2c/0x3c [ 142.847270][ T6724] __dump_stack+0x30/0x40 [ 142.847998][ T6724] dump_stack_lvl+0xf4/0x15c [ 142.848728][ T6724] dump_stack+0x1c/0x5c [ 142.849409][ T6724] sysfs_create_dir_ns+0x244/0x264 [ 142.850281][ T6724] kobject_add_internal+0x5ac/0xc3c [ 142.851168][ T6724] kobject_init_and_add+0x124/0x190 [ 142.852047][ T6724] gfs2_sys_fs_add+0x200/0x41c [ 142.852866][ T6724] gfs2_fill_super+0xddc/0x1a18 [ 142.853691][ T6724] get_tree_bdev+0x358/0x544 [ 142.854455][ T6724] gfs2_get_tree+0x54/0x1b4 [ 142.855219][ T6724] vfs_get_tree+0x90/0x274 [ 142.855985][ T6724] do_new_mount+0x228/0x810 [ 142.856816][ T6724] path_mount+0x5bc/0x1008 [ 142.857567][ T6724] __arm64_sys_mount+0x514/0x5f0 [ 142.858457][ T6724] invoke_syscall+0x98/0x2b0 [ 142.859257][ T6724] el0_svc_common+0x138/0x258 [ 142.860044][ T6724] do_el0_svc+0x58/0x13c [ 142.860795][ T6724] el0_svc+0x78/0x1d0 [ 142.861484][ T6724] el0t_64_sync_handler+0xcc/0xe4 [ 142.862312][ T6724] el0t_64_sync+0x1a0/0x1a4 [ 142.863031][ T6720] CPU: 0 PID: 6720 Comm: syz.0.595 Tainted: G B syzkaller #0 [ 142.864358][ T6720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 142.865939][ T6720] Call trace: [ 142.866445][ T6720] dump_backtrace+0x0/0x458 [ 142.867194][ T6720] show_stack+0x2c/0x3c [ 142.867862][ T6720] __dump_stack+0x30/0x40 [ 142.868459][ T4890] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 51ms [ 142.868610][ T6720] dump_stack_lvl+0xf4/0x15c [ 142.869861][ T4890] gfs2: fsid=syz:syz.0: jid=0: Done [ 142.870513][ T6720] dump_stack+0x1c/0x5c [ 142.871328][ T6718] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.871991][ T6720] sysfs_create_dir_ns+0x244/0x264 [ 142.873954][ T6720] kobject_add_internal+0x5ac/0xc3c [ 142.874336][ T6724] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.874872][ T6720] kobject_init_and_add+0x124/0x190 [ 142.877952][ T6720] gfs2_sys_fs_add+0x200/0x41c [ 142.878733][ T6720] gfs2_fill_super+0xddc/0x1a18 [ 142.879522][ T6720] get_tree_bdev+0x358/0x544 [ 142.880228][ T6720] gfs2_get_tree+0x54/0x1b4 [ 142.880410][ T6724] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.880997][ T6720] vfs_get_tree+0x90/0x274 [ 142.882168][ T6716] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.882730][ T6720] do_new_mount+0x228/0x810 [ 142.884772][ T6716] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.885451][ T6720] path_mount+0x5bc/0x1008 [ 142.887208][ T6720] __arm64_sys_mount+0x514/0x5f0 [ 142.887970][ T6720] invoke_syscall+0x98/0x2b0 [ 142.888759][ T6720] el0_svc_common+0x138/0x258 [ 142.889567][ T6720] do_el0_svc+0x58/0x13c [ 142.890310][ T6720] el0_svc+0x78/0x1d0 [ 142.890326][ T6718] syz.4.593 (6718): drop_caches: 2 [ 142.890935][ T6720] el0t_64_sync_handler+0xcc/0xe4 [ 142.892613][ T6720] el0t_64_sync+0x1a0/0x1a4 [ 142.898311][ T6720] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 142.899743][ T6722] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 142.900437][ T6720] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 142.901738][ T6722] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 142.905187][ T6722] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 142.906779][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 142.908081][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 142.917666][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 9ms [ 142.918897][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 142.919770][ T6722] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 142.923335][ T6722] syz.3.596 (6722): drop_caches: 2 [ 142.975783][ T6724] syz.2.597 (6724): drop_caches: 2 [ 143.008010][ T6720] syz.0.595 (6720): drop_caches: 2 [ 143.008424][ T6716] syz.1.594 (6716): drop_caches: 2 [ 143.307982][ T6733] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 143.309533][ T6733] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 143.312362][ T6733] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 143.314101][ T4167] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 143.315180][ T4167] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 143.330782][ T4167] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 15ms [ 143.332209][ T4167] gfs2: fsid=syz:syz.0: jid=0: Done [ 143.333029][ T6733] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 143.336142][ T6733] syz.0.602 (6733): drop_caches: 2 [ 143.341546][ T6726] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.341563][ T6728] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.342706][ T6726] CPU: 1 PID: 6726 Comm: syz.4.598 Tainted: G B syzkaller #0 [ 143.342719][ T6726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.347054][ T6726] Call trace: [ 143.347598][ T6726] dump_backtrace+0x0/0x458 [ 143.348328][ T6726] show_stack+0x2c/0x3c [ 143.349023][ T6726] __dump_stack+0x30/0x40 [ 143.349745][ T6726] dump_stack_lvl+0xf4/0x15c [ 143.350450][ T6726] dump_stack+0x1c/0x5c [ 143.351127][ T6726] sysfs_create_dir_ns+0x244/0x264 [ 143.351917][ T6726] kobject_add_internal+0x5ac/0xc3c [ 143.352822][ T6726] kobject_init_and_add+0x124/0x190 [ 143.353672][ T6726] gfs2_sys_fs_add+0x200/0x41c [ 143.354465][ T6726] gfs2_fill_super+0xddc/0x1a18 [ 143.355334][ T6726] get_tree_bdev+0x358/0x544 [ 143.356115][ T6726] gfs2_get_tree+0x54/0x1b4 [ 143.356856][ T6726] vfs_get_tree+0x90/0x274 [ 143.357567][ T6726] do_new_mount+0x228/0x810 [ 143.358295][ T6726] path_mount+0x5bc/0x1008 [ 143.359025][ T6726] __arm64_sys_mount+0x514/0x5f0 [ 143.359894][ T6726] invoke_syscall+0x98/0x2b0 [ 143.360604][ T6726] el0_svc_common+0x138/0x258 [ 143.361377][ T6726] do_el0_svc+0x58/0x13c [ 143.362087][ T6726] el0_svc+0x78/0x1d0 [ 143.362725][ T6726] el0t_64_sync_handler+0xcc/0xe4 [ 143.363539][ T6726] el0t_64_sync+0x1a0/0x1a4 [ 143.364246][ T6728] CPU: 0 PID: 6728 Comm: syz.2.600 Tainted: G B syzkaller #0 [ 143.364713][ T6734] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.365708][ T6728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.368496][ T6728] Call trace: [ 143.369071][ T6728] dump_backtrace+0x0/0x458 [ 143.369854][ T6728] show_stack+0x2c/0x3c [ 143.370578][ T6728] __dump_stack+0x30/0x40 [ 143.371383][ T6728] dump_stack_lvl+0xf4/0x15c [ 143.372207][ T6728] dump_stack+0x1c/0x5c [ 143.372898][ T6728] sysfs_create_dir_ns+0x244/0x264 [ 143.373679][ T6728] kobject_add_internal+0x5ac/0xc3c [ 143.374586][ T6728] kobject_init_and_add+0x124/0x190 [ 143.375493][ T6728] gfs2_sys_fs_add+0x200/0x41c [ 143.376397][ T6728] gfs2_fill_super+0xddc/0x1a18 [ 143.377181][ T6728] get_tree_bdev+0x358/0x544 [ 143.377917][ T6728] gfs2_get_tree+0x54/0x1b4 [ 143.378708][ T6728] vfs_get_tree+0x90/0x274 [ 143.379427][ T6728] do_new_mount+0x228/0x810 [ 143.380127][ T6728] path_mount+0x5bc/0x1008 [ 143.380859][ T6728] __arm64_sys_mount+0x514/0x5f0 [ 143.381584][ T6728] invoke_syscall+0x98/0x2b0 [ 143.382290][ T6728] el0_svc_common+0x138/0x258 [ 143.382977][ T6728] do_el0_svc+0x58/0x13c [ 143.383659][ T6728] el0_svc+0x78/0x1d0 [ 143.384284][ T6728] el0t_64_sync_handler+0xcc/0xe4 [ 143.385026][ T6728] el0t_64_sync+0x1a0/0x1a4 [ 143.385726][ T6734] CPU: 1 PID: 6734 Comm: syz.1.601 Tainted: G B syzkaller #0 [ 143.387116][ T6734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.388677][ T6734] Call trace: [ 143.389195][ T6734] dump_backtrace+0x0/0x458 [ 143.389889][ T6734] show_stack+0x2c/0x3c [ 143.390487][ T6734] __dump_stack+0x30/0x40 [ 143.391157][ T6734] dump_stack_lvl+0xf4/0x15c [ 143.391298][ T6730] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.391857][ T6734] dump_stack+0x1c/0x5c [ 143.393640][ T6734] sysfs_create_dir_ns+0x244/0x264 [ 143.394464][ T6734] kobject_add_internal+0x5ac/0xc3c [ 143.395348][ T6734] kobject_init_and_add+0x124/0x190 [ 143.396190][ T6734] gfs2_sys_fs_add+0x200/0x41c [ 143.396921][ T6734] gfs2_fill_super+0xddc/0x1a18 [ 143.397730][ T6734] get_tree_bdev+0x358/0x544 [ 143.398485][ T6734] gfs2_get_tree+0x54/0x1b4 [ 143.399236][ T6734] vfs_get_tree+0x90/0x274 [ 143.399963][ T6734] do_new_mount+0x228/0x810 [ 143.400691][ T6734] path_mount+0x5bc/0x1008 [ 143.401393][ T6734] __arm64_sys_mount+0x514/0x5f0 [ 143.402227][ T6734] invoke_syscall+0x98/0x2b0 [ 143.402952][ T6734] el0_svc_common+0x138/0x258 [ 143.403768][ T6734] do_el0_svc+0x58/0x13c [ 143.404454][ T6734] el0_svc+0x78/0x1d0 [ 143.405143][ T6734] el0t_64_sync_handler+0xcc/0xe4 [ 143.405937][ T6734] el0t_64_sync+0x1a0/0x1a4 [ 143.407223][ T6730] CPU: 0 PID: 6730 Comm: syz.3.599 Tainted: G B syzkaller #0 [ 143.407742][ T6728] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.408530][ T6730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.410704][ T6728] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.412163][ T6730] Call trace: [ 143.413627][ T6730] dump_backtrace+0x0/0x458 [ 143.414320][ T6730] show_stack+0x2c/0x3c [ 143.414983][ T6730] __dump_stack+0x30/0x40 [ 143.415654][ T6730] dump_stack_lvl+0xf4/0x15c [ 143.416332][ T6730] dump_stack+0x1c/0x5c [ 143.416973][ T6730] sysfs_create_dir_ns+0x244/0x264 [ 143.417787][ T6730] kobject_add_internal+0x5ac/0xc3c [ 143.418608][ T6730] kobject_init_and_add+0x124/0x190 [ 143.419483][ T6730] gfs2_sys_fs_add+0x200/0x41c [ 143.420272][ T6730] gfs2_fill_super+0xddc/0x1a18 [ 143.421083][ T6730] get_tree_bdev+0x358/0x544 [ 143.421784][ T6730] gfs2_get_tree+0x54/0x1b4 [ 143.422485][ T6730] vfs_get_tree+0x90/0x274 [ 143.423138][ T6730] do_new_mount+0x228/0x810 [ 143.423819][ T6730] path_mount+0x5bc/0x1008 [ 143.424543][ T6730] __arm64_sys_mount+0x514/0x5f0 [ 143.425329][ T6730] invoke_syscall+0x98/0x2b0 [ 143.425991][ T6730] el0_svc_common+0x138/0x258 [ 143.426714][ T6730] do_el0_svc+0x58/0x13c [ 143.427310][ T6730] el0_svc+0x78/0x1d0 [ 143.427930][ T6730] el0t_64_sync_handler+0xcc/0xe4 [ 143.428689][ T6730] el0t_64_sync+0x1a0/0x1a4 [ 143.431986][ T6726] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.432534][ T6734] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.434055][ T6726] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.436099][ T6734] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.438914][ T6726] syz.4.598 (6726): drop_caches: 2 [ 143.441091][ T6730] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.443224][ T6730] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.444946][ T6728] syz.2.600 (6728): drop_caches: 2 [ 143.445138][ T6730] syz.3.599 (6730): drop_caches: 2 [ 143.458833][ T6734] syz.1.601 (6734): drop_caches: 2 1970/01/01 00:02:23 executed programs: 598 [ 143.760801][ T6740] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 143.762148][ T6740] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 143.764280][ T6740] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 143.766165][ T4881] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 143.767393][ T4881] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 143.778176][ T6739] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.779358][ T6739] CPU: 1 PID: 6739 Comm: syz.2.606 Tainted: G B syzkaller #0 [ 143.780693][ T6739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.782296][ T6739] Call trace: [ 143.782834][ T6739] dump_backtrace+0x0/0x458 [ 143.783571][ T6739] show_stack+0x2c/0x3c [ 143.784190][ T6739] __dump_stack+0x30/0x40 [ 143.784870][ T6739] dump_stack_lvl+0xf4/0x15c [ 143.785570][ T6739] dump_stack+0x1c/0x5c [ 143.786157][ T6739] sysfs_create_dir_ns+0x244/0x264 [ 143.786903][ T6739] kobject_add_internal+0x5ac/0xc3c [ 143.787724][ T6739] kobject_init_and_add+0x124/0x190 [ 143.788501][ T6739] gfs2_sys_fs_add+0x200/0x41c [ 143.789280][ T6739] gfs2_fill_super+0xddc/0x1a18 [ 143.790059][ T6739] get_tree_bdev+0x358/0x544 [ 143.790782][ T6739] gfs2_get_tree+0x54/0x1b4 [ 143.791464][ T6739] vfs_get_tree+0x90/0x274 [ 143.792120][ T6739] do_new_mount+0x228/0x810 [ 143.792770][ T6739] path_mount+0x5bc/0x1008 [ 143.793529][ T6739] __arm64_sys_mount+0x514/0x5f0 [ 143.794390][ T6739] invoke_syscall+0x98/0x2b0 [ 143.795176][ T6739] el0_svc_common+0x138/0x258 [ 143.795974][ T6739] do_el0_svc+0x58/0x13c [ 143.796661][ T6739] el0_svc+0x78/0x1d0 [ 143.797307][ T6739] el0t_64_sync_handler+0xcc/0xe4 [ 143.798093][ T6739] el0t_64_sync+0x1a0/0x1a4 [ 143.800476][ T6739] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.802710][ T6739] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.806909][ T4881] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 39ms [ 143.810019][ T6742] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.811206][ T6742] CPU: 1 PID: 6742 Comm: syz.1.607 Tainted: G B syzkaller #0 [ 143.812726][ T6742] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.814390][ T6742] Call trace: [ 143.814917][ T6742] dump_backtrace+0x0/0x458 [ 143.815669][ T6742] show_stack+0x2c/0x3c [ 143.816438][ T6742] __dump_stack+0x30/0x40 [ 143.817170][ T6742] dump_stack_lvl+0xf4/0x15c [ 143.817912][ T6742] dump_stack+0x1c/0x5c [ 143.818510][ T6737] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.818609][ T6742] sysfs_create_dir_ns+0x244/0x264 [ 143.820695][ T6742] kobject_add_internal+0x5ac/0xc3c [ 143.821663][ T6742] kobject_init_and_add+0x124/0x190 [ 143.822502][ T6742] gfs2_sys_fs_add+0x200/0x41c [ 143.823030][ T6744] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 143.823330][ T6742] gfs2_fill_super+0xddc/0x1a18 [ 143.825359][ T6742] get_tree_bdev+0x358/0x544 [ 143.826204][ T6742] gfs2_get_tree+0x54/0x1b4 [ 143.826950][ T6742] vfs_get_tree+0x90/0x274 [ 143.827676][ T6742] do_new_mount+0x228/0x810 [ 143.828368][ T6742] path_mount+0x5bc/0x1008 [ 143.829103][ T6742] __arm64_sys_mount+0x514/0x5f0 [ 143.829933][ T6742] invoke_syscall+0x98/0x2b0 [ 143.830703][ T6742] el0_svc_common+0x138/0x258 [ 143.831482][ T6742] do_el0_svc+0x58/0x13c [ 143.832233][ T6742] el0_svc+0x78/0x1d0 [ 143.832898][ T6742] el0t_64_sync_handler+0xcc/0xe4 [ 143.833757][ T6742] el0t_64_sync+0x1a0/0x1a4 [ 143.834540][ T6744] CPU: 0 PID: 6744 Comm: syz.0.603 Tainted: G B syzkaller #0 [ 143.835913][ T6744] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.837592][ T6744] Call trace: [ 143.838071][ T4881] gfs2: fsid=syz:syz.0: jid=0: Done [ 143.838099][ T6744] dump_backtrace+0x0/0x458 [ 143.838935][ T6740] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 143.839676][ T6744] show_stack+0x2c/0x3c [ 143.841324][ T6744] __dump_stack+0x30/0x40 [ 143.842022][ T6744] dump_stack_lvl+0xf4/0x15c [ 143.842760][ T6744] dump_stack+0x1c/0x5c [ 143.843459][ T6744] sysfs_create_dir_ns+0x244/0x264 [ 143.844309][ T6744] kobject_add_internal+0x5ac/0xc3c [ 143.845207][ T6744] kobject_init_and_add+0x124/0x190 [ 143.845989][ T6740] syz.4.604 (6740): drop_caches: 2 [ 143.846056][ T6744] gfs2_sys_fs_add+0x200/0x41c [ 143.847622][ T6744] gfs2_fill_super+0xddc/0x1a18 [ 143.848395][ T6744] get_tree_bdev+0x358/0x544 [ 143.849110][ T6744] gfs2_get_tree+0x54/0x1b4 [ 143.849868][ T6744] vfs_get_tree+0x90/0x274 [ 143.850585][ T6744] do_new_mount+0x228/0x810 [ 143.851328][ T6744] path_mount+0x5bc/0x1008 [ 143.851992][ T6744] __arm64_sys_mount+0x514/0x5f0 [ 143.852771][ T6744] invoke_syscall+0x98/0x2b0 [ 143.853445][ T6744] el0_svc_common+0x138/0x258 [ 143.854224][ T6744] do_el0_svc+0x58/0x13c [ 143.854957][ T6744] el0_svc+0x78/0x1d0 [ 143.855577][ T6744] el0t_64_sync_handler+0xcc/0xe4 [ 143.856358][ T6744] el0t_64_sync+0x1a0/0x1a4 [ 143.877495][ T6742] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.879635][ T6742] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.879668][ T6737] CPU: 0 PID: 6737 Comm: syz.3.605 Tainted: G B syzkaller #0 [ 143.882020][ T6737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 143.883710][ T6737] Call trace: [ 143.884279][ T6737] dump_backtrace+0x0/0x458 [ 143.885002][ T6737] show_stack+0x2c/0x3c [ 143.885719][ T6737] __dump_stack+0x30/0x40 [ 143.886407][ T6737] dump_stack_lvl+0xf4/0x15c [ 143.887124][ T6737] dump_stack+0x1c/0x5c [ 143.887810][ T6737] sysfs_create_dir_ns+0x244/0x264 [ 143.887879][ T6744] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.888678][ T6737] kobject_add_internal+0x5ac/0xc3c [ 143.890765][ T6744] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 143.891606][ T6737] kobject_init_and_add+0x124/0x190 [ 143.893491][ T6737] gfs2_sys_fs_add+0x200/0x41c [ 143.894288][ T6737] gfs2_fill_super+0xddc/0x1a18 [ 143.895117][ T6737] get_tree_bdev+0x358/0x544 [ 143.895878][ T6737] gfs2_get_tree+0x54/0x1b4 [ 143.896554][ T6737] vfs_get_tree+0x90/0x274 [ 143.897307][ T6737] do_new_mount+0x228/0x810 [ 143.898083][ T6737] path_mount+0x5bc/0x1008 [ 143.898800][ T6737] __arm64_sys_mount+0x514/0x5f0 [ 143.899583][ T6737] invoke_syscall+0x98/0x2b0 [ 143.900336][ T6737] el0_svc_common+0x138/0x258 [ 143.901063][ T6737] do_el0_svc+0x58/0x13c [ 143.901806][ T6737] el0_svc+0x78/0x1d0 [ 143.902451][ T6737] el0t_64_sync_handler+0xcc/0xe4 [ 143.903270][ T6737] el0t_64_sync+0x1a0/0x1a4 [ 143.909313][ T6742] syz.1.607 (6742): drop_caches: 2 [ 143.969081][ T6739] syz.2.606 (6739): drop_caches: 2 [ 143.997488][ T6737] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 143.999639][ T6737] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 144.002059][ T6737] syz.3.605 (6737): drop_caches: 2 [ 144.010310][ T6744] syz.0.603 (6744): drop_caches: 2 [ 144.239966][ T6746] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 144.241397][ T6746] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 144.243652][ T6746] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 144.245292][ T4164] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 144.246359][ T4164] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 144.267549][ T6750] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 144.268720][ T6750] CPU: 1 PID: 6750 Comm: syz.2.610 Tainted: G B syzkaller #0 [ 144.270061][ T6750] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 144.271646][ T6750] Call trace: [ 144.272185][ T6750] dump_backtrace+0x0/0x458 [ 144.272905][ T6750] show_stack+0x2c/0x3c [ 144.273560][ T6750] __dump_stack+0x30/0x40 [ 144.274266][ T6750] dump_stack_lvl+0xf4/0x15c [ 144.274475][ T4164] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 28ms [ 144.275006][ T6750] dump_stack+0x1c/0x5c [ 144.276312][ T4164] gfs2: fsid=syz:syz.0: jid=0: Done [ 144.276831][ T6750] sysfs_create_dir_ns+0x244/0x264 [ 144.278178][ T6746] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 144.278390][ T6750] kobject_add_internal+0x5ac/0xc3c [ 144.280354][ T6750] kobject_init_and_add+0x124/0x190 [ 144.281154][ T6750] gfs2_sys_fs_add+0x200/0x41c [ 144.281395][ T6746] syz.4.608 (6746): drop_caches: 2 [ 144.281873][ T6750] gfs2_fill_super+0xddc/0x1a18 [ 144.283464][ T6750] get_tree_bdev+0x358/0x544 [ 144.284160][ T6750] gfs2_get_tree+0x54/0x1b4 [ 144.284848][ T6750] vfs_get_tree+0x90/0x274 [ 144.285517][ T6750] do_new_mount+0x228/0x810 [ 144.286146][ T6750] path_mount+0x5bc/0x1008 [ 144.286802][ T6750] __arm64_sys_mount+0x514/0x5f0 [ 144.287605][ T6750] invoke_syscall+0x98/0x2b0 [ 144.288370][ T6750] el0_svc_common+0x138/0x258 [ 144.289116][ T6750] do_el0_svc+0x58/0x13c [ 144.289864][ T6750] el0_svc+0x78/0x1d0 [ 144.290475][ T6750] el0t_64_sync_handler+0xcc/0xe4 [ 144.291284][ T6750] el0t_64_sync+0x1a0/0x1a4 [ 144.308720][ T6754] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 144.310962][ T6754] gfs2: fsid=syz:syz: Now mounting FS (format 1801)... [ 144.314844][ T6754] gfs2: fsid=syz:syz.0: journal 0 mapped with 16 extents in 0ms [ 144.315294][ T6750] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 144.320051][ T6748] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 144.320150][ T4887] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 144.321217][ T6748] CPU: 0 PID: 6748 Comm: syz.1.609 Tainted: G B syzkaller #0 [ 144.322256][ T4887] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 144.323653][ T6748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 144.326412][ T6748] Call trace: [ 144.326961][ T6748] dump_backtrace+0x0/0x458 [ 144.327714][ T6748] show_stack+0x2c/0x3c [ 144.328380][ T6748] __dump_stack+0x30/0x40 [ 144.329127][ T6748] dump_stack_lvl+0xf4/0x15c [ 144.329922][ T6748] dump_stack+0x1c/0x5c [ 144.330604][ T6748] sysfs_create_dir_ns+0x244/0x264 [ 144.331435][ T6748] kobject_add_internal+0x5ac/0xc3c [ 144.332333][ T6748] kobject_init_and_add+0x124/0x190 [ 144.333225][ T6748] gfs2_sys_fs_add+0x200/0x41c [ 144.334018][ T6748] gfs2_fill_super+0xddc/0x1a18 [ 144.334825][ T6748] get_tree_bdev+0x358/0x544 [ 144.335648][ T6748] gfs2_get_tree+0x54/0x1b4 [ 144.336393][ T6748] vfs_get_tree+0x90/0x274 [ 144.337147][ T6748] do_new_mount+0x228/0x810 [ 144.337916][ T6748] path_mount+0x5bc/0x1008 [ 144.338648][ T6748] __arm64_sys_mount+0x514/0x5f0 [ 144.339505][ T6748] invoke_syscall+0x98/0x2b0 [ 144.340239][ T6748] el0_svc_common+0x138/0x258 [ 144.341004][ T6748] do_el0_svc+0x58/0x13c [ 144.341686][ T6748] el0_svc+0x78/0x1d0 [ 144.342348][ T6748] el0t_64_sync_handler+0xcc/0xe4 [ 144.343204][ T6748] el0t_64_sync+0x1a0/0x1a4 [ 144.345429][ T4887] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 23ms [ 144.345799][ T6750] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 144.346755][ T4887] gfs2: fsid=syz:syz.0: jid=0: Done [ 144.349002][ T6748] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 144.351256][ T6748] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 144.354997][ T6754] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 144.360726][ T6754] syz.0.612 (6754): drop_caches: 2 [ 144.369685][ T6750] syz.2.610 (6750): drop_caches: 2 [ 144.372037][ T6753] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 144.373223][ T6753] CPU: 0 PID: 6753 Comm: syz.3.611 Tainted: G B syzkaller #0 [ 144.374544][ T6753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 144.376130][ T6753] Call trace: [ 144.376656][ T6753] dump_backtrace+0x0/0x458 [ 144.377437][ T6753] show_stack+0x2c/0x3c [ 144.378083][ T6753] __dump_stack+0x30/0x40 [ 144.378737][ T6753] dump_stack_lvl+0xf4/0x15c [ 144.379431][ T6753] dump_stack+0x1c/0x5c [ 144.380059][ T6753] sysfs_create_dir_ns+0x244/0x264 [ 144.380813][ T6753] kobject_add_internal+0x5ac/0xc3c [ 144.381608][ T6753] kobject_init_and_add+0x124/0x190 [ 144.382442][ T6753] gfs2_sys_fs_add+0x200/0x41c [ 144.383130][ T6753] gfs2_fill_super+0xddc/0x1a18 [ 144.383888][ T6753] get_tree_bdev+0x358/0x544 [ 144.384557][ T6753] gfs2_get_tree+0x54/0x1b4 [ 144.385256][ T6753] vfs_get_tree+0x90/0x274 [ 144.385961][ T6753] do_new_mount+0x228/0x810 [ 144.386604][ T6753] path_mount+0x5bc/0x1008 [ 144.387305][ T6753] __arm64_sys_mount+0x514/0x5f0 [ 144.388143][ T6753] invoke_syscall+0x98/0x2b0 [ 144.388881][ T6753] el0_svc_common+0x138/0x258 [ 144.389652][ T6753] do_el0_svc+0x58/0x13c [ 144.390345][ T6753] el0_svc+0x78/0x1d0 [ 144.390960][ T6753] el0t_64_sync_handler+0xcc/0xe4 [ 144.391767][ T6753] el0t_64_sync+0x1a0/0x1a4 [ 144.431910][ T6753] kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. [ 144.434161][ T6753] gfs2: fsid=syz:syz: error -17 adding sysfs files [ 144.473337][ T6748] syz.1.609 (6748): drop_caches: 2