z.0: jid=0: Journal head lookup took 96ms
[  162.558756][ T7348] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  162.576951][  T796] gfs2: fsid=syz:syz.0: jid=0: Done
[  162.615155][ T7348] CPU: 0 UID: 0 PID: 7348 Comm: syz.3.102 Not tainted syzkaller #0 PREEMPT(full) 
[  162.615183][ T7348] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  162.615195][ T7348] Call Trace:
[  162.615200][ T7348]  <TASK>
[  162.615206][ T7348]  dump_stack_lvl+0x97/0xe0
[  162.615235][ T7348]  sysfs_warn_dup.cold+0x1c/0x28
[  162.615267][ T7348]  sysfs_create_dir_ns+0x129/0x140
[  162.615295][ T7348]  kobject_add_internal+0x104/0x310
[  162.615321][ T7348]  kobject_init_and_add+0xb2/0xf0
[  162.615347][ T7348]  ? alloc_workqueue_noprof+0xe0/0xb60
[  162.615375][ T7348]  gfs2_sys_fs_add+0xef/0x200
[  162.615406][ T7348]  gfs2_fill_super+0x896/0x1240
[  162.615426][ T7348]  ? sb_set_blocksize+0x8c/0x150
[  162.615449][ T7348]  ? setup_bdev_super+0x19d/0x330
[  162.615471][ T7348]  ? __pfx_gfs2_fill_super+0x10/0x10
[  162.615505][ T7348]  get_tree_bdev_flags+0x1c0/0x290
[  162.615531][ T7348]  gfs2_get_tree+0x26/0xd0
[  162.615562][ T7348]  vfs_get_tree+0x30/0x120
[  162.615582][ T7348]  path_mount+0x5a9/0x1350
[  162.615613][ T7348]  ? putname+0x78/0xe0
[  162.615644][ T7348]  __x64_sys_mount+0x1a3/0x1e0
[  162.615676][ T7348]  do_syscall_64+0xa4/0xf80
[  162.615708][ T7348]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  162.615730][ T7348] RIP: 0033:0x7f174c79c14a
[  162.615745][ T7348] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  162.615766][ T7348] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  162.615785][ T7348] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  162.615798][ T7348] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  162.615812][ T7348] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  162.615825][ T7348] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  162.615838][ T7348] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  162.615855][ T7348]  </TASK>
[  162.615863][ T7348] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  162.622813][ T7353] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  162.626865][ T7350] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  162.691001][ T7350] CPU: 0 UID: 0 PID: 7350 Comm: syz.2.101 Not tainted syzkaller #0 PREEMPT(full) 
[  162.691027][ T7350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  162.691039][ T7350] Call Trace:
[  162.691046][ T7350]  <TASK>
[  162.691052][ T7350]  dump_stack_lvl+0x97/0xe0
[  162.691081][ T7350]  sysfs_warn_dup.cold+0x1c/0x28
[  162.691115][ T7350]  sysfs_create_dir_ns+0x129/0x140
[  162.691143][ T7350]  kobject_add_internal+0x104/0x310
[  162.691171][ T7350]  kobject_init_and_add+0xb2/0xf0
[  162.691198][ T7350]  ? alloc_workqueue_noprof+0xe0/0xb60
[  162.691248][ T7350]  gfs2_sys_fs_add+0xef/0x200
[  162.691280][ T7350]  gfs2_fill_super+0x896/0x1240
[  162.691301][ T7350]  ? sb_set_blocksize+0x8c/0x150
[  162.691326][ T7350]  ? setup_bdev_super+0x19d/0x330
[  162.691349][ T7350]  ? __pfx_gfs2_fill_super+0x10/0x10
[  162.691384][ T7350]  get_tree_bdev_flags+0x1c0/0x290
[  162.691412][ T7350]  gfs2_get_tree+0x26/0xd0
[  162.691443][ T7350]  vfs_get_tree+0x30/0x120
[  162.691463][ T7350]  path_mount+0x5a9/0x1350
[  162.691496][ T7350]  ? putname+0x78/0xe0
[  162.691527][ T7350]  __x64_sys_mount+0x1a3/0x1e0
[  162.691560][ T7350]  do_syscall_64+0xa4/0xf80
[  162.691595][ T7350]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  162.691616][ T7350] RIP: 0033:0x7fdf1779c14a
[  162.691632][ T7350] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  162.691653][ T7350] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  162.691672][ T7350] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  162.691687][ T7350] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  162.691700][ T7350] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  162.691714][ T7350] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  162.691727][ T7350] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  162.691744][ T7350]  </TASK>
[  162.691757][ T7350] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  162.729883][ T7348] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  162.739011][ T7350] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  162.749354][ T7345] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  162.833996][ T7353] gfs2: fsid=syz:syz.0: found 1 quota changes
[  162.838230][ T7345] CPU: 1 UID: 0 PID: 7345 Comm: syz.5.104 Not tainted syzkaller #0 PREEMPT(full) 
[  162.838254][ T7345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  162.838298][ T7345] Call Trace:
[  162.838302][ T7345]  <TASK>
[  162.838307][ T7345]  dump_stack_lvl+0x97/0xe0
[  162.838337][ T7345]  sysfs_warn_dup.cold+0x1c/0x28
[  162.838369][ T7345]  sysfs_create_dir_ns+0x129/0x140
[  162.838397][ T7345]  kobject_add_internal+0x104/0x310
[  162.838423][ T7345]  kobject_init_and_add+0xb2/0xf0
[  162.838449][ T7345]  ? alloc_workqueue_noprof+0xe0/0xb60
[  162.838477][ T7345]  gfs2_sys_fs_add+0xef/0x200
[  162.838507][ T7345]  gfs2_fill_super+0x896/0x1240
[  162.838527][ T7345]  ? sb_set_blocksize+0x8c/0x150
[  162.838552][ T7345]  ? setup_bdev_super+0x19d/0x330
[  162.838574][ T7345]  ? __pfx_gfs2_fill_super+0x10/0x10
[  162.838608][ T7345]  get_tree_bdev_flags+0x1c0/0x290
[  162.838636][ T7345]  gfs2_get_tree+0x26/0xd0
[  162.838666][ T7345]  vfs_get_tree+0x30/0x120
[  162.838686][ T7345]  path_mount+0x5a9/0x1350
[  162.838718][ T7345]  ? putname+0x78/0xe0
[  162.838748][ T7345]  __x64_sys_mount+0x1a3/0x1e0
[  162.838780][ T7345]  do_syscall_64+0xa4/0xf80
[  162.838812][ T7345]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  162.838834][ T7345] RIP: 0033:0x7fac29d9c14a
[  162.838848][ T7345] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  162.838869][ T7345] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  162.838889][ T7345] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  162.838903][ T7345] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  162.838917][ T7345] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  162.838989][ T7345] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  162.839002][ T7345] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  162.839018][ T7345]  </TASK>
[  162.839031][ T7345] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  163.116015][ T7378] loop4: detected capacity change from 0 to 32768
[  163.137154][ T7345] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  163.427238][ T7378] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  163.437602][ T6448] syz-executor: attempt to access beyond end of device
[  163.437602][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  163.467150][ T7378] CPU: 0 UID: 0 PID: 7378 Comm: syz.4.109 Not tainted syzkaller #0 PREEMPT(full) 
[  163.467177][ T7378] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  163.467189][ T7378] Call Trace:
[  163.467195][ T7378]  <TASK>
[  163.467201][ T7378]  dump_stack_lvl+0x97/0xe0
[  163.467229][ T7378]  sysfs_warn_dup.cold+0x1c/0x28
[  163.467261][ T7378]  sysfs_create_dir_ns+0x129/0x140
[  163.467289][ T7378]  kobject_add_internal+0x104/0x310
[  163.467319][ T7378]  kobject_init_and_add+0xb2/0xf0
[  163.467346][ T7378]  ? alloc_workqueue_noprof+0xe0/0xb60
[  163.467374][ T7378]  gfs2_sys_fs_add+0xef/0x200
[  163.467404][ T7378]  gfs2_fill_super+0x896/0x1240
[  163.467424][ T7378]  ? sb_set_blocksize+0x8c/0x150
[  163.467450][ T7378]  ? setup_bdev_super+0x19d/0x330
[  163.467471][ T7378]  ? __pfx_gfs2_fill_super+0x10/0x10
[  163.467518][ T7378]  get_tree_bdev_flags+0x1c0/0x290
[  163.467546][ T7378]  gfs2_get_tree+0x26/0xd0
[  163.467577][ T7378]  vfs_get_tree+0x30/0x120
[  163.467597][ T7378]  path_mount+0x5a9/0x1350
[  163.467629][ T7378]  ? putname+0x78/0xe0
[  163.467661][ T7378]  __x64_sys_mount+0x1a3/0x1e0
[  163.467693][ T7378]  do_syscall_64+0xa4/0xf80
[  163.467726][ T7378]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  163.467748][ T7378] RIP: 0033:0x7fcdcc79c14a
[  163.467764][ T7378] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  163.467785][ T7378] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  163.467804][ T7378] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  163.467819][ T7378] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  163.467833][ T7378] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  163.467846][ T7378] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  163.467859][ T7378] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  163.467876][ T7378]  </TASK>
[  163.467897][ T7378] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  163.505516][ T7372] loop1: detected capacity change from 0 to 32768
[  163.511242][ T7378] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  163.529650][ T7373] loop6: detected capacity change from 0 to 32768
[  163.559524][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  163.657308][ T7373] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  163.762712][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  163.766481][ T7373] CPU: 1 UID: 0 PID: 7373 Comm: syz.6.107 Not tainted syzkaller #0 PREEMPT(full) 
[  163.766509][ T7373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  163.766522][ T7373] Call Trace:
[  163.766529][ T7373]  <TASK>
[  163.766536][ T7373]  dump_stack_lvl+0x97/0xe0
[  163.766564][ T7373]  sysfs_warn_dup.cold+0x1c/0x28
[  163.766597][ T7373]  sysfs_create_dir_ns+0x129/0x140
[  163.766626][ T7373]  kobject_add_internal+0x104/0x310
[  163.766653][ T7373]  kobject_init_and_add+0xb2/0xf0
[  163.766680][ T7373]  ? alloc_workqueue_noprof+0xe0/0xb60
[  163.766708][ T7373]  gfs2_sys_fs_add+0xef/0x200
[  163.766739][ T7373]  gfs2_fill_super+0x896/0x1240
[  163.766760][ T7373]  ? sb_set_blocksize+0x8c/0x150
[  163.766785][ T7373]  ? setup_bdev_super+0x19d/0x330
[  163.766809][ T7373]  ? __pfx_gfs2_fill_super+0x10/0x10
[  163.766843][ T7373]  get_tree_bdev_flags+0x1c0/0x290
[  163.766870][ T7373]  gfs2_get_tree+0x26/0xd0
[  163.766903][ T7373]  vfs_get_tree+0x30/0x120
[  163.766923][ T7373]  path_mount+0x5a9/0x1350
[  163.766955][ T7373]  ? putname+0x78/0xe0
[  163.766987][ T7373]  __x64_sys_mount+0x1a3/0x1e0
[  163.767021][ T7373]  do_syscall_64+0xa4/0xf80
[  163.767055][ T7373]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  163.767090][ T7373] RIP: 0033:0x7f533af9c14a
[  163.767107][ T7373] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  163.767128][ T7373] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  163.767148][ T7373] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  163.767163][ T7373] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  163.767177][ T7373] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  163.767192][ T7373] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  163.767205][ T7373] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  163.767227][ T7373]  </TASK>
[  163.767257][ T7373] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  163.774527][ T6448] CPU: 0 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  163.774553][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  163.774565][ T6448] Call Trace:
[  163.774570][ T6448]  <TASK>
[  163.774577][ T6448]  dump_stack_lvl+0x97/0xe0
[  163.774600][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  163.774620][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  163.774642][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  163.774678][ T6448]  gfs2_ail1_start+0x4f/0x80
[  163.774716][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  163.774738][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  163.774770][ T6448]  deactivate_locked_super+0x4f/0x120
[  163.774795][ T6448]  deactivate_super+0xa4/0xc0
[  163.774819][ T6448]  cleanup_mnt+0x145/0x1f0
[  163.774850][ T6448]  task_work_run+0x95/0xf0
[  163.774881][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  163.774908][ T6448]  do_syscall_64+0x2b8/0xf80
[  163.774942][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  163.774963][ T6448] RIP: 0033:0x7f6e1879c117
[  163.774977][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  163.774998][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  163.775017][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  163.775030][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  163.775043][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  163.775056][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  163.775069][ T6448] R13: 00007f6e1880471f R14: 000000000002788e R15: 00007ffe33ddb6e0
[  163.775085][ T6448]  </TASK>
[  163.775091][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  163.787402][ T7373] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  163.788993][ T7380] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  163.857255][ T7382] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  163.877341][ T7380] CPU: 0 UID: 0 PID: 7380 Comm: syz.2.108 Not tainted syzkaller #0 PREEMPT(full) 
[  163.877369][ T7380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  163.877382][ T7380] Call Trace:
[  163.877387][ T7380]  <TASK>
[  163.877394][ T7380]  dump_stack_lvl+0x97/0xe0
[  163.877422][ T7380]  sysfs_warn_dup.cold+0x1c/0x28
[  163.877453][ T7380]  sysfs_create_dir_ns+0x129/0x140
[  163.877481][ T7380]  kobject_add_internal+0x104/0x310
[  163.877507][ T7380]  kobject_init_and_add+0xb2/0xf0
[  163.877534][ T7380]  ? alloc_workqueue_noprof+0xe0/0xb60
[  163.877562][ T7380]  gfs2_sys_fs_add+0xef/0x200
[  163.877592][ T7380]  gfs2_fill_super+0x896/0x1240
[  163.877612][ T7380]  ? sb_set_blocksize+0x8c/0x150
[  163.877636][ T7380]  ? setup_bdev_super+0x19d/0x330
[  163.877658][ T7380]  ? __pfx_gfs2_fill_super+0x10/0x10
[  163.877692][ T7380]  get_tree_bdev_flags+0x1c0/0x290
[  163.877719][ T7380]  gfs2_get_tree+0x26/0xd0
[  163.877750][ T7380]  vfs_get_tree+0x30/0x120
[  163.877770][ T7380]  path_mount+0x5a9/0x1350
[  163.877803][ T7380]  ? putname+0x78/0xe0
[  163.877842][ T7380]  __x64_sys_mount+0x1a3/0x1e0
[  163.877874][ T7380]  do_syscall_64+0xa4/0xf80
[  163.877908][ T7380]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  163.877929][ T7380] RIP: 0033:0x7fdf1779c14a
[  163.877944][ T7380] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  163.877964][ T7380] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  163.877984][ T7380] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  163.877998][ T7380] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  163.878012][ T7380] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  163.878025][ T7380] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  163.878038][ T7380] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  163.878055][ T7380]  </TASK>
[  163.878066][ T7380] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  163.912715][ T7382] CPU: 1 UID: 0 PID: 7382 Comm: syz.3.110 Not tainted syzkaller #0 PREEMPT(full) 
[  163.912744][ T7382] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  163.912756][ T7382] Call Trace:
[  163.912762][ T7382]  <TASK>
[  163.912768][ T7382]  dump_stack_lvl+0x97/0xe0
[  163.912796][ T7382]  sysfs_warn_dup.cold+0x1c/0x28
[  163.912828][ T7382]  sysfs_create_dir_ns+0x129/0x140
[  163.912855][ T7382]  kobject_add_internal+0x104/0x310
[  163.912882][ T7382]  kobject_init_and_add+0xb2/0xf0
[  163.912909][ T7382]  ? alloc_workqueue_noprof+0xe0/0xb60
[  163.912938][ T7382]  gfs2_sys_fs_add+0xef/0x200
[  163.912969][ T7382]  gfs2_fill_super+0x896/0x1240
[  163.912989][ T7382]  ? sb_set_blocksize+0x8c/0x150
[  163.913015][ T7382]  ? setup_bdev_super+0x19d/0x330
[  163.913038][ T7382]  ? __pfx_gfs2_fill_super+0x10/0x10
[  163.913081][ T7382]  get_tree_bdev_flags+0x1c0/0x290
[  163.913108][ T7382]  gfs2_get_tree+0x26/0xd0
[  163.913141][ T7382]  vfs_get_tree+0x30/0x120
[  163.913161][ T7382]  path_mount+0x5a9/0x1350
[  163.913193][ T7382]  ? putname+0x78/0xe0
[  163.913225][ T7382]  __x64_sys_mount+0x1a3/0x1e0
[  163.913258][ T7382]  do_syscall_64+0xa4/0xf80
[  163.913293][ T7382]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  163.913316][ T7382] RIP: 0033:0x7f174c79c14a
[  163.913331][ T7382] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  163.913352][ T7382] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  163.913371][ T7382] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  163.913386][ T7382] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  163.913399][ T7382] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  163.913413][ T7382] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  163.913426][ T7382] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  163.913442][ T7382]  </TASK>
[  163.913451][ T7382] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  163.920515][ T7380] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  163.945487][ T7382] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  163.952155][ T7372] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  164.057184][ T7388] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  164.124147][ T7372] CPU: 0 UID: 0 PID: 7372 Comm: syz.1.106 Not tainted syzkaller #0 PREEMPT(full) 
[  164.124175][ T7372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  164.124188][ T7372] Call Trace:
[  164.124193][ T7372]  <TASK>
[  164.124200][ T7372]  dump_stack_lvl+0x97/0xe0
[  164.124227][ T7372]  sysfs_warn_dup.cold+0x1c/0x28
[  164.124261][ T7372]  sysfs_create_dir_ns+0x129/0x140
[  164.124288][ T7372]  kobject_add_internal+0x104/0x310
[  164.124316][ T7372]  kobject_init_and_add+0xb2/0xf0
[  164.124343][ T7372]  ? alloc_workqueue_noprof+0xe0/0xb60
[  164.124371][ T7372]  gfs2_sys_fs_add+0xef/0x200
[  164.124402][ T7372]  gfs2_fill_super+0x896/0x1240
[  164.124423][ T7372]  ? sb_set_blocksize+0x8c/0x150
[  164.124448][ T7372]  ? setup_bdev_super+0x19d/0x330
[  164.124472][ T7372]  ? __pfx_gfs2_fill_super+0x10/0x10
[  164.124507][ T7372]  get_tree_bdev_flags+0x1c0/0x290
[  164.124535][ T7372]  gfs2_get_tree+0x26/0xd0
[  164.124568][ T7372]  vfs_get_tree+0x30/0x120
[  164.124588][ T7372]  path_mount+0x5a9/0x1350
[  164.124620][ T7372]  ? putname+0x78/0xe0
[  164.124651][ T7372]  __x64_sys_mount+0x1a3/0x1e0
[  164.124684][ T7372]  do_syscall_64+0xa4/0xf80
[  164.124717][ T7372]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  164.124740][ T7372] RIP: 0033:0x7fd53b19c14a
[  164.124755][ T7372] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  164.124776][ T7372] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  164.124804][ T7372] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  164.124818][ T7372] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  164.124833][ T7372] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  164.124847][ T7372] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  164.124861][ T7372] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  164.124877][ T7372]  </TASK>
[  164.124886][ T7372] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  164.168784][ T7388] CPU: 1 UID: 0 PID: 7388 Comm: syz.4.112 Not tainted syzkaller #0 PREEMPT(full) 
[  164.168814][ T7388] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  164.168827][ T7388] Call Trace:
[  164.168832][ T7388]  <TASK>
[  164.168840][ T7388]  dump_stack_lvl+0x97/0xe0
[  164.168868][ T7388]  sysfs_warn_dup.cold+0x1c/0x28
[  164.168901][ T7388]  sysfs_create_dir_ns+0x129/0x140
[  164.168930][ T7388]  kobject_add_internal+0x104/0x310
[  164.168957][ T7388]  kobject_init_and_add+0xb2/0xf0
[  164.168985][ T7388]  ? alloc_workqueue_noprof+0xe0/0xb60
[  164.169014][ T7388]  gfs2_sys_fs_add+0xef/0x200
[  164.169052][ T7388]  gfs2_fill_super+0x896/0x1240
[  164.169073][ T7388]  ? sb_set_blocksize+0x8c/0x150
[  164.169100][ T7388]  ? setup_bdev_super+0x19d/0x330
[  164.169124][ T7388]  ? __pfx_gfs2_fill_super+0x10/0x10
[  164.169159][ T7388]  get_tree_bdev_flags+0x1c0/0x290
[  164.169188][ T7388]  gfs2_get_tree+0x26/0xd0
[  164.169221][ T7388]  vfs_get_tree+0x30/0x120
[  164.169242][ T7388]  path_mount+0x5a9/0x1350
[  164.169275][ T7388]  ? putname+0x78/0xe0
[  164.169307][ T7388]  __x64_sys_mount+0x1a3/0x1e0
[  164.169340][ T7388]  do_syscall_64+0xa4/0xf80
[  164.169375][ T7388]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  164.169398][ T7388] RIP: 0033:0x7fcdcc79c14a
[  164.169414][ T7388] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  164.169435][ T7388] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  164.169455][ T7388] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  164.169470][ T7388] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  164.169484][ T7388] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  164.169498][ T7388] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  164.169512][ T7388] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  164.169529][ T7388]  </TASK>
[  164.169539][ T7388] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  164.189450][ T7372] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  164.217195][ T7388] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  168.898284][ T5943] gfs2: fsid=syz:syz.0: file system withdrawn
[  168.996163][ T7400] set_capacity_and_notify: 3 callbacks suppressed
[  168.996175][ T7400] loop0: detected capacity change from 0 to 32768
[  169.013293][ T7400] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  169.021886][ T7400] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  169.031356][ T7400] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  169.039627][ T5943] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  169.046587][ T5943] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  169.059687][ T5943] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 13ms
[  169.067470][ T5943] gfs2: fsid=syz:syz.0: jid=0: Done
[  169.072815][ T7400] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  169.102562][ T7400] gfs2: fsid=syz:syz.0: found 1 quota changes
[  169.111425][ T6448] syz-executor: attempt to access beyond end of device
[  169.111425][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  169.126427][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  169.135592][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  169.149084][ T6448] CPU: 0 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  169.149108][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  169.149119][ T6448] Call Trace:
[  169.149125][ T6448]  <TASK>
[  169.149131][ T6448]  dump_stack_lvl+0x97/0xe0
[  169.149155][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  169.149179][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  169.149198][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  169.149238][ T6448]  gfs2_ail1_start+0x4f/0x80
[  169.149279][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  169.149302][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  169.149334][ T6448]  deactivate_locked_super+0x4f/0x120
[  169.149360][ T6448]  deactivate_super+0xa4/0xc0
[  169.149384][ T6448]  cleanup_mnt+0x145/0x1f0
[  169.149418][ T6448]  task_work_run+0x95/0xf0
[  169.149450][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  169.149479][ T6448]  do_syscall_64+0x2b8/0xf80
[  169.149523][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  169.149545][ T6448] RIP: 0033:0x7f6e1879c117
[  169.149561][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  169.149584][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  169.149605][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  169.149621][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  169.149636][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  169.149651][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  169.149666][ T6448] R13: 00007f6e1880471f R14: 000000000002947b R15: 00007ffe33ddb6e0
[  169.149683][ T6448]  </TASK>
[  169.149690][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  174.338205][ T5943] gfs2: fsid=syz:syz.0: file system withdrawn
2026/01/30 15:12:30 executed programs: 110
[  176.725577][ T7419] loop0: detected capacity change from 0 to 32768
[  176.750093][ T7414] loop6: detected capacity change from 0 to 32768
[  176.770008][ T7416] loop1: detected capacity change from 0 to 32768
[  176.786987][ T7419] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  176.795352][ T7419] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  176.808711][ T7414] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  176.816385][ T7412] loop4: detected capacity change from 0 to 32768
[  176.829534][ T7416] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  176.831438][ T7411] loop5: detected capacity change from 0 to 32768
[  176.842360][ T7418] loop2: detected capacity change from 0 to 32768
[  176.844196][ T7414] CPU: 1 UID: 0 PID: 7414 Comm: syz.6.119 Not tainted syzkaller #0 PREEMPT(full) 
[  176.844223][ T7414] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  176.844235][ T7414] Call Trace:
[  176.844241][ T7414]  <TASK>
[  176.844247][ T7414]  dump_stack_lvl+0x97/0xe0
[  176.844274][ T7414]  sysfs_warn_dup.cold+0x1c/0x28
[  176.844307][ T7414]  sysfs_create_dir_ns+0x129/0x140
[  176.844335][ T7414]  kobject_add_internal+0x104/0x310
[  176.844362][ T7414]  kobject_init_and_add+0xb2/0xf0
[  176.844390][ T7414]  ? alloc_workqueue_noprof+0xe0/0xb60
[  176.844417][ T7414]  gfs2_sys_fs_add+0xef/0x200
[  176.844448][ T7414]  gfs2_fill_super+0x896/0x1240
[  176.844468][ T7414]  ? sb_set_blocksize+0x8c/0x150
[  176.844511][ T7414]  ? setup_bdev_super+0x19d/0x330
[  176.844533][ T7414]  ? __pfx_gfs2_fill_super+0x10/0x10
[  176.844573][ T7414]  get_tree_bdev_flags+0x1c0/0x290
[  176.844601][ T7414]  gfs2_get_tree+0x26/0xd0
[  176.844633][ T7414]  vfs_get_tree+0x30/0x120
[  176.844653][ T7414]  path_mount+0x5a9/0x1350
[  176.844705][ T7414]  ? putname+0x78/0xe0
[  176.844741][ T7414]  __x64_sys_mount+0x1a3/0x1e0
[  176.844774][ T7414]  do_syscall_64+0xa4/0xf80
[  176.844814][ T7414]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  176.844836][ T7414] RIP: 0033:0x7f533af9c14a
[  176.844852][ T7414] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  176.844873][ T7414] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  176.844893][ T7414] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  176.844907][ T7414] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  176.844921][ T7414] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  176.844934][ T7414] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  176.844947][ T7414] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  176.844964][ T7414]  </TASK>
[  176.844974][ T7414] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  176.878101][ T7419] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  176.891926][ T7416] CPU: 1 UID: 0 PID: 7416 Comm: syz.1.114 Not tainted syzkaller #0 PREEMPT(full) 
[  176.891953][ T7416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  176.891966][ T7416] Call Trace:
[  176.891971][ T7416]  <TASK>
[  176.891977][ T7416]  dump_stack_lvl+0x97/0xe0
[  176.892005][ T7416]  sysfs_warn_dup.cold+0x1c/0x28
[  176.892037][ T7416]  sysfs_create_dir_ns+0x129/0x140
[  176.892065][ T7416]  kobject_add_internal+0x104/0x310
[  176.892091][ T7416]  kobject_init_and_add+0xb2/0xf0
[  176.892118][ T7416]  ? alloc_workqueue_noprof+0xe0/0xb60
[  176.892147][ T7416]  gfs2_sys_fs_add+0xef/0x200
[  176.892178][ T7416]  gfs2_fill_super+0x896/0x1240
[  176.892199][ T7416]  ? sb_set_blocksize+0x8c/0x150
[  176.892224][ T7416]  ? setup_bdev_super+0x19d/0x330
[  176.892247][ T7416]  ? __pfx_gfs2_fill_super+0x10/0x10
[  176.892282][ T7416]  get_tree_bdev_flags+0x1c0/0x290
[  176.892309][ T7416]  gfs2_get_tree+0x26/0xd0
[  176.892341][ T7416]  vfs_get_tree+0x30/0x120
[  176.892361][ T7416]  path_mount+0x5a9/0x1350
[  176.892394][ T7416]  ? putname+0x78/0xe0
[  176.892425][ T7416]  __x64_sys_mount+0x1a3/0x1e0
[  176.892458][ T7416]  do_syscall_64+0xa4/0xf80
[  176.892490][ T7416]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  176.892513][ T7416] RIP: 0033:0x7fd53b19c14a
[  176.892529][ T7416] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  176.892550][ T7416] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  176.892569][ T7416] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  176.892583][ T7416] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  176.892597][ T7416] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  176.892611][ T7416] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  176.892624][ T7416] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  176.892641][ T7416]  </TASK>
[  176.892651][ T7416] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  176.897286][ T5943] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  176.908731][ T7408] loop3: detected capacity change from 0 to 32768
[  176.911207][ T5943] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  176.948320][ T7416] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  176.957463][ T5943] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 46ms
[  176.959060][ T7412] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  176.969858][ T5943] gfs2: fsid=syz:syz.0: jid=0: Done
[  177.004801][ T7414] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  177.012053][ T7419] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  177.027260][ T7418] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  177.051285][ T7412] CPU: 1 UID: 0 PID: 7412 Comm: syz.4.117 Not tainted syzkaller #0 PREEMPT(full) 
[  177.051314][ T7412] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  177.051326][ T7412] Call Trace:
[  177.051331][ T7412]  <TASK>
[  177.051338][ T7412]  dump_stack_lvl+0x97/0xe0
[  177.051421][ T7412]  sysfs_warn_dup.cold+0x1c/0x28
[  177.051462][ T7412]  sysfs_create_dir_ns+0x129/0x140
[  177.051491][ T7412]  kobject_add_internal+0x104/0x310
[  177.051546][ T7412]  kobject_init_and_add+0xb2/0xf0
[  177.051572][ T7412]  ? alloc_workqueue_noprof+0xe0/0xb60
[  177.051600][ T7412]  gfs2_sys_fs_add+0xef/0x200
[  177.051631][ T7412]  gfs2_fill_super+0x896/0x1240
[  177.051651][ T7412]  ? sb_set_blocksize+0x8c/0x150
[  177.051675][ T7412]  ? setup_bdev_super+0x19d/0x330
[  177.051697][ T7412]  ? __pfx_gfs2_fill_super+0x10/0x10
[  177.051732][ T7412]  get_tree_bdev_flags+0x1c0/0x290
[  177.051759][ T7412]  gfs2_get_tree+0x26/0xd0
[  177.051789][ T7412]  vfs_get_tree+0x30/0x120
[  177.051809][ T7412]  path_mount+0x5a9/0x1350
[  177.051841][ T7412]  ? putname+0x78/0xe0
[  177.051871][ T7412]  __x64_sys_mount+0x1a3/0x1e0
[  177.051903][ T7412]  do_syscall_64+0xa4/0xf80
[  177.051937][ T7412]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  177.051959][ T7412] RIP: 0033:0x7fcdcc79c14a
[  177.051974][ T7412] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  177.051994][ T7412] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  177.052013][ T7412] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  177.052027][ T7412] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  177.052041][ T7412] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  177.052054][ T7412] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  177.052067][ T7412] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  177.052084][ T7412]  </TASK>
[  177.052099][ T7412] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  177.073704][ T7418] CPU: 0 UID: 0 PID: 7418 Comm: syz.2.115 Not tainted syzkaller #0 PREEMPT(full) 
[  177.073733][ T7418] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  177.073745][ T7418] Call Trace:
[  177.073751][ T7418]  <TASK>
[  177.073757][ T7418]  dump_stack_lvl+0x97/0xe0
[  177.073794][ T7418]  sysfs_warn_dup.cold+0x1c/0x28
[  177.073826][ T7418]  sysfs_create_dir_ns+0x129/0x140
[  177.073855][ T7418]  kobject_add_internal+0x104/0x310
[  177.073882][ T7418]  kobject_init_and_add+0xb2/0xf0
[  177.073909][ T7418]  ? alloc_workqueue_noprof+0xe0/0xb60
[  177.073938][ T7418]  gfs2_sys_fs_add+0xef/0x200
[  177.073969][ T7418]  gfs2_fill_super+0x896/0x1240
[  177.073989][ T7418]  ? sb_set_blocksize+0x8c/0x150
[  177.074014][ T7418]  ? setup_bdev_super+0x19d/0x330
[  177.074036][ T7418]  ? __pfx_gfs2_fill_super+0x10/0x10
[  177.074072][ T7418]  get_tree_bdev_flags+0x1c0/0x290
[  177.074099][ T7418]  gfs2_get_tree+0x26/0xd0
[  177.074131][ T7418]  vfs_get_tree+0x30/0x120
[  177.074151][ T7418]  path_mount+0x5a9/0x1350
[  177.074184][ T7418]  ? putname+0x78/0xe0
[  177.074214][ T7418]  __x64_sys_mount+0x1a3/0x1e0
[  177.074247][ T7418]  do_syscall_64+0xa4/0xf80
[  177.074281][ T7418]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  177.074303][ T7418] RIP: 0033:0x7fdf1779c14a
[  177.074318][ T7418] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  177.074339][ T7418] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  177.074358][ T7418] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  177.074372][ T7418] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  177.074385][ T7418] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  177.074398][ T7418] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  177.074411][ T7418] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  177.074427][ T7418]  </TASK>
[  177.074438][ T7418] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  177.079919][ T7412] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  177.091741][ T7418] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  177.103356][ T7408] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  177.145271][ T7411] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  177.150085][ T7408] CPU: 1 UID: 0 PID: 7408 Comm: syz.3.116 Not tainted syzkaller #0 PREEMPT(full) 
[  177.150113][ T7408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  177.150125][ T7408] Call Trace:
[  177.150131][ T7408]  <TASK>
[  177.150137][ T7408]  dump_stack_lvl+0x97/0xe0
[  177.150164][ T7408]  sysfs_warn_dup.cold+0x1c/0x28
[  177.150197][ T7408]  sysfs_create_dir_ns+0x129/0x140
[  177.150224][ T7408]  kobject_add_internal+0x104/0x310
[  177.150251][ T7408]  kobject_init_and_add+0xb2/0xf0
[  177.150277][ T7408]  ? alloc_workqueue_noprof+0xe0/0xb60
[  177.150315][ T7408]  gfs2_sys_fs_add+0xef/0x200
[  177.150347][ T7408]  gfs2_fill_super+0x896/0x1240
[  177.150367][ T7408]  ? sb_set_blocksize+0x8c/0x150
[  177.150392][ T7408]  ? setup_bdev_super+0x19d/0x330
[  177.150415][ T7408]  ? __pfx_gfs2_fill_super+0x10/0x10
[  177.150450][ T7408]  get_tree_bdev_flags+0x1c0/0x290
[  177.150478][ T7408]  gfs2_get_tree+0x26/0xd0
[  177.150509][ T7408]  vfs_get_tree+0x30/0x120
[  177.150529][ T7408]  path_mount+0x5a9/0x1350
[  177.150556][ T7408]  ? putname+0x78/0xe0
[  177.150581][ T7408]  __x64_sys_mount+0x1a3/0x1e0
[  177.150609][ T7408]  do_syscall_64+0xa4/0xf80
[  177.150644][ T7408]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  177.150666][ T7408] RIP: 0033:0x7f174c79c14a
[  177.150681][ T7408] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  177.150702][ T7408] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  177.150722][ T7408] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  177.150736][ T7408] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  177.150750][ T7408] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  177.150763][ T7408] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  177.150776][ T7408] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  177.150830][ T7408]  </TASK>
[  177.150840][ T7408] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  177.215787][ T7419] gfs2: fsid=syz:syz.0: found 1 quota changes
[  177.227252][ T7411] CPU: 1 UID: 0 PID: 7411 Comm: syz.5.118 Not tainted syzkaller #0 PREEMPT(full) 
[  177.227280][ T7411] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  177.227292][ T7411] Call Trace:
[  177.227299][ T7411]  <TASK>
[  177.227306][ T7411]  dump_stack_lvl+0x97/0xe0
[  177.227333][ T7411]  sysfs_warn_dup.cold+0x1c/0x28
[  177.227365][ T7411]  sysfs_create_dir_ns+0x129/0x140
[  177.227392][ T7411]  kobject_add_internal+0x104/0x310
[  177.227419][ T7411]  kobject_init_and_add+0xb2/0xf0
[  177.227447][ T7411]  ? alloc_workqueue_noprof+0xe0/0xb60
[  177.227474][ T7411]  gfs2_sys_fs_add+0xef/0x200
[  177.227511][ T7411]  gfs2_fill_super+0x896/0x1240
[  177.227531][ T7411]  ? sb_set_blocksize+0x8c/0x150
[  177.227556][ T7411]  ? setup_bdev_super+0x19d/0x330
[  177.227579][ T7411]  ? __pfx_gfs2_fill_super+0x10/0x10
[  177.227613][ T7411]  get_tree_bdev_flags+0x1c0/0x290
[  177.227640][ T7411]  gfs2_get_tree+0x26/0xd0
[  177.227671][ T7411]  vfs_get_tree+0x30/0x120
[  177.227691][ T7411]  path_mount+0x5a9/0x1350
[  177.227723][ T7411]  ? putname+0x78/0xe0
[  177.227753][ T7411]  __x64_sys_mount+0x1a3/0x1e0
[  177.227786][ T7411]  do_syscall_64+0xa4/0xf80
[  177.227819][ T7411]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  177.227841][ T7411] RIP: 0033:0x7fac29d9c14a
[  177.227857][ T7411] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  177.227877][ T7411] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  177.227896][ T7411] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  177.227909][ T7411] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  177.227923][ T7411] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  177.227936][ T7411] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  177.227949][ T7411] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  177.227966][ T7411]  </TASK>
[  177.227981][ T7411] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  177.229434][ T7408] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  177.257158][ T7411] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  177.558391][ T7448] loop1: detected capacity change from 0 to 32768
[  177.869068][ T7446] loop4: detected capacity change from 0 to 32768
[  177.984886][ T7442] loop2: detected capacity change from 0 to 32768
[  178.176657][ T6448] syz-executor: attempt to access beyond end of device
[  178.176657][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  178.267230][ T7448] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  178.282012][ T7448] CPU: 0 UID: 0 PID: 7448 Comm: syz.1.123 Not tainted syzkaller #0 PREEMPT(full) 
[  178.282039][ T7448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.282051][ T7448] Call Trace:
[  178.282056][ T7448]  <TASK>
[  178.282062][ T7448]  dump_stack_lvl+0x97/0xe0
[  178.282089][ T7448]  sysfs_warn_dup.cold+0x1c/0x28
[  178.282119][ T7448]  sysfs_create_dir_ns+0x129/0x140
[  178.282148][ T7448]  kobject_add_internal+0x104/0x310
[  178.282174][ T7448]  kobject_init_and_add+0xb2/0xf0
[  178.282201][ T7448]  ? alloc_workqueue_noprof+0xe0/0xb60
[  178.282228][ T7448]  gfs2_sys_fs_add+0xef/0x200
[  178.282258][ T7448]  gfs2_fill_super+0x896/0x1240
[  178.282278][ T7448]  ? sb_set_blocksize+0x8c/0x150
[  178.282302][ T7448]  ? setup_bdev_super+0x19d/0x330
[  178.282323][ T7448]  ? __pfx_gfs2_fill_super+0x10/0x10
[  178.282358][ T7448]  get_tree_bdev_flags+0x1c0/0x290
[  178.282394][ T7448]  gfs2_get_tree+0x26/0xd0
[  178.282424][ T7448]  vfs_get_tree+0x30/0x120
[  178.282444][ T7448]  path_mount+0x5a9/0x1350
[  178.282476][ T7448]  ? putname+0x78/0xe0
[  178.282506][ T7448]  __x64_sys_mount+0x1a3/0x1e0
[  178.282538][ T7448]  do_syscall_64+0xa4/0xf80
[  178.282572][ T7448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.282593][ T7448] RIP: 0033:0x7fd53b19c14a
[  178.282609][ T7448] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  178.282629][ T7448] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  178.282648][ T7448] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  178.282661][ T7448] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  178.282673][ T7448] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  178.282686][ T7448] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  178.282698][ T7448] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  178.282715][ T7448]  </TASK>
[  178.282724][ T7448] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  178.297737][ T7444] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  178.303569][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  178.307237][ T7448] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  178.310154][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  178.315462][ T7444] CPU: 1 UID: 0 PID: 7444 Comm: syz.6.121 Not tainted syzkaller #0 PREEMPT(full) 
[  178.315489][ T7444] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.315503][ T7444] Call Trace:
[  178.315508][ T7444]  <TASK>
[  178.315514][ T7444]  dump_stack_lvl+0x97/0xe0
[  178.315543][ T7444]  sysfs_warn_dup.cold+0x1c/0x28
[  178.315575][ T7444]  sysfs_create_dir_ns+0x129/0x140
[  178.315603][ T7444]  kobject_add_internal+0x104/0x310
[  178.315629][ T7444]  kobject_init_and_add+0xb2/0xf0
[  178.315656][ T7444]  ? alloc_workqueue_noprof+0xe0/0xb60
[  178.315690][ T7444]  gfs2_sys_fs_add+0xef/0x200
[  178.315721][ T7444]  gfs2_fill_super+0x896/0x1240
[  178.315741][ T7444]  ? sb_set_blocksize+0x8c/0x150
[  178.315766][ T7444]  ? setup_bdev_super+0x19d/0x330
[  178.315788][ T7444]  ? __pfx_gfs2_fill_super+0x10/0x10
[  178.315825][ T7444]  get_tree_bdev_flags+0x1c0/0x290
[  178.315851][ T7444]  gfs2_get_tree+0x26/0xd0
[  178.315883][ T7444]  vfs_get_tree+0x30/0x120
[  178.315904][ T7444]  path_mount+0x5a9/0x1350
[  178.315937][ T7444]  ? putname+0x78/0xe0
[  178.315968][ T7444]  __x64_sys_mount+0x1a3/0x1e0
[  178.316001][ T7444]  do_syscall_64+0xa4/0xf80
[  178.316035][ T7444]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.316057][ T7444] RIP: 0033:0x7f533af9c14a
[  178.316073][ T7444] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  178.316094][ T7444] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  178.316113][ T7444] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  178.316127][ T7444] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  178.316141][ T7444] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  178.316153][ T7444] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  178.316167][ T7444] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  178.316183][ T7444]  </TASK>
[  178.316192][ T7444] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  178.318543][ T6448] CPU: 0 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  178.318569][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.318581][ T6448] Call Trace:
[  178.318586][ T6448]  <TASK>
[  178.318593][ T6448]  dump_stack_lvl+0x97/0xe0
[  178.318618][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  178.318639][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  178.318660][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  178.318696][ T6448]  gfs2_ail1_start+0x4f/0x80
[  178.318734][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  178.318756][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  178.318788][ T6448]  deactivate_locked_super+0x4f/0x120
[  178.318813][ T6448]  deactivate_super+0xa4/0xc0
[  178.318837][ T6448]  cleanup_mnt+0x145/0x1f0
[  178.318862][ T6448]  task_work_run+0x95/0xf0
[  178.318892][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  178.318920][ T6448]  do_syscall_64+0x2b8/0xf80
[  178.318953][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.318975][ T6448] RIP: 0033:0x7f6e1879c117
[  178.318989][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  178.319009][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  178.319028][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  178.319041][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  178.319054][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  178.319067][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  178.319080][ T6448] R13: 00007f6e1880471f R14: 000000000002b4be R15: 00007ffe33ddb6e0
[  178.319096][ T6448]  </TASK>
[  178.319102][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  178.323760][ T7444] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  178.351702][ T7450] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  178.377635][ T7446] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  178.380453][ T7450] CPU: 0 UID: 0 PID: 7450 Comm: syz.3.125 Not tainted syzkaller #0 PREEMPT(full) 
[  178.380480][ T7450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.380492][ T7450] Call Trace:
[  178.380498][ T7450]  <TASK>
[  178.380504][ T7450]  dump_stack_lvl+0x97/0xe0
[  178.380532][ T7450]  sysfs_warn_dup.cold+0x1c/0x28
[  178.380564][ T7450]  sysfs_create_dir_ns+0x129/0x140
[  178.380593][ T7450]  kobject_add_internal+0x104/0x310
[  178.380626][ T7450]  kobject_init_and_add+0xb2/0xf0
[  178.380653][ T7450]  ? alloc_workqueue_noprof+0xe0/0xb60
[  178.380682][ T7450]  gfs2_sys_fs_add+0xef/0x200
[  178.380712][ T7450]  gfs2_fill_super+0x896/0x1240
[  178.380733][ T7450]  ? sb_set_blocksize+0x8c/0x150
[  178.380758][ T7450]  ? setup_bdev_super+0x19d/0x330
[  178.380780][ T7450]  ? __pfx_gfs2_fill_super+0x10/0x10
[  178.380815][ T7450]  get_tree_bdev_flags+0x1c0/0x290
[  178.380842][ T7450]  gfs2_get_tree+0x26/0xd0
[  178.380875][ T7450]  vfs_get_tree+0x30/0x120
[  178.380895][ T7450]  path_mount+0x5a9/0x1350
[  178.380928][ T7450]  ? putname+0x78/0xe0
[  178.380959][ T7450]  __x64_sys_mount+0x1a3/0x1e0
[  178.380991][ T7450]  do_syscall_64+0xa4/0xf80
[  178.381026][ T7450]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.381049][ T7450] RIP: 0033:0x7f174c79c14a
[  178.381065][ T7450] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  178.381085][ T7450] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  178.381104][ T7450] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  178.381118][ T7450] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  178.381132][ T7450] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  178.381145][ T7450] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  178.381158][ T7450] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  178.381174][ T7450]  </TASK>
[  178.381186][ T7450] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  178.384063][ T7442] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  178.388864][ T7450] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  178.392955][ T7442] CPU: 1 UID: 0 PID: 7442 Comm: syz.2.120 Not tainted syzkaller #0 PREEMPT(full) 
[  178.392982][ T7442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.392995][ T7442] Call Trace:
[  178.393001][ T7442]  <TASK>
[  178.393007][ T7442]  dump_stack_lvl+0x97/0xe0
[  178.393036][ T7442]  sysfs_warn_dup.cold+0x1c/0x28
[  178.393068][ T7442]  sysfs_create_dir_ns+0x129/0x140
[  178.393096][ T7442]  kobject_add_internal+0x104/0x310
[  178.393122][ T7442]  kobject_init_and_add+0xb2/0xf0
[  178.393149][ T7442]  ? alloc_workqueue_noprof+0xe0/0xb60
[  178.393177][ T7442]  gfs2_sys_fs_add+0xef/0x200
[  178.393207][ T7442]  gfs2_fill_super+0x896/0x1240
[  178.393227][ T7442]  ? sb_set_blocksize+0x8c/0x150
[  178.393251][ T7442]  ? setup_bdev_super+0x19d/0x330
[  178.393273][ T7442]  ? __pfx_gfs2_fill_super+0x10/0x10
[  178.393308][ T7442]  get_tree_bdev_flags+0x1c0/0x290
[  178.393335][ T7442]  gfs2_get_tree+0x26/0xd0
[  178.393366][ T7442]  vfs_get_tree+0x30/0x120
[  178.393392][ T7442]  path_mount+0x5a9/0x1350
[  178.393424][ T7442]  ? putname+0x78/0xe0
[  178.393454][ T7442]  __x64_sys_mount+0x1a3/0x1e0
[  178.393487][ T7442]  do_syscall_64+0xa4/0xf80
[  178.393521][ T7442]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.393542][ T7442] RIP: 0033:0x7fdf1779c14a
[  178.393558][ T7442] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  178.393579][ T7442] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  178.393598][ T7442] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  178.393612][ T7442] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  178.393626][ T7442] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  178.393638][ T7442] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  178.393651][ T7442] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  178.393668][ T7442]  </TASK>
[  178.393678][ T7442] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  178.397419][ T7446] CPU: 0 UID: 0 PID: 7446 Comm: syz.4.122 Not tainted syzkaller #0 PREEMPT(full) 
[  178.397445][ T7446] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  178.397457][ T7446] Call Trace:
[  178.397462][ T7446]  <TASK>
[  178.397468][ T7446]  dump_stack_lvl+0x97/0xe0
[  178.397492][ T7446]  sysfs_warn_dup.cold+0x1c/0x28
[  178.397524][ T7446]  sysfs_create_dir_ns+0x129/0x140
[  178.397551][ T7446]  kobject_add_internal+0x104/0x310
[  178.397577][ T7446]  kobject_init_and_add+0xb2/0xf0
[  178.397618][ T7446]  ? alloc_workqueue_noprof+0xe0/0xb60
[  178.397651][ T7446]  gfs2_sys_fs_add+0xef/0x200
[  178.397681][ T7446]  gfs2_fill_super+0x896/0x1240
[  178.397701][ T7446]  ? sb_set_blocksize+0x8c/0x150
[  178.397725][ T7446]  ? setup_bdev_super+0x19d/0x330
[  178.397748][ T7446]  ? __pfx_gfs2_fill_super+0x10/0x10
[  178.397782][ T7446]  get_tree_bdev_flags+0x1c0/0x290
[  178.397809][ T7446]  gfs2_get_tree+0x26/0xd0
[  178.397841][ T7446]  vfs_get_tree+0x30/0x120
[  178.397861][ T7446]  path_mount+0x5a9/0x1350
[  178.397892][ T7446]  ? putname+0x78/0xe0
[  178.397923][ T7446]  __x64_sys_mount+0x1a3/0x1e0
[  178.397955][ T7446]  do_syscall_64+0xa4/0xf80
[  178.397989][ T7446]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  178.398011][ T7446] RIP: 0033:0x7fcdcc79c14a
[  178.398026][ T7446] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  178.398046][ T7446] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  178.398065][ T7446] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  178.398079][ T7446] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  178.398093][ T7446] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  178.398106][ T7446] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  178.398119][ T7446] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  178.398136][ T7446]  </TASK>
[  178.398145][ T7446] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  178.403301][ T7442] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  178.408153][ T7446] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  178.447243][ T7452] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  179.605918][ T7452] CPU: 0 UID: 0 PID: 7452 Comm: syz.5.126 Not tainted syzkaller #0 PREEMPT(full) 
[  179.605945][ T7452] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  179.605957][ T7452] Call Trace:
[  179.605962][ T7452]  <TASK>
[  179.605969][ T7452]  dump_stack_lvl+0x97/0xe0
[  179.605997][ T7452]  sysfs_warn_dup.cold+0x1c/0x28
[  179.606032][ T7452]  sysfs_create_dir_ns+0x129/0x140
[  179.606061][ T7452]  kobject_add_internal+0x104/0x310
[  179.606088][ T7452]  kobject_init_and_add+0xb2/0xf0
[  179.606114][ T7452]  ? alloc_workqueue_noprof+0xe0/0xb60
[  179.606139][ T7452]  gfs2_sys_fs_add+0xef/0x200
[  179.606172][ T7452]  gfs2_fill_super+0x896/0x1240
[  179.606198][ T7452]  ? sb_set_blocksize+0x8c/0x150
[  179.606226][ T7452]  ? setup_bdev_super+0x19d/0x330
[  179.606247][ T7452]  ? __pfx_gfs2_fill_super+0x10/0x10
[  179.606298][ T7452]  get_tree_bdev_flags+0x1c0/0x290
[  179.606332][ T7452]  gfs2_get_tree+0x26/0xd0
[  179.606364][ T7452]  vfs_get_tree+0x30/0x120
[  179.606382][ T7452]  path_mount+0x5a9/0x1350
[  179.606412][ T7452]  ? putname+0x78/0xe0
[  179.606447][ T7452]  __x64_sys_mount+0x1a3/0x1e0
[  179.606483][ T7452]  do_syscall_64+0xa4/0xf80
[  179.606542][ T7452]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  179.606565][ T7452] RIP: 0033:0x7fac29d9c14a
[  179.606582][ T7452] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  179.606603][ T7452] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  179.606623][ T7452] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  179.606638][ T7452] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  179.606653][ T7452] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  179.606667][ T7452] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  179.606680][ T7452] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  179.606696][ T7452]  </TASK>
[  179.606826][ T7452] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  179.817405][ T7452] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  183.378284][ T5943] gfs2: fsid=syz:syz.0: file system withdrawn
[  183.470376][ T7468] set_capacity_and_notify: 3 callbacks suppressed
[  183.470388][ T7468] loop0: detected capacity change from 0 to 32768
[  183.488663][ T7468] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  183.498499][ T7468] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  183.507359][ T7468] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  183.515478][ T6734] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  183.522555][ T6734] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  183.533739][ T6734] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 11ms
[  183.541375][ T6734] gfs2: fsid=syz:syz.0: jid=0: Done
[  183.546596][ T7468] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  183.572591][ T7468] gfs2: fsid=syz:syz.0: found 1 quota changes
[  183.581940][ T6448] syz-executor: attempt to access beyond end of device
[  183.581940][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  183.597442][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  183.606593][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  183.620245][ T6448] CPU: 1 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  183.620271][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  183.620285][ T6448] Call Trace:
[  183.620291][ T6448]  <TASK>
[  183.620297][ T6448]  dump_stack_lvl+0x97/0xe0
[  183.620329][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  183.620351][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  183.620372][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  183.620412][ T6448]  gfs2_ail1_start+0x4f/0x80
[  183.620451][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  183.620473][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  183.620507][ T6448]  deactivate_locked_super+0x4f/0x120
[  183.620531][ T6448]  deactivate_super+0xa4/0xc0
[  183.620550][ T6448]  cleanup_mnt+0x145/0x1f0
[  183.620577][ T6448]  task_work_run+0x95/0xf0
[  183.620609][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  183.620637][ T6448]  do_syscall_64+0x2b8/0xf80
[  183.620675][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  183.620710][ T6448] RIP: 0033:0x7f6e1879c117
[  183.620729][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  183.620750][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  183.620769][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  183.620782][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  183.620795][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  183.620808][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  183.620821][ T6448] R13: 00007f6e1880471f R14: 000000000002cc53 R15: 00007ffe33ddb6e0
[  183.620838][ T6448]  </TASK>
[  183.620844][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  188.818330][ T6734] gfs2: fsid=syz:syz.0: file system withdrawn
2026/01/30 15:12:45 executed programs: 124
[  191.305185][ T7485] loop4: detected capacity change from 0 to 32768
[  191.335878][ T7488] loop5: detected capacity change from 0 to 32768
[  191.339167][ T7485] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  191.354699][ T7484] loop3: detected capacity change from 0 to 32768
[  191.364350][ T7486] loop0: detected capacity change from 0 to 32768
[  191.383401][ T7485] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  191.398325][ T7485] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  191.406439][ T7488] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.418619][ T7482] loop2: detected capacity change from 0 to 32768
[  191.425517][ T7484] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.433318][ T7484] CPU: 0 UID: 0 PID: 7484 Comm: syz.3.130 Not tainted syzkaller #0 PREEMPT(full) 
[  191.433342][ T7484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.433352][ T7484] Call Trace:
[  191.433357][ T7484]  <TASK>
[  191.433363][ T7484]  dump_stack_lvl+0x97/0xe0
[  191.433389][ T7484]  sysfs_warn_dup.cold+0x1c/0x28
[  191.433417][ T7484]  sysfs_create_dir_ns+0x129/0x140
[  191.433441][ T7484]  kobject_add_internal+0x104/0x310
[  191.433464][ T7484]  kobject_init_and_add+0xb2/0xf0
[  191.433489][ T7484]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.433516][ T7484]  gfs2_sys_fs_add+0xef/0x200
[  191.433543][ T7484]  gfs2_fill_super+0x896/0x1240
[  191.433560][ T7484]  ? sb_set_blocksize+0x8c/0x150
[  191.433584][ T7484]  ? setup_bdev_super+0x19d/0x330
[  191.433604][ T7484]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.433640][ T7484]  get_tree_bdev_flags+0x1c0/0x290
[  191.433667][ T7484]  gfs2_get_tree+0x26/0xd0
[  191.433699][ T7484]  vfs_get_tree+0x30/0x120
[  191.433719][ T7484]  path_mount+0x5a9/0x1350
[  191.433752][ T7484]  ? putname+0x78/0xe0
[  191.433784][ T7484]  __x64_sys_mount+0x1a3/0x1e0
[  191.433816][ T7484]  do_syscall_64+0xa4/0xf80
[  191.433851][ T7484]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.433873][ T7484] RIP: 0033:0x7f174c79c14a
[  191.433889][ T7484] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.433911][ T7484] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.433931][ T7484] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  191.433945][ T7484] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  191.433958][ T7484] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  191.433972][ T7484] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.433985][ T7484] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  191.434001][ T7484]  </TASK>
[  191.434019][ T7484] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.443569][ T7488] CPU: 1 UID: 0 PID: 7488 Comm: syz.5.132 Not tainted syzkaller #0 PREEMPT(full) 
[  191.443595][ T7488] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.443608][ T7488] Call Trace:
[  191.443613][ T7488]  <TASK>
[  191.443620][ T7488]  dump_stack_lvl+0x97/0xe0
[  191.443647][ T7488]  sysfs_warn_dup.cold+0x1c/0x28
[  191.443679][ T7488]  sysfs_create_dir_ns+0x129/0x140
[  191.443708][ T7488]  kobject_add_internal+0x104/0x310
[  191.443735][ T7488]  kobject_init_and_add+0xb2/0xf0
[  191.443761][ T7488]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.443790][ T7488]  gfs2_sys_fs_add+0xef/0x200
[  191.443830][ T7488]  gfs2_fill_super+0x896/0x1240
[  191.443849][ T7488]  ? sb_set_blocksize+0x8c/0x150
[  191.443874][ T7488]  ? setup_bdev_super+0x19d/0x330
[  191.443897][ T7488]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.443933][ T7488]  get_tree_bdev_flags+0x1c0/0x290
[  191.443960][ T7488]  gfs2_get_tree+0x26/0xd0
[  191.443992][ T7488]  vfs_get_tree+0x30/0x120
[  191.444012][ T7488]  path_mount+0x5a9/0x1350
[  191.444049][ T7488]  ? putname+0x78/0xe0
[  191.444080][ T7488]  __x64_sys_mount+0x1a3/0x1e0
[  191.444113][ T7488]  do_syscall_64+0xa4/0xf80
[  191.444146][ T7488]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.444168][ T7488] RIP: 0033:0x7fac29d9c14a
[  191.444184][ T7488] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.444205][ T7488] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.444224][ T7488] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  191.444238][ T7488] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  191.444252][ T7488] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  191.444272][ T7488] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.444285][ T7488] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  191.444302][ T7488]  </TASK>
[  191.444311][ T7488] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.471204][ T7484] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  191.489323][ T7487] loop6: detected capacity change from 0 to 32768
[  191.517571][ T2212] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  191.567302][ T7488] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  191.578832][ T2212] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  191.594110][ T7486] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.603990][ T2212] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 25ms
[  191.621587][ T7477] loop1: detected capacity change from 0 to 32768
[  191.637286][ T7486] CPU: 0 UID: 0 PID: 7486 Comm: syz.0.127 Not tainted syzkaller #0 PREEMPT(full) 
[  191.637315][ T7486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.637328][ T7486] Call Trace:
[  191.637333][ T7486]  <TASK>
[  191.637339][ T7486]  dump_stack_lvl+0x97/0xe0
[  191.637367][ T7486]  sysfs_warn_dup.cold+0x1c/0x28
[  191.637400][ T7486]  sysfs_create_dir_ns+0x129/0x140
[  191.637428][ T7486]  kobject_add_internal+0x104/0x310
[  191.637454][ T7486]  kobject_init_and_add+0xb2/0xf0
[  191.637481][ T7486]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.637510][ T7486]  gfs2_sys_fs_add+0xef/0x200
[  191.637541][ T7486]  gfs2_fill_super+0x896/0x1240
[  191.637561][ T7486]  ? sb_set_blocksize+0x8c/0x150
[  191.637586][ T7486]  ? setup_bdev_super+0x19d/0x330
[  191.637608][ T7486]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.637644][ T7486]  get_tree_bdev_flags+0x1c0/0x290
[  191.637671][ T7486]  gfs2_get_tree+0x26/0xd0
[  191.637703][ T7486]  vfs_get_tree+0x30/0x120
[  191.637723][ T7486]  path_mount+0x5a9/0x1350
[  191.637757][ T7486]  ? putname+0x78/0xe0
[  191.637787][ T7486]  __x64_sys_mount+0x1a3/0x1e0
[  191.637820][ T7486]  do_syscall_64+0xa4/0xf80
[  191.637854][ T7486]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.637876][ T7486] RIP: 0033:0x7f6e1879c14a
[  191.637891][ T7486] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.637912][ T7486] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.637932][ T7486] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  191.637946][ T7486] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  191.637959][ T7486] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  191.637972][ T7486] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.637985][ T7486] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  191.638001][ T7486]  </TASK>
[  191.638012][ T7486] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.683235][ T7482] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.705543][ T7486] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  191.708616][ T7482] CPU: 1 UID: 0 PID: 7482 Comm: syz.2.129 Not tainted syzkaller #0 PREEMPT(full) 
[  191.708643][ T7482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.708656][ T7482] Call Trace:
[  191.708661][ T7482]  <TASK>
[  191.708667][ T7482]  dump_stack_lvl+0x97/0xe0
[  191.708695][ T7482]  sysfs_warn_dup.cold+0x1c/0x28
[  191.708726][ T7482]  sysfs_create_dir_ns+0x129/0x140
[  191.708754][ T7482]  kobject_add_internal+0x104/0x310
[  191.708781][ T7482]  kobject_init_and_add+0xb2/0xf0
[  191.708808][ T7482]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.708835][ T7482]  gfs2_sys_fs_add+0xef/0x200
[  191.708866][ T7482]  gfs2_fill_super+0x896/0x1240
[  191.708886][ T7482]  ? sb_set_blocksize+0x8c/0x150
[  191.708911][ T7482]  ? setup_bdev_super+0x19d/0x330
[  191.708935][ T7482]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.708970][ T7482]  get_tree_bdev_flags+0x1c0/0x290
[  191.708997][ T7482]  gfs2_get_tree+0x26/0xd0
[  191.709028][ T7482]  vfs_get_tree+0x30/0x120
[  191.709058][ T7482]  path_mount+0x5a9/0x1350
[  191.709091][ T7482]  ? putname+0x78/0xe0
[  191.709118][ T7482]  __x64_sys_mount+0x1a3/0x1e0
[  191.709150][ T7482]  do_syscall_64+0xa4/0xf80
[  191.709184][ T7482]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.709207][ T7482] RIP: 0033:0x7fdf1779c14a
[  191.709223][ T7482] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.709244][ T7482] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.709264][ T7482] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  191.709279][ T7482] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  191.709292][ T7482] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  191.709304][ T7482] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.709316][ T7482] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  191.709334][ T7482]  </TASK>
[  191.709345][ T7482] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.734717][ T2212] gfs2: fsid=syz:syz.0: jid=0: Done
[  191.738414][ T7482] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  191.743540][ T7487] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.785248][ T7477] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  191.792305][ T7485] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  191.856652][ T7477] CPU: 1 UID: 0 PID: 7477 Comm: syz.1.128 Not tainted syzkaller #0 PREEMPT(full) 
[  191.856683][ T7477] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.856695][ T7477] Call Trace:
[  191.856701][ T7477]  <TASK>
[  191.856706][ T7477]  dump_stack_lvl+0x97/0xe0
[  191.856739][ T7477]  sysfs_warn_dup.cold+0x1c/0x28
[  191.856770][ T7477]  sysfs_create_dir_ns+0x129/0x140
[  191.856797][ T7477]  kobject_add_internal+0x104/0x310
[  191.856840][ T7477]  kobject_init_and_add+0xb2/0xf0
[  191.856866][ T7477]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.856894][ T7477]  gfs2_sys_fs_add+0xef/0x200
[  191.856924][ T7477]  gfs2_fill_super+0x896/0x1240
[  191.856950][ T7477]  ? sb_set_blocksize+0x8c/0x150
[  191.856974][ T7477]  ? setup_bdev_super+0x19d/0x330
[  191.856996][ T7477]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.857031][ T7477]  get_tree_bdev_flags+0x1c0/0x290
[  191.857058][ T7477]  gfs2_get_tree+0x26/0xd0
[  191.857093][ T7477]  vfs_get_tree+0x30/0x120
[  191.857112][ T7477]  path_mount+0x5a9/0x1350
[  191.857144][ T7477]  ? putname+0x78/0xe0
[  191.857174][ T7477]  __x64_sys_mount+0x1a3/0x1e0
[  191.857205][ T7477]  do_syscall_64+0xa4/0xf80
[  191.857244][ T7477]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.857266][ T7477] RIP: 0033:0x7fd53b19c14a
[  191.857281][ T7477] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.857301][ T7477] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.857320][ T7477] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  191.857334][ T7477] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  191.857348][ T7477] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  191.857361][ T7477] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.857373][ T7477] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  191.857390][ T7477]  </TASK>
[  191.857421][ T7477] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.864592][ T7487] CPU: 0 UID: 0 PID: 7487 Comm: syz.6.133 Not tainted syzkaller #0 PREEMPT(full) 
[  191.864621][ T7487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  191.864633][ T7487] Call Trace:
[  191.864639][ T7487]  <TASK>
[  191.864645][ T7487]  dump_stack_lvl+0x97/0xe0
[  191.864673][ T7487]  sysfs_warn_dup.cold+0x1c/0x28
[  191.864706][ T7487]  sysfs_create_dir_ns+0x129/0x140
[  191.864734][ T7487]  kobject_add_internal+0x104/0x310
[  191.864761][ T7487]  kobject_init_and_add+0xb2/0xf0
[  191.864788][ T7487]  ? alloc_workqueue_noprof+0xe0/0xb60
[  191.864816][ T7487]  gfs2_sys_fs_add+0xef/0x200
[  191.864846][ T7487]  gfs2_fill_super+0x896/0x1240
[  191.864867][ T7487]  ? sb_set_blocksize+0x8c/0x150
[  191.864892][ T7487]  ? setup_bdev_super+0x19d/0x330
[  191.864914][ T7487]  ? __pfx_gfs2_fill_super+0x10/0x10
[  191.864949][ T7487]  get_tree_bdev_flags+0x1c0/0x290
[  191.864977][ T7487]  gfs2_get_tree+0x26/0xd0
[  191.865010][ T7487]  vfs_get_tree+0x30/0x120
[  191.865029][ T7487]  path_mount+0x5a9/0x1350
[  191.865062][ T7487]  ? putname+0x78/0xe0
[  191.865094][ T7487]  __x64_sys_mount+0x1a3/0x1e0
[  191.865126][ T7487]  do_syscall_64+0xa4/0xf80
[  191.865160][ T7487]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  191.865190][ T7487] RIP: 0033:0x7f533af9c14a
[  191.865206][ T7487] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  191.865228][ T7487] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  191.865255][ T7487] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  191.865269][ T7487] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  191.865283][ T7487] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  191.865296][ T7487] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  191.865310][ T7487] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  191.865326][ T7487]  </TASK>
[  191.865336][ T7487] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  191.930716][ T7487] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  191.938072][ T7477] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  192.280579][ T7506] loop3: detected capacity change from 0 to 32768
[  192.439095][ T7514] loop6: detected capacity change from 0 to 32768
[  192.572380][ T7511] loop0: detected capacity change from 0 to 32768
[  192.826696][ T7514] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  192.846489][ T7485] gfs2: fsid=syz:syz.0: found 1 quota changes
[  192.858607][ T7514] CPU: 0 UID: 0 PID: 7514 Comm: syz.6.138 Not tainted syzkaller #0 PREEMPT(full) 
[  192.858633][ T7514] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  192.858644][ T7514] Call Trace:
[  192.858650][ T7514]  <TASK>
[  192.858656][ T7514]  dump_stack_lvl+0x97/0xe0
[  192.858685][ T7514]  sysfs_warn_dup.cold+0x1c/0x28
[  192.858717][ T7514]  sysfs_create_dir_ns+0x129/0x140
[  192.858744][ T7514]  kobject_add_internal+0x104/0x310
[  192.858772][ T7514]  kobject_init_and_add+0xb2/0xf0
[  192.858799][ T7514]  ? alloc_workqueue_noprof+0xe0/0xb60
[  192.858827][ T7514]  gfs2_sys_fs_add+0xef/0x200
[  192.858858][ T7514]  gfs2_fill_super+0x896/0x1240
[  192.858887][ T7514]  ? sb_set_blocksize+0x8c/0x150
[  192.858913][ T7514]  ? setup_bdev_super+0x19d/0x330
[  192.858936][ T7514]  ? __pfx_gfs2_fill_super+0x10/0x10
[  192.858973][ T7514]  get_tree_bdev_flags+0x1c0/0x290
[  192.858999][ T7514]  gfs2_get_tree+0x26/0xd0
[  192.859028][ T7514]  vfs_get_tree+0x30/0x120
[  192.859046][ T7514]  path_mount+0x5a9/0x1350
[  192.859076][ T7514]  ? putname+0x78/0xe0
[  192.859107][ T7514]  __x64_sys_mount+0x1a3/0x1e0
[  192.859137][ T7514]  do_syscall_64+0xa4/0xf80
[  192.859171][ T7514]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  192.859193][ T7514] RIP: 0033:0x7f533af9c14a
[  192.859208][ T7514] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  192.859228][ T7514] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  192.859248][ T7514] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  192.859262][ T7514] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  192.859275][ T7514] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  192.859288][ T7514] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  192.859301][ T7514] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  192.859317][ T7514]  </TASK>
[  192.859326][ T7514] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  192.907496][ T7515] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  192.930349][ T7514] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  192.936478][ T7515] CPU: 1 UID: 0 PID: 7515 Comm: syz.5.136 Not tainted syzkaller #0 PREEMPT(full) 
[  192.936504][ T7515] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  192.936517][ T7515] Call Trace:
[  192.936523][ T7515]  <TASK>
[  192.936529][ T7515]  dump_stack_lvl+0x97/0xe0
[  192.936556][ T7515]  sysfs_warn_dup.cold+0x1c/0x28
[  192.936588][ T7515]  sysfs_create_dir_ns+0x129/0x140
[  192.936616][ T7515]  kobject_add_internal+0x104/0x310
[  192.936643][ T7515]  kobject_init_and_add+0xb2/0xf0
[  192.936670][ T7515]  ? alloc_workqueue_noprof+0xe0/0xb60
[  192.936713][ T7515]  gfs2_sys_fs_add+0xef/0x200
[  192.936745][ T7515]  gfs2_fill_super+0x896/0x1240
[  192.936765][ T7515]  ? sb_set_blocksize+0x8c/0x150
[  192.936790][ T7515]  ? setup_bdev_super+0x19d/0x330
[  192.936813][ T7515]  ? __pfx_gfs2_fill_super+0x10/0x10
[  192.936848][ T7515]  get_tree_bdev_flags+0x1c0/0x290
[  192.936875][ T7515]  gfs2_get_tree+0x26/0xd0
[  192.936907][ T7515]  vfs_get_tree+0x30/0x120
[  192.936927][ T7515]  path_mount+0x5a9/0x1350
[  192.936959][ T7515]  ? putname+0x78/0xe0
[  192.936990][ T7515]  __x64_sys_mount+0x1a3/0x1e0
[  192.937022][ T7515]  do_syscall_64+0xa4/0xf80
[  192.937056][ T7515]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  192.937084][ T7515] RIP: 0033:0x7fac29d9c14a
[  192.937099][ T7515] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  192.937120][ T7515] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  192.937139][ T7515] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  192.937153][ T7515] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  192.937173][ T7515] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  192.937187][ T7515] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  192.937200][ T7515] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  192.937221][ T7515]  </TASK>
[  192.937258][ T7515] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  192.953002][ T7512] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  192.960512][ T7515] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  192.964649][ T7512] CPU: 0 UID: 0 PID: 7512 Comm: syz.2.135 Not tainted syzkaller #0 PREEMPT(full) 
[  192.964677][ T7512] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  192.964690][ T7512] Call Trace:
[  192.964695][ T7512]  <TASK>
[  192.964702][ T7512]  dump_stack_lvl+0x97/0xe0
[  192.964731][ T7512]  sysfs_warn_dup.cold+0x1c/0x28
[  192.964765][ T7512]  sysfs_create_dir_ns+0x129/0x140
[  192.964793][ T7512]  kobject_add_internal+0x104/0x310
[  192.964821][ T7512]  kobject_init_and_add+0xb2/0xf0
[  192.964849][ T7512]  ? alloc_workqueue_noprof+0xe0/0xb60
[  192.964877][ T7512]  gfs2_sys_fs_add+0xef/0x200
[  192.964909][ T7512]  gfs2_fill_super+0x896/0x1240
[  192.964929][ T7512]  ? sb_set_blocksize+0x8c/0x150
[  192.964956][ T7512]  ? setup_bdev_super+0x19d/0x330
[  192.964979][ T7512]  ? __pfx_gfs2_fill_super+0x10/0x10
[  192.965015][ T7512]  get_tree_bdev_flags+0x1c0/0x290
[  192.965053][ T7512]  gfs2_get_tree+0x26/0xd0
[  192.965099][ T7512]  vfs_get_tree+0x30/0x120
[  192.965132][ T7512]  path_mount+0x5a9/0x1350
[  192.965165][ T7512]  ? putname+0x78/0xe0
[  192.965201][ T7512]  __x64_sys_mount+0x1a3/0x1e0
[  192.965253][ T7512]  do_syscall_64+0xa4/0xf80
[  192.965294][ T7512]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  192.965322][ T7512] RIP: 0033:0x7fdf1779c14a
[  192.965338][ T7512] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  192.965358][ T7512] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  192.965377][ T7512] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  192.965392][ T7512] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  192.965405][ T7512] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  192.965419][ T7512] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  192.965432][ T7512] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  192.965449][ T7512]  </TASK>
[  192.965459][ T7512] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  192.970245][ T6470] syz-executor: attempt to access beyond end of device
[  192.970245][ T6470] loop4: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  192.975408][ T7512] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  192.981265][ T6470] Buffer I/O error on dev loop4, logical block 8589934885, lost async page write
[  192.984247][ T7506] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  193.004061][ T6470] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  193.014166][ T7506] CPU: 0 UID: 0 PID: 7506 Comm: syz.3.134 Not tainted syzkaller #0 PREEMPT(full) 
[  193.014193][ T7506] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  193.014205][ T7506] Call Trace:
[  193.014210][ T7506]  <TASK>
[  193.014216][ T7506]  dump_stack_lvl+0x97/0xe0
[  193.014243][ T7506]  sysfs_warn_dup.cold+0x1c/0x28
[  193.014277][ T7506]  sysfs_create_dir_ns+0x129/0x140
[  193.014304][ T7506]  kobject_add_internal+0x104/0x310
[  193.014331][ T7506]  kobject_init_and_add+0xb2/0xf0
[  193.014358][ T7506]  ? alloc_workqueue_noprof+0xe0/0xb60
[  193.014387][ T7506]  gfs2_sys_fs_add+0xef/0x200
[  193.014416][ T7506]  gfs2_fill_super+0x896/0x1240
[  193.014436][ T7506]  ? sb_set_blocksize+0x8c/0x150
[  193.014461][ T7506]  ? setup_bdev_super+0x19d/0x330
[  193.014485][ T7506]  ? __pfx_gfs2_fill_super+0x10/0x10
[  193.014519][ T7506]  get_tree_bdev_flags+0x1c0/0x290
[  193.014546][ T7506]  gfs2_get_tree+0x26/0xd0
[  193.014578][ T7506]  vfs_get_tree+0x30/0x120
[  193.014598][ T7506]  path_mount+0x5a9/0x1350
[  193.014631][ T7506]  ? putname+0x78/0xe0
[  193.014662][ T7506]  __x64_sys_mount+0x1a3/0x1e0
[  193.014694][ T7506]  do_syscall_64+0xa4/0xf80
[  193.014728][ T7506]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  193.014750][ T7506] RIP: 0033:0x7f174c79c14a
[  193.014766][ T7506] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  193.014786][ T7506] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  193.014805][ T7506] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  193.014819][ T7506] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  193.014833][ T7506] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  193.014847][ T7506] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  193.014859][ T7506] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  193.014875][ T7506]  </TASK>
[  193.014885][ T7506] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  193.020647][ T6470] CPU: 1 UID: 0 PID: 6470 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  193.020673][ T6470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  193.020684][ T6470] Call Trace:
[  193.020689][ T6470]  <TASK>
[  193.020696][ T6470]  dump_stack_lvl+0x97/0xe0
[  193.020721][ T6470]  gfs2_withdraw.cold+0xa/0x77
[  193.020742][ T6470]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  193.020763][ T6470]  gfs2_ail1_flush+0x497/0x7e0
[  193.020800][ T6470]  gfs2_ail1_start+0x4f/0x80
[  193.020839][ T6470]  gfs2_log_flush+0xf9a/0x1170
[  193.020867][ T6470]  gfs2_kill_sb+0x3e/0x1e0
[  193.020899][ T6470]  deactivate_locked_super+0x4f/0x120
[  193.020924][ T6470]  deactivate_super+0xa4/0xc0
[  193.020948][ T6470]  cleanup_mnt+0x145/0x1f0
[  193.020972][ T6470]  task_work_run+0x95/0xf0
[  193.021004][ T6470]  exit_to_user_mode_loop+0xcf/0x440
[  193.021032][ T6470]  do_syscall_64+0x2b8/0xf80
[  193.021065][ T6470]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  193.021086][ T6470] RIP: 0033:0x7fcdcc79c117
[  193.021101][ T6470] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  193.021121][ T6470] RSP: 002b:00007ffd25697928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  193.021139][ T6470] RAX: 0000000000000000 RBX: 00007fcdcc80471f RCX: 00007fcdcc79c117
[  193.021152][ T6470] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd256979e0
[  193.021165][ T6470] RBP: 00007ffd256979e0 R08: 00007ffd256989e0 R09: 00000000ffffffff
[  193.021179][ T6470] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd25698a70
[  193.021192][ T6470] R13: 00007fcdcc80471f R14: 000000000002f18d R15: 00007ffd25698ab0
[  193.021207][ T6470]  </TASK>
[  193.021214][ T6470] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  193.030547][ T7506] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  193.087337][ T1309] ieee802154 phy0 wpan0: encryption failed: -22
[  193.097225][ T7518] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  193.106843][ T1309] ieee802154 phy1 wpan1: encryption failed: -22
[  193.109060][ T7518] CPU: 0 UID: 0 PID: 7518 Comm: syz.1.139 Not tainted syzkaller #0 PREEMPT(full) 
[  193.109085][ T7518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  193.109097][ T7518] Call Trace:
[  193.109103][ T7518]  <TASK>
[  193.109110][ T7518]  dump_stack_lvl+0x97/0xe0
[  193.109137][ T7518]  sysfs_warn_dup.cold+0x1c/0x28
[  193.109170][ T7518]  sysfs_create_dir_ns+0x129/0x140
[  193.109197][ T7518]  kobject_add_internal+0x104/0x310
[  193.109234][ T7518]  kobject_init_and_add+0xb2/0xf0
[  193.109261][ T7518]  ? alloc_workqueue_noprof+0xe0/0xb60
[  193.109288][ T7518]  gfs2_sys_fs_add+0xef/0x200
[  193.109318][ T7518]  gfs2_fill_super+0x896/0x1240
[  193.109339][ T7518]  ? sb_set_blocksize+0x8c/0x150
[  193.109363][ T7518]  ? setup_bdev_super+0x19d/0x330
[  193.109386][ T7518]  ? __pfx_gfs2_fill_super+0x10/0x10
[  193.109419][ T7518]  get_tree_bdev_flags+0x1c0/0x290
[  193.109446][ T7518]  gfs2_get_tree+0x26/0xd0
[  193.109478][ T7518]  vfs_get_tree+0x30/0x120
[  193.109497][ T7518]  path_mount+0x5a9/0x1350
[  193.109529][ T7518]  ? putname+0x78/0xe0
[  193.109559][ T7518]  __x64_sys_mount+0x1a3/0x1e0
[  193.109592][ T7518]  do_syscall_64+0xa4/0xf80
[  193.109625][ T7518]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  193.109646][ T7518] RIP: 0033:0x7fd53b19c14a
[  193.109662][ T7518] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  193.109683][ T7518] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  193.109701][ T7518] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  193.109715][ T7518] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  193.109728][ T7518] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  193.109741][ T7518] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  193.109758][ T7518] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  193.109774][ T7518]  </TASK>
[  193.109786][ T7518] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  193.157560][ T7511] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  193.162662][ T7518] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  193.248765][ T7511] CPU: 1 UID: 0 PID: 7511 Comm: syz.0.137 Not tainted syzkaller #0 PREEMPT(full) 
[  193.248794][ T7511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  193.248806][ T7511] Call Trace:
[  193.248812][ T7511]  <TASK>
[  193.248818][ T7511]  dump_stack_lvl+0x97/0xe0
[  193.248845][ T7511]  sysfs_warn_dup.cold+0x1c/0x28
[  193.248878][ T7511]  sysfs_create_dir_ns+0x129/0x140
[  193.248905][ T7511]  kobject_add_internal+0x104/0x310
[  193.248932][ T7511]  kobject_init_and_add+0xb2/0xf0
[  193.248960][ T7511]  ? alloc_workqueue_noprof+0xe0/0xb60
[  193.248989][ T7511]  gfs2_sys_fs_add+0xef/0x200
[  193.249020][ T7511]  gfs2_fill_super+0x896/0x1240
[  193.249040][ T7511]  ? sb_set_blocksize+0x8c/0x150
[  193.249065][ T7511]  ? setup_bdev_super+0x19d/0x330
[  193.249094][ T7511]  ? __pfx_gfs2_fill_super+0x10/0x10
[  193.249129][ T7511]  get_tree_bdev_flags+0x1c0/0x290
[  193.249157][ T7511]  gfs2_get_tree+0x26/0xd0
[  193.249189][ T7511]  vfs_get_tree+0x30/0x120
[  193.249209][ T7511]  path_mount+0x5a9/0x1350
[  193.249242][ T7511]  ? putname+0x78/0xe0
[  193.249273][ T7511]  __x64_sys_mount+0x1a3/0x1e0
[  193.249306][ T7511]  do_syscall_64+0xa4/0xf80
[  193.249340][ T7511]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  193.249363][ T7511] RIP: 0033:0x7f6e1879c14a
[  193.249378][ T7511] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  193.249399][ T7511] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  193.249418][ T7511] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  193.249432][ T7511] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  193.249446][ T7511] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  193.249459][ T7511] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  193.249473][ T7511] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  193.249489][ T7511]  </TASK>
[  193.249497][ T7511] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  194.441983][ T7511] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  198.098224][ T5936] gfs2: fsid=syz:syz.0: file system withdrawn
[  198.194723][ T7537] set_capacity_and_notify: 3 callbacks suppressed
[  198.194740][ T7537] loop4: detected capacity change from 0 to 32768
[  198.209607][ T7537] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  198.218297][ T7537] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  198.226489][ T7537] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  198.235247][ T5936] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  198.243083][ T5936] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  198.254935][ T5936] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 11ms
[  198.263001][ T5936] gfs2: fsid=syz:syz.0: jid=0: Done
[  198.268432][ T7537] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  198.294685][ T7537] gfs2: fsid=syz:syz.0: found 1 quota changes
[  198.306024][ T6470] syz-executor: attempt to access beyond end of device
[  198.306024][ T6470] loop4: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  198.321372][ T6470] Buffer I/O error on dev loop4, logical block 8589934885, lost async page write
[  198.330964][ T6470] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  198.344824][ T6470] CPU: 1 UID: 0 PID: 6470 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  198.344846][ T6470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  198.344855][ T6470] Call Trace:
[  198.344859][ T6470]  <TASK>
[  198.344862][ T6470]  dump_stack_lvl+0x97/0xe0
[  198.344883][ T6470]  gfs2_withdraw.cold+0xa/0x77
[  198.344896][ T6470]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  198.344909][ T6470]  gfs2_ail1_flush+0x497/0x7e0
[  198.344932][ T6470]  gfs2_ail1_start+0x4f/0x80
[  198.344955][ T6470]  gfs2_log_flush+0xf9a/0x1170
[  198.344967][ T6470]  gfs2_kill_sb+0x3e/0x1e0
[  198.344987][ T6470]  deactivate_locked_super+0x4f/0x120
[  198.345002][ T6470]  deactivate_super+0xa4/0xc0
[  198.345016][ T6470]  cleanup_mnt+0x145/0x1f0
[  198.345032][ T6470]  task_work_run+0x95/0xf0
[  198.345051][ T6470]  exit_to_user_mode_loop+0xcf/0x440
[  198.345069][ T6470]  do_syscall_64+0x2b8/0xf80
[  198.345095][ T6470]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  198.345108][ T6470] RIP: 0033:0x7fcdcc79c117
[  198.345119][ T6470] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  198.345132][ T6470] RSP: 002b:00007ffd25697928 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  198.345144][ T6470] RAX: 0000000000000000 RBX: 00007fcdcc80471f RCX: 00007fcdcc79c117
[  198.345153][ T6470] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd256979e0
[  198.345160][ T6470] RBP: 00007ffd256979e0 R08: 00007ffd256989e0 R09: 00000000ffffffff
[  198.345168][ T6470] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd25698a70
[  198.345175][ T6470] R13: 00007fcdcc80471f R14: 00000000000305d0 R15: 00007ffd25698ab0
[  198.345185][ T6470]  </TASK>
[  198.345189][ T6470] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  203.538301][ T5936] gfs2: fsid=syz:syz.0: file system withdrawn
[  205.377298][ T7544] Bluetooth: hci6: command 0x0406 tx timeout
[  205.377408][ T5868] Bluetooth: hci1: command 0x0406 tx timeout
[  205.383336][ T7544] Bluetooth: hci3: command 0x0406 tx timeout
[  205.390324][ T5868] Bluetooth: hci2: command 0x0406 tx timeout
[  205.396288][ T7544] Bluetooth: hci4: command 0x0406 tx timeout
[  205.401915][ T5134] Bluetooth: hci0: command 0x0406 tx timeout
[  205.414271][ T5134] Bluetooth: hci5: command 0x0406 tx timeout
2026/01/30 15:13:00 executed programs: 138
[  206.124693][ T7554] loop6: detected capacity change from 0 to 32768
[  206.142982][ T7551] loop0: detected capacity change from 0 to 32768
[  206.158134][ T7554] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  206.176306][ T7559] loop4: detected capacity change from 0 to 32768
[  206.183358][ T7554] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  206.195247][ T7551] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.203756][ T7554] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  206.217150][ T7551] CPU: 0 UID: 0 PID: 7551 Comm: syz.0.141 Not tainted syzkaller #0 PREEMPT(full) 
[  206.217179][ T7551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.217192][ T7551] Call Trace:
[  206.217198][ T7551]  <TASK>
[  206.217204][ T7551]  dump_stack_lvl+0x97/0xe0
[  206.217232][ T7551]  sysfs_warn_dup.cold+0x1c/0x28
[  206.217265][ T7551]  sysfs_create_dir_ns+0x129/0x140
[  206.217293][ T7551]  kobject_add_internal+0x104/0x310
[  206.217320][ T7551]  kobject_init_and_add+0xb2/0xf0
[  206.217347][ T7551]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.217376][ T7551]  gfs2_sys_fs_add+0xef/0x200
[  206.217408][ T7551]  gfs2_fill_super+0x896/0x1240
[  206.217429][ T7551]  ? sb_set_blocksize+0x8c/0x150
[  206.217455][ T7551]  ? setup_bdev_super+0x19d/0x330
[  206.217478][ T7551]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.217521][ T7551]  get_tree_bdev_flags+0x1c0/0x290
[  206.217549][ T7551]  gfs2_get_tree+0x26/0xd0
[  206.217581][ T7551]  vfs_get_tree+0x30/0x120
[  206.217602][ T7551]  path_mount+0x5a9/0x1350
[  206.217635][ T7551]  ? putname+0x78/0xe0
[  206.217667][ T7551]  __x64_sys_mount+0x1a3/0x1e0
[  206.217700][ T7551]  do_syscall_64+0xa4/0xf80
[  206.217735][ T7551]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.217757][ T7551] RIP: 0033:0x7f6e1879c14a
[  206.217773][ T7551] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.217793][ T7551] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.217812][ T7551] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  206.217826][ T7551] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  206.217839][ T7551] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  206.217853][ T7551] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.217866][ T7551] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  206.217883][ T7551]  </TASK>
[  206.217894][ T7551] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.243197][ T7555] loop5: detected capacity change from 0 to 32768
[  206.247174][ T7559] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.271326][ T7561] loop3: detected capacity change from 0 to 32768
[  206.279473][ T2212] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  206.280579][ T7559] CPU: 1 UID: 0 PID: 7559 Comm: syz.4.145 Not tainted syzkaller #0 PREEMPT(full) 
[  206.280606][ T7559] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.280618][ T7559] Call Trace:
[  206.280624][ T7559]  <TASK>
[  206.280631][ T7559]  dump_stack_lvl+0x97/0xe0
[  206.280659][ T7559]  sysfs_warn_dup.cold+0x1c/0x28
[  206.280691][ T7559]  sysfs_create_dir_ns+0x129/0x140
[  206.280717][ T7559]  kobject_add_internal+0x104/0x310
[  206.280743][ T7559]  kobject_init_and_add+0xb2/0xf0
[  206.280769][ T7559]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.280797][ T7559]  gfs2_sys_fs_add+0xef/0x200
[  206.280827][ T7559]  gfs2_fill_super+0x896/0x1240
[  206.280847][ T7559]  ? sb_set_blocksize+0x8c/0x150
[  206.280872][ T7559]  ? setup_bdev_super+0x19d/0x330
[  206.280894][ T7559]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.280929][ T7559]  get_tree_bdev_flags+0x1c0/0x290
[  206.280955][ T7559]  gfs2_get_tree+0x26/0xd0
[  206.280987][ T7559]  vfs_get_tree+0x30/0x120
[  206.281006][ T7559]  path_mount+0x5a9/0x1350
[  206.281037][ T7559]  ? putname+0x78/0xe0
[  206.281068][ T7559]  __x64_sys_mount+0x1a3/0x1e0
[  206.281099][ T7559]  do_syscall_64+0xa4/0xf80
[  206.281133][ T7559]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.281154][ T7559] RIP: 0033:0x7fcdcc79c14a
[  206.281169][ T7559] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.281189][ T7559] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.281208][ T7559] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  206.281222][ T7559] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  206.281235][ T7559] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  206.281249][ T7559] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.281262][ T7559] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  206.281278][ T7559]  </TASK>
[  206.281287][ T7559] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.284642][ T2212] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  206.292820][ T7560] loop1: detected capacity change from 0 to 32768
[  206.318966][ T7559] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  206.332942][ T7551] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  206.341387][ T2212] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 56ms
[  206.377064][ T7557] loop2: detected capacity change from 0 to 32768
[  206.396778][ T2212] gfs2: fsid=syz:syz.0: jid=0: Done
[  206.437536][ T7555] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.475190][ T7554] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  206.478116][ T7555] CPU: 1 UID: 0 PID: 7555 Comm: syz.5.146 Not tainted syzkaller #0 PREEMPT(full) 
[  206.478144][ T7555] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.478156][ T7555] Call Trace:
[  206.478161][ T7555]  <TASK>
[  206.478168][ T7555]  dump_stack_lvl+0x97/0xe0
[  206.478195][ T7555]  sysfs_warn_dup.cold+0x1c/0x28
[  206.478227][ T7555]  sysfs_create_dir_ns+0x129/0x140
[  206.478255][ T7555]  kobject_add_internal+0x104/0x310
[  206.478282][ T7555]  kobject_init_and_add+0xb2/0xf0
[  206.478308][ T7555]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.478336][ T7555]  gfs2_sys_fs_add+0xef/0x200
[  206.478366][ T7555]  gfs2_fill_super+0x896/0x1240
[  206.478386][ T7555]  ? sb_set_blocksize+0x8c/0x150
[  206.478411][ T7555]  ? setup_bdev_super+0x19d/0x330
[  206.478433][ T7555]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.478478][ T7555]  get_tree_bdev_flags+0x1c0/0x290
[  206.478505][ T7555]  gfs2_get_tree+0x26/0xd0
[  206.478537][ T7555]  vfs_get_tree+0x30/0x120
[  206.478556][ T7555]  path_mount+0x5a9/0x1350
[  206.478589][ T7555]  ? putname+0x78/0xe0
[  206.478619][ T7555]  __x64_sys_mount+0x1a3/0x1e0
[  206.478652][ T7555]  do_syscall_64+0xa4/0xf80
[  206.478686][ T7555]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.478707][ T7555] RIP: 0033:0x7fac29d9c14a
[  206.478722][ T7555] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.478742][ T7555] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.478761][ T7555] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  206.478775][ T7555] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  206.478789][ T7555] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  206.478802][ T7555] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.478815][ T7555] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  206.478831][ T7555]  </TASK>
[  206.478842][ T7555] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.484041][ T7561] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.489765][ T7555] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  206.496896][ T7561] CPU: 1 UID: 0 PID: 7561 Comm: syz.3.144 Not tainted syzkaller #0 PREEMPT(full) 
[  206.496923][ T7561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.496936][ T7561] Call Trace:
[  206.496942][ T7561]  <TASK>
[  206.496948][ T7561]  dump_stack_lvl+0x97/0xe0
[  206.496974][ T7561]  sysfs_warn_dup.cold+0x1c/0x28
[  206.497006][ T7561]  sysfs_create_dir_ns+0x129/0x140
[  206.497034][ T7561]  kobject_add_internal+0x104/0x310
[  206.497060][ T7561]  kobject_init_and_add+0xb2/0xf0
[  206.497091][ T7561]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.497121][ T7561]  gfs2_sys_fs_add+0xef/0x200
[  206.497151][ T7561]  gfs2_fill_super+0x896/0x1240
[  206.497170][ T7561]  ? sb_set_blocksize+0x8c/0x150
[  206.497192][ T7561]  ? setup_bdev_super+0x19d/0x330
[  206.497219][ T7561]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.497253][ T7561]  get_tree_bdev_flags+0x1c0/0x290
[  206.497281][ T7561]  gfs2_get_tree+0x26/0xd0
[  206.497312][ T7561]  vfs_get_tree+0x30/0x120
[  206.497332][ T7561]  path_mount+0x5a9/0x1350
[  206.497364][ T7561]  ? putname+0x78/0xe0
[  206.497402][ T7561]  __x64_sys_mount+0x1a3/0x1e0
[  206.497441][ T7561]  do_syscall_64+0xa4/0xf80
[  206.497474][ T7561]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.497496][ T7561] RIP: 0033:0x7f174c79c14a
[  206.497511][ T7561] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.497532][ T7561] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.497551][ T7561] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  206.497565][ T7561] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  206.497578][ T7561] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  206.497590][ T7561] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.497601][ T7561] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  206.497617][ T7561]  </TASK>
[  206.498762][ T7561] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.519047][ T7560] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.521346][ T7561] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  206.553744][ T7560] CPU: 0 UID: 0 PID: 7560 Comm: syz.1.142 Not tainted syzkaller #0 PREEMPT(full) 
[  206.553770][ T7560] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.553783][ T7560] Call Trace:
[  206.553790][ T7560]  <TASK>
[  206.553798][ T7560]  dump_stack_lvl+0x97/0xe0
[  206.553829][ T7560]  sysfs_warn_dup.cold+0x1c/0x28
[  206.553863][ T7560]  sysfs_create_dir_ns+0x129/0x140
[  206.553890][ T7560]  kobject_add_internal+0x104/0x310
[  206.553916][ T7560]  kobject_init_and_add+0xb2/0xf0
[  206.553942][ T7560]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.553969][ T7560]  gfs2_sys_fs_add+0xef/0x200
[  206.553999][ T7560]  gfs2_fill_super+0x896/0x1240
[  206.554019][ T7560]  ? sb_set_blocksize+0x8c/0x150
[  206.554047][ T7560]  ? setup_bdev_super+0x19d/0x330
[  206.554069][ T7560]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.554102][ T7560]  get_tree_bdev_flags+0x1c0/0x290
[  206.554129][ T7560]  gfs2_get_tree+0x26/0xd0
[  206.554161][ T7560]  vfs_get_tree+0x30/0x120
[  206.554181][ T7560]  path_mount+0x5a9/0x1350
[  206.554212][ T7560]  ? putname+0x78/0xe0
[  206.554243][ T7560]  __x64_sys_mount+0x1a3/0x1e0
[  206.554275][ T7560]  do_syscall_64+0xa4/0xf80
[  206.554309][ T7560]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.554331][ T7560] RIP: 0033:0x7fd53b19c14a
[  206.554346][ T7560] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.554367][ T7560] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.554386][ T7560] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  206.554400][ T7560] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  206.554413][ T7560] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  206.554426][ T7560] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.554439][ T7560] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  206.554456][ T7560]  </TASK>
[  206.554467][ T7560] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.585871][ T7557] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  206.701096][ T7560] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  206.705208][ T7557] CPU: 1 UID: 0 PID: 7557 Comm: syz.2.143 Not tainted syzkaller #0 PREEMPT(full) 
[  206.705234][ T7557] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  206.705246][ T7557] Call Trace:
[  206.705252][ T7557]  <TASK>
[  206.705259][ T7557]  dump_stack_lvl+0x97/0xe0
[  206.705287][ T7557]  sysfs_warn_dup.cold+0x1c/0x28
[  206.705319][ T7557]  sysfs_create_dir_ns+0x129/0x140
[  206.705347][ T7557]  kobject_add_internal+0x104/0x310
[  206.705374][ T7557]  kobject_init_and_add+0xb2/0xf0
[  206.705400][ T7557]  ? alloc_workqueue_noprof+0xe0/0xb60
[  206.705435][ T7557]  gfs2_sys_fs_add+0xef/0x200
[  206.705465][ T7557]  gfs2_fill_super+0x896/0x1240
[  206.705485][ T7557]  ? sb_set_blocksize+0x8c/0x150
[  206.705509][ T7557]  ? setup_bdev_super+0x19d/0x330
[  206.705531][ T7557]  ? __pfx_gfs2_fill_super+0x10/0x10
[  206.705566][ T7557]  get_tree_bdev_flags+0x1c0/0x290
[  206.705593][ T7557]  gfs2_get_tree+0x26/0xd0
[  206.705624][ T7557]  vfs_get_tree+0x30/0x120
[  206.705644][ T7557]  path_mount+0x5a9/0x1350
[  206.705675][ T7557]  ? putname+0x78/0xe0
[  206.705705][ T7557]  __x64_sys_mount+0x1a3/0x1e0
[  206.705737][ T7557]  do_syscall_64+0xa4/0xf80
[  206.705770][ T7557]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  206.705792][ T7557] RIP: 0033:0x7fdf1779c14a
[  206.705807][ T7557] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  206.705827][ T7557] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  206.705845][ T7557] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  206.705859][ T7557] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  206.705872][ T7557] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  206.705885][ T7557] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  206.705898][ T7557] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  206.705914][ T7557]  </TASK>
[  206.705924][ T7557] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  206.805603][ T7554] gfs2: fsid=syz:syz.0: found 1 quota changes
[  206.819876][ T7557] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  207.129477][ T7581] loop4: detected capacity change from 0 to 32768
[  207.271831][ T7584] loop1: detected capacity change from 0 to 32768
[  207.385053][ T6478] syz-executor: attempt to access beyond end of device
[  207.385053][ T6478] loop6: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  207.409124][ T7586] loop5: detected capacity change from 0 to 32768
[  207.442147][ T6478] Buffer I/O error on dev loop6, logical block 8589934885, lost async page write
[  207.613426][ T7581] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  207.619931][ T6478] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  207.701634][ T7581] CPU: 1 UID: 0 PID: 7581 Comm: syz.4.148 Not tainted syzkaller #0 PREEMPT(full) 
[  207.701662][ T7581] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  207.701674][ T7581] Call Trace:
[  207.701680][ T7581]  <TASK>
[  207.701686][ T7581]  dump_stack_lvl+0x97/0xe0
[  207.701714][ T7581]  sysfs_warn_dup.cold+0x1c/0x28
[  207.701747][ T7581]  sysfs_create_dir_ns+0x129/0x140
[  207.701775][ T7581]  kobject_add_internal+0x104/0x310
[  207.701802][ T7581]  kobject_init_and_add+0xb2/0xf0
[  207.701829][ T7581]  ? alloc_workqueue_noprof+0xe0/0xb60
[  207.701857][ T7581]  gfs2_sys_fs_add+0xef/0x200
[  207.701889][ T7581]  gfs2_fill_super+0x896/0x1240
[  207.701909][ T7581]  ? sb_set_blocksize+0x8c/0x150
[  207.701935][ T7581]  ? setup_bdev_super+0x19d/0x330
[  207.701957][ T7581]  ? __pfx_gfs2_fill_super+0x10/0x10
[  207.701992][ T7581]  get_tree_bdev_flags+0x1c0/0x290
[  207.702020][ T7581]  gfs2_get_tree+0x26/0xd0
[  207.702052][ T7581]  vfs_get_tree+0x30/0x120
[  207.702072][ T7581]  path_mount+0x5a9/0x1350
[  207.702104][ T7581]  ? putname+0x78/0xe0
[  207.702135][ T7581]  __x64_sys_mount+0x1a3/0x1e0
[  207.702170][ T7581]  do_syscall_64+0xa4/0xf80
[  207.702203][ T7581]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  207.702226][ T7581] RIP: 0033:0x7fcdcc79c14a
[  207.702241][ T7581] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  207.702262][ T7581] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  207.702282][ T7581] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  207.702296][ T7581] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  207.702309][ T7581] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  207.702388][ T7581] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  207.702401][ T7581] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  207.702420][ T7581]  </TASK>
[  207.702435][ T7581] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  207.710617][ T6478] CPU: 0 UID: 0 PID: 6478 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  207.710643][ T6478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  207.710656][ T6478] Call Trace:
[  207.710663][ T6478]  <TASK>
[  207.710672][ T6478]  dump_stack_lvl+0x97/0xe0
[  207.710700][ T6478]  gfs2_withdraw.cold+0xa/0x77
[  207.710722][ T6478]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  207.710744][ T6478]  gfs2_ail1_flush+0x497/0x7e0
[  207.710782][ T6478]  gfs2_ail1_start+0x4f/0x80
[  207.710821][ T6478]  gfs2_log_flush+0xf9a/0x1170
[  207.710844][ T6478]  gfs2_kill_sb+0x3e/0x1e0
[  207.710877][ T6478]  deactivate_locked_super+0x4f/0x120
[  207.710904][ T6478]  deactivate_super+0xa4/0xc0
[  207.710926][ T6478]  cleanup_mnt+0x145/0x1f0
[  207.710952][ T6478]  task_work_run+0x95/0xf0
[  207.710984][ T6478]  exit_to_user_mode_loop+0xcf/0x440
[  207.711013][ T6478]  do_syscall_64+0x2b8/0xf80
[  207.711048][ T6478]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  207.711071][ T6478] RIP: 0033:0x7f533af9c117
[  207.711087][ T6478] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  207.711108][ T6478] RSP: 002b:00007ffd17212568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  207.711128][ T6478] RAX: 0000000000000000 RBX: 00007f533b00471f RCX: 00007f533af9c117
[  207.711141][ T6478] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd17212620
[  207.711154][ T6478] RBP: 00007ffd17212620 R08: 00007ffd17213620 R09: 00000000ffffffff
[  207.711168][ T6478] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd172136b0
[  207.711181][ T6478] R13: 00007f533b00471f R14: 0000000000032401 R15: 00007ffd172136f0
[  207.711197][ T6478]  </TASK>
[  207.711204][ T6478] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  207.723121][ T7581] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  207.857364][ T7584] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  207.927431][ T7588] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  207.930105][ T7584] CPU: 0 UID: 0 PID: 7584 Comm: syz.1.149 Not tainted syzkaller #0 PREEMPT(full) 
[  207.930132][ T7584] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  207.930149][ T7584] Call Trace:
[  207.930168][ T7584]  <TASK>
[  207.930175][ T7584]  dump_stack_lvl+0x97/0xe0
[  207.930203][ T7584]  sysfs_warn_dup.cold+0x1c/0x28
[  207.930236][ T7584]  sysfs_create_dir_ns+0x129/0x140
[  207.930264][ T7584]  kobject_add_internal+0x104/0x310
[  207.930291][ T7584]  kobject_init_and_add+0xb2/0xf0
[  207.930317][ T7584]  ? alloc_workqueue_noprof+0xe0/0xb60
[  207.930346][ T7584]  gfs2_sys_fs_add+0xef/0x200
[  207.930377][ T7584]  gfs2_fill_super+0x896/0x1240
[  207.930396][ T7584]  ? sb_set_blocksize+0x8c/0x150
[  207.930418][ T7584]  ? setup_bdev_super+0x19d/0x330
[  207.930440][ T7584]  ? __pfx_gfs2_fill_super+0x10/0x10
[  207.930474][ T7584]  get_tree_bdev_flags+0x1c0/0x290
[  207.930502][ T7584]  gfs2_get_tree+0x26/0xd0
[  207.930534][ T7584]  vfs_get_tree+0x30/0x120
[  207.930560][ T7584]  path_mount+0x5a9/0x1350
[  207.930593][ T7584]  ? putname+0x78/0xe0
[  207.930623][ T7584]  __x64_sys_mount+0x1a3/0x1e0
[  207.930656][ T7584]  do_syscall_64+0xa4/0xf80
[  207.930690][ T7584]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  207.930713][ T7584] RIP: 0033:0x7fd53b19c14a
[  207.930728][ T7584] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  207.930749][ T7584] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  207.930768][ T7584] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  207.930782][ T7584] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  207.930796][ T7584] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  207.930810][ T7584] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  207.930823][ T7584] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  207.930839][ T7584]  </TASK>
[  207.930851][ T7584] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  207.946511][ T7586] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  207.956113][ T7584] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  207.979408][ T7588] CPU: 1 UID: 0 PID: 7588 Comm: syz.0.152 Not tainted syzkaller #0 PREEMPT(full) 
[  207.979437][ T7588] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  207.979450][ T7588] Call Trace:
[  207.979456][ T7588]  <TASK>
[  207.979462][ T7588]  dump_stack_lvl+0x97/0xe0
[  207.979491][ T7588]  sysfs_warn_dup.cold+0x1c/0x28
[  207.979524][ T7588]  sysfs_create_dir_ns+0x129/0x140
[  207.979661][ T7588]  kobject_add_internal+0x104/0x310
[  207.979688][ T7588]  kobject_init_and_add+0xb2/0xf0
[  207.979715][ T7588]  ? alloc_workqueue_noprof+0xe0/0xb60
[  207.979852][ T7588]  gfs2_sys_fs_add+0xef/0x200
[  207.979885][ T7588]  gfs2_fill_super+0x896/0x1240
[  207.979905][ T7588]  ? sb_set_blocksize+0x8c/0x150
[  207.979931][ T7588]  ? setup_bdev_super+0x19d/0x330
[  207.979956][ T7588]  ? __pfx_gfs2_fill_super+0x10/0x10
[  207.979988][ T7588]  get_tree_bdev_flags+0x1c0/0x290
[  207.980012][ T7588]  gfs2_get_tree+0x26/0xd0
[  207.980041][ T7588]  vfs_get_tree+0x30/0x120
[  207.980060][ T7588]  path_mount+0x5a9/0x1350
[  207.980094][ T7588]  ? putname+0x78/0xe0
[  207.980126][ T7588]  __x64_sys_mount+0x1a3/0x1e0
[  207.980159][ T7588]  do_syscall_64+0xa4/0xf80
[  207.980193][ T7588]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  207.980216][ T7588] RIP: 0033:0x7f6e1879c14a
[  207.980231][ T7588] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  207.980321][ T7588] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  207.980338][ T7588] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  207.980350][ T7588] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  207.980383][ T7588] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  207.980394][ T7588] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  207.980405][ T7588] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  207.980422][ T7588]  </TASK>
[  207.980435][ T7588] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  207.997262][ T7586] CPU: 0 UID: 0 PID: 7586 Comm: syz.5.151 Not tainted syzkaller #0 PREEMPT(full) 
[  207.997297][ T7586] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  207.997310][ T7586] Call Trace:
[  207.997317][ T7586]  <TASK>
[  207.997325][ T7586]  dump_stack_lvl+0x97/0xe0
[  207.997352][ T7586]  sysfs_warn_dup.cold+0x1c/0x28
[  207.997384][ T7586]  sysfs_create_dir_ns+0x129/0x140
[  207.997412][ T7586]  kobject_add_internal+0x104/0x310
[  207.997439][ T7586]  kobject_init_and_add+0xb2/0xf0
[  207.997466][ T7586]  ? alloc_workqueue_noprof+0xe0/0xb60
[  207.997493][ T7586]  gfs2_sys_fs_add+0xef/0x200
[  207.997523][ T7586]  gfs2_fill_super+0x896/0x1240
[  207.997543][ T7586]  ? sb_set_blocksize+0x8c/0x150
[  207.997567][ T7586]  ? setup_bdev_super+0x19d/0x330
[  207.997590][ T7586]  ? __pfx_gfs2_fill_super+0x10/0x10
[  207.997679][ T7586]  get_tree_bdev_flags+0x1c0/0x290
[  207.997711][ T7586]  gfs2_get_tree+0x26/0xd0
[  207.997741][ T7586]  vfs_get_tree+0x30/0x120
[  207.997759][ T7586]  path_mount+0x5a9/0x1350
[  207.997787][ T7586]  ? putname+0x78/0xe0
[  207.997817][ T7586]  __x64_sys_mount+0x1a3/0x1e0
[  207.997850][ T7586]  do_syscall_64+0xa4/0xf80
[  207.997886][ T7586]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  207.997908][ T7586] RIP: 0033:0x7fac29d9c14a
[  207.997923][ T7586] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  207.997944][ T7586] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  207.997963][ T7586] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  207.997978][ T7586] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  207.997992][ T7586] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  207.998005][ T7586] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  207.998018][ T7586] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  207.998035][ T7586]  </TASK>
[  207.998048][ T7586] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  208.003286][ T7588] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  208.008829][ T7586] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  208.013504][ T7590] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  208.069851][ T7600] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  208.080036][ T7590] CPU: 1 UID: 0 PID: 7590 Comm: syz.3.150 Not tainted syzkaller #0 PREEMPT(full) 
[  208.080063][ T7590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  208.080075][ T7590] Call Trace:
[  208.080080][ T7590]  <TASK>
[  208.080087][ T7590]  dump_stack_lvl+0x97/0xe0
[  208.080115][ T7590]  sysfs_warn_dup.cold+0x1c/0x28
[  208.080148][ T7590]  sysfs_create_dir_ns+0x129/0x140
[  208.080175][ T7590]  kobject_add_internal+0x104/0x310
[  208.080208][ T7590]  kobject_init_and_add+0xb2/0xf0
[  208.080235][ T7590]  ? alloc_workqueue_noprof+0xe0/0xb60
[  208.080262][ T7590]  gfs2_sys_fs_add+0xef/0x200
[  208.080292][ T7590]  gfs2_fill_super+0x896/0x1240
[  208.080313][ T7590]  ? sb_set_blocksize+0x8c/0x150
[  208.080338][ T7590]  ? setup_bdev_super+0x19d/0x330
[  208.080359][ T7590]  ? __pfx_gfs2_fill_super+0x10/0x10
[  208.080401][ T7590]  get_tree_bdev_flags+0x1c0/0x290
[  208.080428][ T7590]  gfs2_get_tree+0x26/0xd0
[  208.080460][ T7590]  vfs_get_tree+0x30/0x120
[  208.080480][ T7590]  path_mount+0x5a9/0x1350
[  208.080512][ T7590]  ? putname+0x78/0xe0
[  208.080543][ T7590]  __x64_sys_mount+0x1a3/0x1e0
[  208.080575][ T7590]  do_syscall_64+0xa4/0xf80
[  208.080609][ T7590]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  208.080630][ T7590] RIP: 0033:0x7f174c79c14a
[  208.080646][ T7590] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  208.080665][ T7590] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  208.080686][ T7590] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  208.080700][ T7590] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  208.080714][ T7590] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  208.080727][ T7590] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  208.080739][ T7590] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  208.080756][ T7590]  </TASK>
[  208.080770][ T7590] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  208.094412][ T7600] CPU: 0 UID: 0 PID: 7600 Comm: syz.2.154 Not tainted syzkaller #0 PREEMPT(full) 
[  208.094442][ T7600] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  208.094455][ T7600] Call Trace:
[  208.094461][ T7600]  <TASK>
[  208.094467][ T7600]  dump_stack_lvl+0x97/0xe0
[  208.094494][ T7600]  sysfs_warn_dup.cold+0x1c/0x28
[  208.094525][ T7600]  sysfs_create_dir_ns+0x129/0x140
[  208.094553][ T7600]  kobject_add_internal+0x104/0x310
[  208.094580][ T7600]  kobject_init_and_add+0xb2/0xf0
[  208.094606][ T7600]  ? alloc_workqueue_noprof+0xe0/0xb60
[  208.094634][ T7600]  gfs2_sys_fs_add+0xef/0x200
[  208.094664][ T7600]  gfs2_fill_super+0x896/0x1240
[  208.094684][ T7600]  ? sb_set_blocksize+0x8c/0x150
[  208.094709][ T7600]  ? setup_bdev_super+0x19d/0x330
[  208.094732][ T7600]  ? __pfx_gfs2_fill_super+0x10/0x10
[  208.094764][ T7600]  get_tree_bdev_flags+0x1c0/0x290
[  208.094791][ T7600]  gfs2_get_tree+0x26/0xd0
[  208.094822][ T7600]  vfs_get_tree+0x30/0x120
[  208.094842][ T7600]  path_mount+0x5a9/0x1350
[  208.094871][ T7600]  ? putname+0x78/0xe0
[  208.094901][ T7600]  __x64_sys_mount+0x1a3/0x1e0
[  208.094933][ T7600]  do_syscall_64+0xa4/0xf80
[  208.094967][ T7600]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  208.094988][ T7600] RIP: 0033:0x7fdf1779c14a
[  208.095004][ T7600] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  208.095024][ T7600] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  208.095044][ T7600] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  208.095057][ T7600] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  208.095071][ T7600] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  208.095084][ T7600] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  208.095096][ T7600] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  208.095112][ T7600]  </TASK>
[  208.095121][ T7600] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  208.147479][ T7590] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  208.154531][ T7600] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  212.898237][ T2212] gfs2: fsid=syz:syz.0: file system withdrawn
[  212.985882][ T7615] set_capacity_and_notify: 3 callbacks suppressed
[  212.985892][ T7615] loop6: detected capacity change from 0 to 32768
[  213.002881][ T7615] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  213.011451][ T7615] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  213.024092][ T7615] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  213.032381][ T6734] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  213.039915][ T6734] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  213.056830][ T6734] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 16ms
[  213.064523][ T6734] gfs2: fsid=syz:syz.0: jid=0: Done
[  213.069891][ T7615] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  213.099083][ T7615] gfs2: fsid=syz:syz.0: found 1 quota changes
[  213.108366][ T6478] syz-executor: attempt to access beyond end of device
[  213.108366][ T6478] loop6: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  213.124070][ T6478] Buffer I/O error on dev loop6, logical block 8589934885, lost async page write
[  213.133316][ T6478] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  213.146531][ T6478] CPU: 1 UID: 0 PID: 6478 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  213.146548][ T6478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  213.146555][ T6478] Call Trace:
[  213.146560][ T6478]  <TASK>
[  213.146565][ T6478]  dump_stack_lvl+0x97/0xe0
[  213.146582][ T6478]  gfs2_withdraw.cold+0xa/0x77
[  213.146599][ T6478]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  213.146614][ T6478]  gfs2_ail1_flush+0x497/0x7e0
[  213.146637][ T6478]  gfs2_ail1_start+0x4f/0x80
[  213.146660][ T6478]  gfs2_log_flush+0xf9a/0x1170
[  213.146672][ T6478]  gfs2_kill_sb+0x3e/0x1e0
[  213.146690][ T6478]  deactivate_locked_super+0x4f/0x120
[  213.146706][ T6478]  deactivate_super+0xa4/0xc0
[  213.146719][ T6478]  cleanup_mnt+0x145/0x1f0
[  213.146734][ T6478]  task_work_run+0x95/0xf0
[  213.146752][ T6478]  exit_to_user_mode_loop+0xcf/0x440
[  213.146768][ T6478]  do_syscall_64+0x2b8/0xf80
[  213.146789][ T6478]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  213.146802][ T6478] RIP: 0033:0x7f533af9c117
[  213.146812][ T6478] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  213.146824][ T6478] RSP: 002b:00007ffd17212568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  213.146836][ T6478] RAX: 0000000000000000 RBX: 00007f533b00471f RCX: 00007f533af9c117
[  213.146844][ T6478] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd17212620
[  213.146851][ T6478] RBP: 00007ffd17212620 R08: 00007ffd17213620 R09: 00000000ffffffff
[  213.146859][ T6478] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd172136b0
[  213.146866][ T6478] R13: 00007f533b00471f R14: 0000000000033fa1 R15: 00007ffd172136f0
[  213.146882][ T6478]  </TASK>
[  213.146886][ T6478] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  218.338144][ T6734] gfs2: fsid=syz:syz.0: file system withdrawn
2026/01/30 15:13:15 executed programs: 152
[  220.854211][ T7626] loop0: detected capacity change from 0 to 32768
[  220.907525][ T7626] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  220.926373][ T7626] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  220.950016][ T7631] loop1: detected capacity change from 0 to 32768
[  220.956854][ T7627] loop4: detected capacity change from 0 to 32768
[  220.963941][ T7626] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  220.987820][ T7632] loop5: detected capacity change from 0 to 32768
[  220.996526][ T7634] loop3: detected capacity change from 0 to 32768
[  221.004734][ T7627] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.012477][ T7634] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.017503][ T5936] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  221.027503][ T5936] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  221.037354][ T7627] CPU: 1 UID: 0 PID: 7627 Comm: syz.4.159 Not tainted syzkaller #0 PREEMPT(full) 
[  221.037381][ T7627] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.037393][ T7627] Call Trace:
[  221.037399][ T7627]  <TASK>
[  221.037405][ T7627]  dump_stack_lvl+0x97/0xe0
[  221.037433][ T7627]  sysfs_warn_dup.cold+0x1c/0x28
[  221.037465][ T7627]  sysfs_create_dir_ns+0x129/0x140
[  221.037493][ T7627]  kobject_add_internal+0x104/0x310
[  221.037521][ T7627]  kobject_init_and_add+0xb2/0xf0
[  221.037548][ T7627]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.037575][ T7627]  gfs2_sys_fs_add+0xef/0x200
[  221.037605][ T7627]  gfs2_fill_super+0x896/0x1240
[  221.037624][ T7627]  ? sb_set_blocksize+0x8c/0x150
[  221.037649][ T7627]  ? setup_bdev_super+0x19d/0x330
[  221.037671][ T7627]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.037706][ T7627]  get_tree_bdev_flags+0x1c0/0x290
[  221.037731][ T7627]  gfs2_get_tree+0x26/0xd0
[  221.037761][ T7627]  vfs_get_tree+0x30/0x120
[  221.037781][ T7627]  path_mount+0x5a9/0x1350
[  221.037813][ T7627]  ? putname+0x78/0xe0
[  221.037843][ T7627]  __x64_sys_mount+0x1a3/0x1e0
[  221.037876][ T7627]  do_syscall_64+0xa4/0xf80
[  221.037910][ T7627]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.037931][ T7627] RIP: 0033:0x7fcdcc79c14a
[  221.037946][ T7627] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.037965][ T7627] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.037985][ T7627] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  221.037999][ T7627] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  221.038013][ T7627] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  221.038027][ T7627] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.038039][ T7627] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  221.038055][ T7627]  </TASK>
[  221.038073][ T7627] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.057303][ T7634] CPU: 0 UID: 0 PID: 7634 Comm: syz.3.158 Not tainted syzkaller #0 PREEMPT(full) 
[  221.057339][ T7634] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.057351][ T7634] Call Trace:
[  221.057356][ T7634]  <TASK>
[  221.057362][ T7634]  dump_stack_lvl+0x97/0xe0
[  221.057390][ T7634]  sysfs_warn_dup.cold+0x1c/0x28
[  221.057424][ T7634]  sysfs_create_dir_ns+0x129/0x140
[  221.057453][ T7634]  kobject_add_internal+0x104/0x310
[  221.057479][ T7634]  kobject_init_and_add+0xb2/0xf0
[  221.057506][ T7634]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.057534][ T7634]  gfs2_sys_fs_add+0xef/0x200
[  221.057565][ T7634]  gfs2_fill_super+0x896/0x1240
[  221.057585][ T7634]  ? sb_set_blocksize+0x8c/0x150
[  221.057610][ T7634]  ? setup_bdev_super+0x19d/0x330
[  221.057633][ T7634]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.057668][ T7634]  get_tree_bdev_flags+0x1c0/0x290
[  221.057695][ T7634]  gfs2_get_tree+0x26/0xd0
[  221.057725][ T7634]  vfs_get_tree+0x30/0x120
[  221.057743][ T7634]  path_mount+0x5a9/0x1350
[  221.057771][ T7634]  ? putname+0x78/0xe0
[  221.057802][ T7634]  __x64_sys_mount+0x1a3/0x1e0
[  221.057833][ T7634]  do_syscall_64+0xa4/0xf80
[  221.057868][ T7634]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.057891][ T7634] RIP: 0033:0x7f174c79c14a
[  221.057907][ T7634] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.057927][ T7634] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.057946][ T7634] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  221.057960][ T7634] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  221.057973][ T7634] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  221.057987][ T7634] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.058000][ T7634] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  221.058016][ T7634]  </TASK>
[  221.058027][ T7634] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.062779][ T5936] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 35ms
[  221.093359][ T7627] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  221.099018][ T7633] loop6: detected capacity change from 0 to 32768
[  221.119770][ T7631] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.120832][ T5936] gfs2: fsid=syz:syz.0: jid=0: Done
[  221.131845][ T7635] loop2: detected capacity change from 0 to 32768
[  221.134736][ T7626] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  221.141539][ T7634] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  221.147833][ T7632] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.167191][ T7631] CPU: 1 UID: 0 PID: 7631 Comm: syz.1.156 Not tainted syzkaller #0 PREEMPT(full) 
[  221.167224][ T7631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.167237][ T7631] Call Trace:
[  221.167243][ T7631]  <TASK>
[  221.167249][ T7631]  dump_stack_lvl+0x97/0xe0
[  221.167278][ T7631]  sysfs_warn_dup.cold+0x1c/0x28
[  221.167310][ T7631]  sysfs_create_dir_ns+0x129/0x140
[  221.167338][ T7631]  kobject_add_internal+0x104/0x310
[  221.167364][ T7631]  kobject_init_and_add+0xb2/0xf0
[  221.167391][ T7631]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.167419][ T7631]  gfs2_sys_fs_add+0xef/0x200
[  221.167449][ T7631]  gfs2_fill_super+0x896/0x1240
[  221.167469][ T7631]  ? sb_set_blocksize+0x8c/0x150
[  221.167494][ T7631]  ? setup_bdev_super+0x19d/0x330
[  221.167517][ T7631]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.167551][ T7631]  get_tree_bdev_flags+0x1c0/0x290
[  221.167577][ T7631]  gfs2_get_tree+0x26/0xd0
[  221.167610][ T7631]  vfs_get_tree+0x30/0x120
[  221.167636][ T7631]  path_mount+0x5a9/0x1350
[  221.167668][ T7631]  ? putname+0x78/0xe0
[  221.167699][ T7631]  __x64_sys_mount+0x1a3/0x1e0
[  221.167732][ T7631]  do_syscall_64+0xa4/0xf80
[  221.167765][ T7631]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.167788][ T7631] RIP: 0033:0x7fd53b19c14a
[  221.167803][ T7631] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.167824][ T7631] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.167843][ T7631] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  221.167857][ T7631] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  221.167870][ T7631] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  221.167883][ T7631] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.167896][ T7631] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  221.167912][ T7631]  </TASK>
[  221.167924][ T7631] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.242524][ T7633] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.249077][ T7631] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  221.279059][ T7633] CPU: 0 UID: 0 PID: 7633 Comm: syz.6.161 Not tainted syzkaller #0 PREEMPT(full) 
[  221.279088][ T7633] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.279100][ T7633] Call Trace:
[  221.279106][ T7633]  <TASK>
[  221.279113][ T7633]  dump_stack_lvl+0x97/0xe0
[  221.279142][ T7633]  sysfs_warn_dup.cold+0x1c/0x28
[  221.279174][ T7633]  sysfs_create_dir_ns+0x129/0x140
[  221.279202][ T7633]  kobject_add_internal+0x104/0x310
[  221.279230][ T7633]  kobject_init_and_add+0xb2/0xf0
[  221.279254][ T7633]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.279279][ T7633]  gfs2_sys_fs_add+0xef/0x200
[  221.279315][ T7633]  gfs2_fill_super+0x896/0x1240
[  221.279335][ T7633]  ? sb_set_blocksize+0x8c/0x150
[  221.279360][ T7633]  ? setup_bdev_super+0x19d/0x330
[  221.279383][ T7633]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.279419][ T7633]  get_tree_bdev_flags+0x1c0/0x290
[  221.279445][ T7633]  gfs2_get_tree+0x26/0xd0
[  221.279476][ T7633]  vfs_get_tree+0x30/0x120
[  221.279496][ T7633]  path_mount+0x5a9/0x1350
[  221.279549][ T7633]  ? putname+0x78/0xe0
[  221.279579][ T7633]  __x64_sys_mount+0x1a3/0x1e0
[  221.279612][ T7633]  do_syscall_64+0xa4/0xf80
[  221.279646][ T7633]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.279668][ T7633] RIP: 0033:0x7f533af9c14a
[  221.279684][ T7633] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.279705][ T7633] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.279724][ T7633] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  221.279739][ T7633] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  221.279753][ T7633] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  221.279766][ T7633] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.279780][ T7633] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  221.279797][ T7633]  </TASK>
[  221.280553][ T7633] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.286060][ T7632] CPU: 1 UID: 0 PID: 7632 Comm: syz.5.160 Not tainted syzkaller #0 PREEMPT(full) 
[  221.286088][ T7632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.286100][ T7632] Call Trace:
[  221.286106][ T7632]  <TASK>
[  221.286112][ T7632]  dump_stack_lvl+0x97/0xe0
[  221.286140][ T7632]  sysfs_warn_dup.cold+0x1c/0x28
[  221.286173][ T7632]  sysfs_create_dir_ns+0x129/0x140
[  221.286202][ T7632]  kobject_add_internal+0x104/0x310
[  221.286230][ T7632]  kobject_init_and_add+0xb2/0xf0
[  221.286257][ T7632]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.286286][ T7632]  gfs2_sys_fs_add+0xef/0x200
[  221.286316][ T7632]  gfs2_fill_super+0x896/0x1240
[  221.286336][ T7632]  ? sb_set_blocksize+0x8c/0x150
[  221.286362][ T7632]  ? setup_bdev_super+0x19d/0x330
[  221.286386][ T7632]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.286421][ T7632]  get_tree_bdev_flags+0x1c0/0x290
[  221.286448][ T7632]  gfs2_get_tree+0x26/0xd0
[  221.286480][ T7632]  vfs_get_tree+0x30/0x120
[  221.286500][ T7632]  path_mount+0x5a9/0x1350
[  221.286532][ T7632]  ? putname+0x78/0xe0
[  221.286564][ T7632]  __x64_sys_mount+0x1a3/0x1e0
[  221.286597][ T7632]  do_syscall_64+0xa4/0xf80
[  221.286631][ T7632]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.286654][ T7632] RIP: 0033:0x7fac29d9c14a
[  221.286670][ T7632] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.286691][ T7632] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.286711][ T7632] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  221.286726][ T7632] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  221.286741][ T7632] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  221.286754][ T7632] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.286768][ T7632] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  221.286785][ T7632]  </TASK>
[  221.286796][ T7632] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.291650][ T7633] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  221.362283][ T7626] gfs2: fsid=syz:syz.0: found 1 quota changes
[  221.365395][ T7632] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  221.417815][ T7635] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  221.750964][ T7656] loop4: detected capacity change from 0 to 32768
[  221.891169][ T6448] syz-executor: attempt to access beyond end of device
[  221.891169][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  221.903915][ T7635] CPU: 1 UID: 0 PID: 7635 Comm: syz.2.157 Not tainted syzkaller #0 PREEMPT(full) 
[  221.903942][ T7635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  221.903954][ T7635] Call Trace:
[  221.903960][ T7635]  <TASK>
[  221.903968][ T7635]  dump_stack_lvl+0x97/0xe0
[  221.904067][ T7635]  sysfs_warn_dup.cold+0x1c/0x28
[  221.904101][ T7635]  sysfs_create_dir_ns+0x129/0x140
[  221.904129][ T7635]  kobject_add_internal+0x104/0x310
[  221.904157][ T7635]  kobject_init_and_add+0xb2/0xf0
[  221.904212][ T7635]  ? alloc_workqueue_noprof+0xe0/0xb60
[  221.904240][ T7635]  gfs2_sys_fs_add+0xef/0x200
[  221.904271][ T7635]  gfs2_fill_super+0x896/0x1240
[  221.904291][ T7635]  ? sb_set_blocksize+0x8c/0x150
[  221.904317][ T7635]  ? setup_bdev_super+0x19d/0x330
[  221.904341][ T7635]  ? __pfx_gfs2_fill_super+0x10/0x10
[  221.904376][ T7635]  get_tree_bdev_flags+0x1c0/0x290
[  221.904404][ T7635]  gfs2_get_tree+0x26/0xd0
[  221.904437][ T7635]  vfs_get_tree+0x30/0x120
[  221.904457][ T7635]  path_mount+0x5a9/0x1350
[  221.904489][ T7635]  ? putname+0x78/0xe0
[  221.904520][ T7635]  __x64_sys_mount+0x1a3/0x1e0
[  221.904554][ T7635]  do_syscall_64+0xa4/0xf80
[  221.904589][ T7635]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  221.904626][ T7635] RIP: 0033:0x7fdf1779c14a
[  221.904644][ T7635] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  221.904666][ T7635] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  221.904686][ T7635] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  221.904700][ T7635] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  221.904714][ T7635] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  221.904728][ T7635] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  221.904742][ T7635] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  221.904758][ T7635]  </TASK>
[  221.904773][ T7635] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  221.957099][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  222.077593][ T7662] loop1: detected capacity change from 0 to 32768
[  222.085778][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  222.140961][ T7656] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.142145][ T6448] CPU: 0 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  222.142172][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.142184][ T6448] Call Trace:
[  222.142190][ T6448]  <TASK>
[  222.142196][ T6448]  dump_stack_lvl+0x97/0xe0
[  222.142222][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  222.142242][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  222.142263][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  222.142301][ T6448]  gfs2_ail1_start+0x4f/0x80
[  222.142339][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  222.142361][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  222.142394][ T6448]  deactivate_locked_super+0x4f/0x120
[  222.142420][ T6448]  deactivate_super+0xa4/0xc0
[  222.142443][ T6448]  cleanup_mnt+0x145/0x1f0
[  222.142469][ T6448]  task_work_run+0x95/0xf0
[  222.142500][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  222.142528][ T6448]  do_syscall_64+0x2b8/0xf80
[  222.142562][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.142584][ T6448] RIP: 0033:0x7f6e1879c117
[  222.142599][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  222.142620][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  222.142639][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  222.142653][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  222.142666][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  222.142679][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  222.142692][ T6448] R13: 00007f6e1880471f R14: 0000000000035dad R15: 00007ffe33ddb6e0
[  222.142708][ T6448]  </TASK>
[  222.142714][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  222.159012][ T7658] loop6: detected capacity change from 0 to 32768
[  222.167152][ T7656] CPU: 0 UID: 0 PID: 7656 Comm: syz.4.162 Not tainted syzkaller #0 PREEMPT(full) 
[  222.167178][ T7656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.167190][ T7656] Call Trace:
[  222.167195][ T7656]  <TASK>
[  222.167202][ T7656]  dump_stack_lvl+0x97/0xe0
[  222.167233][ T7656]  sysfs_warn_dup.cold+0x1c/0x28
[  222.167266][ T7656]  sysfs_create_dir_ns+0x129/0x140
[  222.167293][ T7656]  kobject_add_internal+0x104/0x310
[  222.167320][ T7656]  kobject_init_and_add+0xb2/0xf0
[  222.167347][ T7656]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.167375][ T7656]  gfs2_sys_fs_add+0xef/0x200
[  222.167405][ T7656]  gfs2_fill_super+0x896/0x1240
[  222.167425][ T7656]  ? sb_set_blocksize+0x8c/0x150
[  222.167450][ T7656]  ? setup_bdev_super+0x19d/0x330
[  222.167472][ T7656]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.167507][ T7656]  get_tree_bdev_flags+0x1c0/0x290
[  222.167534][ T7656]  gfs2_get_tree+0x26/0xd0
[  222.167566][ T7656]  vfs_get_tree+0x30/0x120
[  222.167587][ T7656]  path_mount+0x5a9/0x1350
[  222.167620][ T7656]  ? putname+0x78/0xe0
[  222.167651][ T7656]  __x64_sys_mount+0x1a3/0x1e0
[  222.167684][ T7656]  do_syscall_64+0xa4/0xf80
[  222.167718][ T7656]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.167741][ T7656] RIP: 0033:0x7fcdcc79c14a
[  222.167756][ T7656] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.167777][ T7656] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.167797][ T7656] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  222.167811][ T7656] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  222.167825][ T7656] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  222.167839][ T7656] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.167852][ T7656] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  222.167869][ T7656]  </TASK>
[  222.167880][ T7656] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  222.210288][ T7635] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.213147][ T7656] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.244473][ T7662] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.308464][ T7658] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.314984][ T7662] CPU: 1 UID: 0 PID: 7662 Comm: syz.1.166 Not tainted syzkaller #0 PREEMPT(full) 
[  222.315014][ T7662] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.315027][ T7662] Call Trace:
[  222.315034][ T7662]  <TASK>
[  222.315042][ T7662]  dump_stack_lvl+0x97/0xe0
[  222.315072][ T7662]  sysfs_warn_dup.cold+0x1c/0x28
[  222.315106][ T7662]  sysfs_create_dir_ns+0x129/0x140
[  222.315136][ T7662]  kobject_add_internal+0x104/0x310
[  222.315164][ T7662]  kobject_init_and_add+0xb2/0xf0
[  222.315200][ T7662]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.315229][ T7662]  gfs2_sys_fs_add+0xef/0x200
[  222.315262][ T7662]  gfs2_fill_super+0x896/0x1240
[  222.315283][ T7662]  ? sb_set_blocksize+0x8c/0x150
[  222.315310][ T7662]  ? setup_bdev_super+0x19d/0x330
[  222.315334][ T7662]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.315370][ T7662]  get_tree_bdev_flags+0x1c0/0x290
[  222.315399][ T7662]  gfs2_get_tree+0x26/0xd0
[  222.315432][ T7662]  vfs_get_tree+0x30/0x120
[  222.315453][ T7662]  path_mount+0x5a9/0x1350
[  222.315487][ T7662]  ? putname+0x78/0xe0
[  222.315520][ T7662]  __x64_sys_mount+0x1a3/0x1e0
[  222.315554][ T7662]  do_syscall_64+0xa4/0xf80
[  222.315589][ T7662]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.315614][ T7662] RIP: 0033:0x7fd53b19c14a
[  222.315631][ T7662] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.315652][ T7662] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.315673][ T7662] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  222.315689][ T7662] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  222.315704][ T7662] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  222.315719][ T7662] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.315733][ T7662] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  222.315751][ T7662]  </TASK>
[  222.315761][ T7662] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  222.436523][ T7658] CPU: 0 UID: 0 PID: 7658 Comm: syz.6.164 Not tainted syzkaller #0 PREEMPT(full) 
[  222.436551][ T7658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.436565][ T7658] Call Trace:
[  222.436571][ T7658]  <TASK>
[  222.436577][ T7658]  dump_stack_lvl+0x97/0xe0
[  222.436606][ T7658]  sysfs_warn_dup.cold+0x1c/0x28
[  222.436640][ T7658]  sysfs_create_dir_ns+0x129/0x140
[  222.436668][ T7658]  kobject_add_internal+0x104/0x310
[  222.436695][ T7658]  kobject_init_and_add+0xb2/0xf0
[  222.436723][ T7658]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.436745][ T7658]  gfs2_sys_fs_add+0xef/0x200
[  222.436763][ T7658]  gfs2_fill_super+0x896/0x1240
[  222.436806][ T7658]  ? sb_set_blocksize+0x8c/0x150
[  222.436831][ T7658]  ? setup_bdev_super+0x19d/0x330
[  222.436909][ T7658]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.436949][ T7658]  get_tree_bdev_flags+0x1c0/0x290
[  222.436978][ T7658]  gfs2_get_tree+0x26/0xd0
[  222.437011][ T7658]  vfs_get_tree+0x30/0x120
[  222.437032][ T7658]  path_mount+0x5a9/0x1350
[  222.437077][ T7658]  ? putname+0x78/0xe0
[  222.437109][ T7658]  __x64_sys_mount+0x1a3/0x1e0
[  222.437141][ T7658]  do_syscall_64+0xa4/0xf80
[  222.437176][ T7658]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.437199][ T7658] RIP: 0033:0x7f533af9c14a
[  222.437215][ T7658] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.437236][ T7658] RSP: 002b:00007f533bda5e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.437268][ T7658] RAX: ffffffffffffffda RBX: 00007f533bda5ee0 RCX: 00007f533af9c14a
[  222.437283][ T7658] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f533bda5ea0
[  222.437298][ T7658] RBP: 00002000000124c0 R08: 00007f533bda5ee0 R09: 0000000000000000
[  222.437312][ T7658] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.437325][ T7658] R13: 00007f533bda5ea0 R14: 0000000000012588 R15: 0000200000000000
[  222.437343][ T7658]  </TASK>
[  222.438887][ T7658] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  222.443932][ T7662] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.455367][ T7664] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.464488][ T7658] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.467587][ T7664] CPU: 0 UID: 0 PID: 7664 Comm: syz.3.167 Not tainted syzkaller #0 PREEMPT(full) 
[  222.467616][ T7664] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.467628][ T7664] Call Trace:
[  222.467635][ T7664]  <TASK>
[  222.467643][ T7664]  dump_stack_lvl+0x97/0xe0
[  222.467675][ T7664]  sysfs_warn_dup.cold+0x1c/0x28
[  222.467708][ T7664]  sysfs_create_dir_ns+0x129/0x140
[  222.467735][ T7664]  kobject_add_internal+0x104/0x310
[  222.467763][ T7664]  kobject_init_and_add+0xb2/0xf0
[  222.467789][ T7664]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.467818][ T7664]  gfs2_sys_fs_add+0xef/0x200
[  222.467856][ T7664]  gfs2_fill_super+0x896/0x1240
[  222.467876][ T7664]  ? sb_set_blocksize+0x8c/0x150
[  222.467903][ T7664]  ? setup_bdev_super+0x19d/0x330
[  222.467925][ T7664]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.467961][ T7664]  get_tree_bdev_flags+0x1c0/0x290
[  222.467988][ T7664]  gfs2_get_tree+0x26/0xd0
[  222.468020][ T7664]  vfs_get_tree+0x30/0x120
[  222.468040][ T7664]  path_mount+0x5a9/0x1350
[  222.468072][ T7664]  ? putname+0x78/0xe0
[  222.468103][ T7664]  __x64_sys_mount+0x1a3/0x1e0
[  222.468135][ T7664]  do_syscall_64+0xa4/0xf80
[  222.468169][ T7664]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.468193][ T7664] RIP: 0033:0x7f174c79c14a
[  222.468209][ T7664] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.468234][ T7664] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.468254][ T7664] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  222.468272][ T7664] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  222.468285][ T7664] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  222.468298][ T7664] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.468311][ T7664] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  222.468328][ T7664]  </TASK>
[  222.468340][ T7664] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  222.527250][ T7660] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.587273][ T7664] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.588343][ T7660] CPU: 1 UID: 0 PID: 7660 Comm: syz.5.165 Not tainted syzkaller #0 PREEMPT(full) 
[  222.588370][ T7660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.588383][ T7660] Call Trace:
[  222.588389][ T7660]  <TASK>
[  222.588396][ T7660]  dump_stack_lvl+0x97/0xe0
[  222.588423][ T7660]  sysfs_warn_dup.cold+0x1c/0x28
[  222.588456][ T7660]  sysfs_create_dir_ns+0x129/0x140
[  222.588484][ T7660]  kobject_add_internal+0x104/0x310
[  222.588511][ T7660]  kobject_init_and_add+0xb2/0xf0
[  222.588537][ T7660]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.588566][ T7660]  gfs2_sys_fs_add+0xef/0x200
[  222.588597][ T7660]  gfs2_fill_super+0x896/0x1240
[  222.588617][ T7660]  ? sb_set_blocksize+0x8c/0x150
[  222.588642][ T7660]  ? setup_bdev_super+0x19d/0x330
[  222.588664][ T7660]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.588699][ T7660]  get_tree_bdev_flags+0x1c0/0x290
[  222.588726][ T7660]  gfs2_get_tree+0x26/0xd0
[  222.588758][ T7660]  vfs_get_tree+0x30/0x120
[  222.588778][ T7660]  path_mount+0x5a9/0x1350
[  222.588811][ T7660]  ? putname+0x78/0xe0
[  222.588842][ T7660]  __x64_sys_mount+0x1a3/0x1e0
[  222.588874][ T7660]  do_syscall_64+0xa4/0xf80
[  222.588915][ T7660]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.588937][ T7660] RIP: 0033:0x7fac29d9c14a
[  222.588953][ T7660] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.588973][ T7660] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.588993][ T7660] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  222.589008][ T7660] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  222.589022][ T7660] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  222.589036][ T7660] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.589049][ T7660] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  222.589066][ T7660]  </TASK>
[  222.589076][ T7660] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  222.867397][ T7676] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  222.872798][ T7660] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  222.882384][ T7676] CPU: 0 UID: 0 PID: 7676 Comm: syz.2.168 Not tainted syzkaller #0 PREEMPT(full) 
[  222.882413][ T7676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  222.882426][ T7676] Call Trace:
[  222.882432][ T7676]  <TASK>
[  222.882438][ T7676]  dump_stack_lvl+0x97/0xe0
[  222.882466][ T7676]  sysfs_warn_dup.cold+0x1c/0x28
[  222.882499][ T7676]  sysfs_create_dir_ns+0x129/0x140
[  222.882527][ T7676]  kobject_add_internal+0x104/0x310
[  222.882555][ T7676]  kobject_init_and_add+0xb2/0xf0
[  222.882582][ T7676]  ? alloc_workqueue_noprof+0xe0/0xb60
[  222.882611][ T7676]  gfs2_sys_fs_add+0xef/0x200
[  222.882642][ T7676]  gfs2_fill_super+0x896/0x1240
[  222.882663][ T7676]  ? sb_set_blocksize+0x8c/0x150
[  222.882688][ T7676]  ? setup_bdev_super+0x19d/0x330
[  222.882711][ T7676]  ? __pfx_gfs2_fill_super+0x10/0x10
[  222.882747][ T7676]  get_tree_bdev_flags+0x1c0/0x290
[  222.882774][ T7676]  gfs2_get_tree+0x26/0xd0
[  222.882807][ T7676]  vfs_get_tree+0x30/0x120
[  222.882827][ T7676]  path_mount+0x5a9/0x1350
[  222.882860][ T7676]  ? putname+0x78/0xe0
[  222.883007][ T7676]  __x64_sys_mount+0x1a3/0x1e0
[  222.883045][ T7676]  do_syscall_64+0xa4/0xf80
[  222.883088][ T7676]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  222.883117][ T7676] RIP: 0033:0x7fdf1779c14a
[  222.883133][ T7676] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  222.883158][ T7676] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  222.883178][ T7676] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  222.883193][ T7676] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  222.883207][ T7676] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  222.883221][ T7676] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  222.883234][ T7676] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  222.883252][ T7676]  </TASK>
[  222.883266][ T7676] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  224.059340][ T7676] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  227.218167][ T5943] gfs2: fsid=syz:syz.0: file system withdrawn
[  227.305535][ T7682] set_capacity_and_notify: 3 callbacks suppressed
[  227.305546][ T7682] loop0: detected capacity change from 0 to 32768
[  227.323419][ T7682] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  227.332786][ T7682] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  227.344455][ T7682] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  227.352624][ T5936] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  227.359627][ T5936] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  227.370116][ T5936] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 10ms
[  227.377634][ T5936] gfs2: fsid=syz:syz.0: jid=0: Done
[  227.382943][ T7682] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  227.409253][ T7682] gfs2: fsid=syz:syz.0: found 1 quota changes
[  227.418550][ T6448] syz-executor: attempt to access beyond end of device
[  227.418550][ T6448] loop0: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  227.433955][ T6448] Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
[  227.443273][ T6448] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  227.456494][ T6448] CPU: 1 UID: 0 PID: 6448 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  227.456511][ T6448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  227.456519][ T6448] Call Trace:
[  227.456523][ T6448]  <TASK>
[  227.456528][ T6448]  dump_stack_lvl+0x97/0xe0
[  227.456546][ T6448]  gfs2_withdraw.cold+0xa/0x77
[  227.456558][ T6448]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  227.456570][ T6448]  gfs2_ail1_flush+0x497/0x7e0
[  227.456593][ T6448]  gfs2_ail1_start+0x4f/0x80
[  227.456615][ T6448]  gfs2_log_flush+0xf9a/0x1170
[  227.456628][ T6448]  gfs2_kill_sb+0x3e/0x1e0
[  227.456647][ T6448]  deactivate_locked_super+0x4f/0x120
[  227.456662][ T6448]  deactivate_super+0xa4/0xc0
[  227.456676][ T6448]  cleanup_mnt+0x145/0x1f0
[  227.456691][ T6448]  task_work_run+0x95/0xf0
[  227.456710][ T6448]  exit_to_user_mode_loop+0xcf/0x440
[  227.456726][ T6448]  do_syscall_64+0x2b8/0xf80
[  227.456747][ T6448]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  227.456760][ T6448] RIP: 0033:0x7f6e1879c117
[  227.456771][ T6448] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  227.456783][ T6448] RSP: 002b:00007ffe33dda558 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  227.456795][ T6448] RAX: 0000000000000000 RBX: 00007f6e1880471f RCX: 00007f6e1879c117
[  227.456803][ T6448] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe33dda610
[  227.456810][ T6448] RBP: 00007ffe33dda610 R08: 00007ffe33ddb610 R09: 00000000ffffffff
[  227.456818][ T6448] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe33ddb6a0
[  227.456826][ T6448] R13: 00007f6e1880471f R14: 0000000000037792 R15: 00007ffe33ddb6e0
[  227.456835][ T6448]  </TASK>
[  227.456839][ T6448] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  232.658186][ T5936] gfs2: fsid=syz:syz.0: file system withdrawn
2026/01/30 15:13:29 executed programs: 166
[  235.208415][ T7695] loop6: detected capacity change from 0 to 32768
[  235.244912][ T7698] loop4: detected capacity change from 0 to 32768
[  235.272095][ T7695] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  235.291981][ T7695] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  235.317387][ T7694] loop5: detected capacity change from 0 to 32768
[  235.324842][ T7698] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  235.335752][ T7694] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  235.338923][ T7695] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  235.359917][ T7698] CPU: 0 UID: 0 PID: 7698 Comm: syz.4.173 Not tainted syzkaller #0 PREEMPT(full) 
[  235.359942][ T7698] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  235.359954][ T7698] Call Trace:
[  235.359960][ T7698]  <TASK>
[  235.359966][ T7698]  dump_stack_lvl+0x97/0xe0
[  235.359992][ T7698]  sysfs_warn_dup.cold+0x1c/0x28
[  235.360024][ T7698]  sysfs_create_dir_ns+0x129/0x140
[  235.360053][ T7698]  kobject_add_internal+0x104/0x310
[  235.360078][ T7698]  kobject_init_and_add+0xb2/0xf0
[  235.360102][ T7698]  ? alloc_workqueue_noprof+0xe0/0xb60
[  235.360128][ T7698]  gfs2_sys_fs_add+0xef/0x200
[  235.360157][ T7698]  gfs2_fill_super+0x896/0x1240
[  235.360176][ T7698]  ? sb_set_blocksize+0x8c/0x150
[  235.360199][ T7698]  ? setup_bdev_super+0x19d/0x330
[  235.360220][ T7698]  ? __pfx_gfs2_fill_super+0x10/0x10
[  235.360253][ T7698]  get_tree_bdev_flags+0x1c0/0x290
[  235.360278][ T7698]  gfs2_get_tree+0x26/0xd0
[  235.360308][ T7698]  vfs_get_tree+0x30/0x120
[  235.360327][ T7698]  path_mount+0x5a9/0x1350
[  235.360357][ T7698]  ? putname+0x78/0xe0
[  235.360386][ T7698]  __x64_sys_mount+0x1a3/0x1e0
[  235.360416][ T7698]  do_syscall_64+0xa4/0xf80
[  235.360447][ T7698]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  235.360467][ T7698] RIP: 0033:0x7fcdcc79c14a
[  235.360482][ T7698] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  235.360501][ T7698] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  235.360520][ T7698] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  235.360533][ T7698] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  235.360556][ T7698] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  235.360569][ T7698] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  235.360581][ T7698] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  235.360596][ T7698]  </TASK>
[  235.360604][ T7698] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  235.360605][ T7694] CPU: 1 UID: 0 PID: 7694 Comm: syz.5.174 Not tainted syzkaller #0 PREEMPT(full) 
[  235.360631][ T7694] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  235.360641][ T7694] Call Trace:
[  235.360645][ T7694]  <TASK>
[  235.360651][ T7694]  dump_stack_lvl+0x97/0xe0
[  235.360674][ T7694]  sysfs_warn_dup.cold+0x1c/0x28
[  235.360706][ T7694]  sysfs_create_dir_ns+0x129/0x140
[  235.360733][ T7694]  kobject_add_internal+0x104/0x310
[  235.360760][ T7694]  kobject_init_and_add+0xb2/0xf0
[  235.360786][ T7694]  ? alloc_workqueue_noprof+0xe0/0xb60
[  235.360823][ T7694]  gfs2_sys_fs_add+0xef/0x200
[  235.360854][ T7694]  gfs2_fill_super+0x896/0x1240
[  235.360874][ T7694]  ? sb_set_blocksize+0x8c/0x150
[  235.360899][ T7694]  ? setup_bdev_super+0x19d/0x330
[  235.360922][ T7694]  ? __pfx_gfs2_fill_super+0x10/0x10
[  235.360957][ T7694]  get_tree_bdev_flags+0x1c0/0x290
[  235.360985][ T7694]  gfs2_get_tree+0x26/0xd0
[  235.361018][ T7694]  vfs_get_tree+0x30/0x120
[  235.361042][ T7694]  path_mount+0x5a9/0x1350
[  235.361075][ T7694]  ? putname+0x78/0xe0
[  235.361106][ T7694]  __x64_sys_mount+0x1a3/0x1e0
[  235.361139][ T7694]  do_syscall_64+0xa4/0xf80
[  235.361173][ T7694]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  235.361196][ T7694] RIP: 0033:0x7fac29d9c14a
[  235.361211][ T7694] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  235.361232][ T7694] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  235.361251][ T7694] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  235.361265][ T7694] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  235.361279][ T7694] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  235.361293][ T7694] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  235.361307][ T7694] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  235.361324][ T7694]  </TASK>
[  235.361423][ T7694] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  235.394626][ T5924] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  235.399318][ T7694] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  235.403804][ T7693] loop1: detected capacity change from 0 to 32768
[  235.424472][ T7700] loop0: detected capacity change from 0 to 32768
[  235.427676][ T5924] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  235.433082][ T7702] loop2: detected capacity change from 0 to 32768
[  235.443754][ T5924] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 16ms
[  235.457134][ T7698] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  235.491854][ T7699] loop3: detected capacity change from 0 to 32768
[  235.562241][ T7693] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  235.574577][ T5924] gfs2: fsid=syz:syz.0: jid=0: Done
[  235.671179][ T7693] CPU: 1 UID: 0 PID: 7693 Comm: syz.1.170 Not tainted syzkaller #0 PREEMPT(full) 
[  235.671208][ T7693] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  235.671221][ T7693] Call Trace:
[  235.671230][ T7693]  <TASK>
[  235.671237][ T7693]  dump_stack_lvl+0x97/0xe0
[  235.671265][ T7693]  sysfs_warn_dup.cold+0x1c/0x28
[  235.671298][ T7693]  sysfs_create_dir_ns+0x129/0x140
[  235.671327][ T7693]  kobject_add_internal+0x104/0x310
[  235.671354][ T7693]  kobject_init_and_add+0xb2/0xf0
[  235.671382][ T7693]  ? alloc_workqueue_noprof+0xe0/0xb60
[  235.671410][ T7693]  gfs2_sys_fs_add+0xef/0x200
[  235.671441][ T7693]  gfs2_fill_super+0x896/0x1240
[  235.671462][ T7693]  ? sb_set_blocksize+0x8c/0x150
[  235.671487][ T7693]  ? setup_bdev_super+0x19d/0x330
[  235.671510][ T7693]  ? __pfx_gfs2_fill_super+0x10/0x10
[  235.671545][ T7693]  get_tree_bdev_flags+0x1c0/0x290
[  235.671573][ T7693]  gfs2_get_tree+0x26/0xd0
[  235.671605][ T7693]  vfs_get_tree+0x30/0x120
[  235.671626][ T7693]  path_mount+0x5a9/0x1350
[  235.671659][ T7693]  ? putname+0x78/0xe0
[  235.671690][ T7693]  __x64_sys_mount+0x1a3/0x1e0
[  235.671724][ T7693]  do_syscall_64+0xa4/0xf80
[  235.671758][ T7693]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  235.671787][ T7693] RIP: 0033:0x7fd53b19c14a
[  235.671804][ T7693] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  235.671825][ T7693] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  235.671845][ T7693] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  235.671860][ T7693] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  235.671874][ T7693] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  235.671888][ T7693] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  235.671901][ T7693] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  235.671919][ T7693]  </TASK>
[  235.671973][ T7693] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  235.672730][ T7695] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  235.676680][ T7693] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  235.685808][ T7702] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  235.921656][ T7720] loop5: detected capacity change from 0 to 32768
[  236.046551][ T7722] loop4: detected capacity change from 0 to 32768
[  236.050223][ T7702] CPU: 1 UID: 0 PID: 7702 Comm: syz.2.171 Not tainted syzkaller #0 PREEMPT(full) 
[  236.050252][ T7702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  236.050265][ T7702] Call Trace:
[  236.050272][ T7702]  <TASK>
[  236.050279][ T7702]  dump_stack_lvl+0x97/0xe0
[  236.050308][ T7702]  sysfs_warn_dup.cold+0x1c/0x28
[  236.050342][ T7702]  sysfs_create_dir_ns+0x129/0x140
[  236.050370][ T7702]  kobject_add_internal+0x104/0x310
[  236.050398][ T7702]  kobject_init_and_add+0xb2/0xf0
[  236.050425][ T7702]  ? alloc_workqueue_noprof+0xe0/0xb60
[  236.050454][ T7702]  gfs2_sys_fs_add+0xef/0x200
[  236.050486][ T7702]  gfs2_fill_super+0x896/0x1240
[  236.050507][ T7702]  ? sb_set_blocksize+0x8c/0x150
[  236.050532][ T7702]  ? setup_bdev_super+0x19d/0x330
[  236.050555][ T7702]  ? __pfx_gfs2_fill_super+0x10/0x10
[  236.050590][ T7702]  get_tree_bdev_flags+0x1c0/0x290
[  236.050618][ T7702]  gfs2_get_tree+0x26/0xd0
[  236.050651][ T7702]  vfs_get_tree+0x30/0x120
[  236.050672][ T7702]  path_mount+0x5a9/0x1350
[  236.050712][ T7702]  ? putname+0x78/0xe0
[  236.050744][ T7702]  __x64_sys_mount+0x1a3/0x1e0
[  236.050777][ T7702]  do_syscall_64+0xa4/0xf80
[  236.050812][ T7702]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  236.050835][ T7702] RIP: 0033:0x7fdf1779c14a
[  236.050851][ T7702] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  236.050872][ T7702] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  236.050891][ T7702] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  236.050906][ T7702] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  236.050920][ T7702] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  236.050934][ T7702] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  236.050948][ T7702] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  236.050965][ T7702]  </TASK>
[  236.050974][ T7702] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  236.051929][ T7700] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  236.068220][ T7702] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  236.077874][ T7699] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  236.088130][ T7700] CPU: 1 UID: 0 PID: 7700 Comm: syz.0.169 Not tainted syzkaller #0 PREEMPT(full) 
[  236.088159][ T7700] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  236.088173][ T7700] Call Trace:
[  236.088179][ T7700]  <TASK>
[  236.088186][ T7700]  dump_stack_lvl+0x97/0xe0
[  236.088214][ T7700]  sysfs_warn_dup.cold+0x1c/0x28
[  236.088247][ T7700]  sysfs_create_dir_ns+0x129/0x140
[  236.088276][ T7700]  kobject_add_internal+0x104/0x310
[  236.088303][ T7700]  kobject_init_and_add+0xb2/0xf0
[  236.088330][ T7700]  ? alloc_workqueue_noprof+0xe0/0xb60
[  236.088360][ T7700]  gfs2_sys_fs_add+0xef/0x200
[  236.088391][ T7700]  gfs2_fill_super+0x896/0x1240
[  236.088412][ T7700]  ? sb_set_blocksize+0x8c/0x150
[  236.088437][ T7700]  ? setup_bdev_super+0x19d/0x330
[  236.088460][ T7700]  ? __pfx_gfs2_fill_super+0x10/0x10
[  236.088494][ T7700]  get_tree_bdev_flags+0x1c0/0x290
[  236.088522][ T7700]  gfs2_get_tree+0x26/0xd0
[  236.088555][ T7700]  vfs_get_tree+0x30/0x120
[  236.088576][ T7700]  path_mount+0x5a9/0x1350
[  236.088609][ T7700]  ? putname+0x78/0xe0
[  236.088641][ T7700]  __x64_sys_mount+0x1a3/0x1e0
[  236.088674][ T7700]  do_syscall_64+0xa4/0xf80
[  236.088709][ T7700]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  236.088738][ T7700] RIP: 0033:0x7f6e1879c14a
[  236.088754][ T7700] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  236.088775][ T7700] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  236.088795][ T7700] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  236.088810][ T7700] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  236.088824][ T7700] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  236.088838][ T7700] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  236.088852][ T7700] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  236.088869][ T7700]  </TASK>
[  236.088880][ T7700] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  236.107814][ T7720] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  236.145124][ T7699] CPU: 1 UID: 0 PID: 7699 Comm: syz.3.172 Not tainted syzkaller #0 PREEMPT(full) 
[  236.145153][ T7699] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  236.145166][ T7699] Call Trace:
[  236.145173][ T7699]  <TASK>
[  236.145180][ T7699]  dump_stack_lvl+0x97/0xe0
[  236.145208][ T7699]  sysfs_warn_dup.cold+0x1c/0x28
[  236.145242][ T7699]  sysfs_create_dir_ns+0x129/0x140
[  236.145270][ T7699]  kobject_add_internal+0x104/0x310
[  236.145298][ T7699]  kobject_init_and_add+0xb2/0xf0
[  236.145326][ T7699]  ? alloc_workqueue_noprof+0xe0/0xb60
[  236.145355][ T7699]  gfs2_sys_fs_add+0xef/0x200
[  236.145387][ T7699]  gfs2_fill_super+0x896/0x1240
[  236.145408][ T7699]  ? sb_set_blocksize+0x8c/0x150
[  236.145434][ T7699]  ? setup_bdev_super+0x19d/0x330
[  236.145457][ T7699]  ? __pfx_gfs2_fill_super+0x10/0x10
[  236.145492][ T7699]  get_tree_bdev_flags+0x1c0/0x290
[  236.145520][ T7699]  gfs2_get_tree+0x26/0xd0
[  236.145553][ T7699]  vfs_get_tree+0x30/0x120
[  236.145574][ T7699]  path_mount+0x5a9/0x1350
[  236.145607][ T7699]  ? putname+0x78/0xe0
[  236.145639][ T7699]  __x64_sys_mount+0x1a3/0x1e0
[  236.145672][ T7699]  do_syscall_64+0xa4/0xf80
[  236.145707][ T7699]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  236.145730][ T7699] RIP: 0033:0x7f174c79c14a
[  236.145746][ T7699] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  236.145767][ T7699] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  236.145792][ T7699] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  236.145807][ T7699] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  236.145821][ T7699] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  236.145835][ T7699] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  236.145848][ T7699] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  236.145865][ T7699]  </TASK>
[  236.145876][ T7699] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  236.157162][ T7700] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  236.162532][ T7720] CPU: 1 UID: 0 PID: 7720 Comm: syz.5.176 Not tainted syzkaller #0 PREEMPT(full) 
[  236.162560][ T7720] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  236.162573][ T7720] Call Trace:
[  236.162579][ T7720]  <TASK>
[  236.162586][ T7720]  dump_stack_lvl+0x97/0xe0
[  236.162614][ T7720]  sysfs_warn_dup.cold+0x1c/0x28
[  236.162647][ T7720]  sysfs_create_dir_ns+0x129/0x140
[  236.162676][ T7720]  kobject_add_internal+0x104/0x310
[  236.162702][ T7720]  kobject_init_and_add+0xb2/0xf0
[  236.162730][ T7720]  ? alloc_workqueue_noprof+0xe0/0xb60
[  236.162759][ T7720]  gfs2_sys_fs_add+0xef/0x200
[  236.162798][ T7720]  gfs2_fill_super+0x896/0x1240
[  236.162819][ T7720]  ? sb_set_blocksize+0x8c/0x150
[  236.162845][ T7720]  ? setup_bdev_super+0x19d/0x330
[  236.162869][ T7720]  ? __pfx_gfs2_fill_super+0x10/0x10
[  236.162903][ T7720]  get_tree_bdev_flags+0x1c0/0x290
[  236.162931][ T7720]  gfs2_get_tree+0x26/0xd0
[  236.162965][ T7720]  vfs_get_tree+0x30/0x120
[  236.162985][ T7720]  path_mount+0x5a9/0x1350
[  236.163018][ T7720]  ? putname+0x78/0xe0
[  236.163050][ T7720]  __x64_sys_mount+0x1a3/0x1e0
[  236.163083][ T7720]  do_syscall_64+0xa4/0xf80
[  236.163117][ T7720]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  236.163140][ T7720] RIP: 0033:0x7fac29d9c14a
[  236.163156][ T7720] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  236.163176][ T7720] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  236.163196][ T7720] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  236.163211][ T7720] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  236.163225][ T7720] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  236.163239][ T7720] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  236.163252][ T7720] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  236.163269][ T7720]  </TASK>
[  236.163280][ T7720] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  236.188949][ T7699] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  236.214498][ T7720] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  236.225098][ T7695] gfs2: fsid=syz:syz.0: found 1 quota changes
[  236.245109][ T7722] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  236.694649][ T7732] loop5: detected capacity change from 0 to 32768
[  237.014889][ T7734] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  237.015404][ T6478] syz-executor: attempt to access beyond end of device
[  237.015404][ T6478] loop6: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  237.033995][ T7734] CPU: 1 UID: 0 PID: 7734 Comm: syz.3.180 Not tainted syzkaller #0 PREEMPT(full) 
[  237.034025][ T7734] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.034038][ T7734] Call Trace:
[  237.034044][ T7734]  <TASK>
[  237.034051][ T7734]  dump_stack_lvl+0x97/0xe0
[  237.034079][ T7734]  sysfs_warn_dup.cold+0x1c/0x28
[  237.034113][ T7734]  sysfs_create_dir_ns+0x129/0x140
[  237.034141][ T7734]  kobject_add_internal+0x104/0x310
[  237.034169][ T7734]  kobject_init_and_add+0xb2/0xf0
[  237.034199][ T7734]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.034228][ T7734]  gfs2_sys_fs_add+0xef/0x200
[  237.034260][ T7734]  gfs2_fill_super+0x896/0x1240
[  237.034281][ T7734]  ? sb_set_blocksize+0x8c/0x150
[  237.034307][ T7734]  ? setup_bdev_super+0x19d/0x330
[  237.034330][ T7734]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.034365][ T7734]  get_tree_bdev_flags+0x1c0/0x290
[  237.034393][ T7734]  gfs2_get_tree+0x26/0xd0
[  237.034425][ T7734]  vfs_get_tree+0x30/0x120
[  237.034445][ T7734]  path_mount+0x5a9/0x1350
[  237.034478][ T7734]  ? putname+0x78/0xe0
[  237.034509][ T7734]  __x64_sys_mount+0x1a3/0x1e0
[  237.034543][ T7734]  do_syscall_64+0xa4/0xf80
[  237.034578][ T7734]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.034600][ T7734] RIP: 0033:0x7f174c79c14a
[  237.034622][ T7734] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.034643][ T7734] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.034663][ T7734] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  237.034678][ T7734] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  237.034692][ T7734] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  237.034706][ T7734] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.034719][ T7734] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  237.034737][ T7734]  </TASK>
[  237.034781][ T7734] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.039732][ T7722] CPU: 0 UID: 0 PID: 7722 Comm: syz.4.177 Not tainted syzkaller #0 PREEMPT(full) 
[  237.039760][ T7722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.039773][ T7722] Call Trace:
[  237.039780][ T7722]  <TASK>
[  237.039788][ T7722]  dump_stack_lvl+0x97/0xe0
[  237.039815][ T7722]  sysfs_warn_dup.cold+0x1c/0x28
[  237.039848][ T7722]  sysfs_create_dir_ns+0x129/0x140
[  237.039876][ T7722]  kobject_add_internal+0x104/0x310
[  237.039903][ T7722]  kobject_init_and_add+0xb2/0xf0
[  237.039931][ T7722]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.039960][ T7722]  gfs2_sys_fs_add+0xef/0x200
[  237.039991][ T7722]  gfs2_fill_super+0x896/0x1240
[  237.040012][ T7722]  ? sb_set_blocksize+0x8c/0x150
[  237.040037][ T7722]  ? setup_bdev_super+0x19d/0x330
[  237.040059][ T7722]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.040094][ T7722]  get_tree_bdev_flags+0x1c0/0x290
[  237.040122][ T7722]  gfs2_get_tree+0x26/0xd0
[  237.040154][ T7722]  vfs_get_tree+0x30/0x120
[  237.040175][ T7722]  path_mount+0x5a9/0x1350
[  237.040207][ T7722]  ? putname+0x78/0xe0
[  237.040237][ T7722]  __x64_sys_mount+0x1a3/0x1e0
[  237.040270][ T7722]  do_syscall_64+0xa4/0xf80
[  237.040304][ T7722]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.040326][ T7722] RIP: 0033:0x7fcdcc79c14a
[  237.040343][ T7722] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.040364][ T7722] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.040383][ T7722] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  237.040398][ T7722] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  237.040419][ T7722] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  237.040432][ T7722] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.040446][ T7722] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  237.040462][ T7722]  </TASK>
[  237.040474][ T7722] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.067126][ T6478] Buffer I/O error on dev loop6, logical block 8589934885, lost async page write
[  237.077549][ T7734] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  237.083179][ T6478] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  237.156794][ T7722] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  237.161628][ T6478] CPU: 1 UID: 0 PID: 6478 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  237.161656][ T6478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.161668][ T6478] Call Trace:
[  237.161674][ T6478]  <TASK>
[  237.161681][ T6478]  dump_stack_lvl+0x97/0xe0
[  237.161709][ T6478]  gfs2_withdraw.cold+0xa/0x77
[  237.161730][ T6478]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  237.161752][ T6478]  gfs2_ail1_flush+0x497/0x7e0
[  237.161790][ T6478]  gfs2_ail1_start+0x4f/0x80
[  237.161828][ T6478]  gfs2_log_flush+0xf9a/0x1170
[  237.161851][ T6478]  gfs2_kill_sb+0x3e/0x1e0
[  237.161883][ T6478]  deactivate_locked_super+0x4f/0x120
[  237.161909][ T6478]  deactivate_super+0xa4/0xc0
[  237.161933][ T6478]  cleanup_mnt+0x145/0x1f0
[  237.161960][ T6478]  task_work_run+0x95/0xf0
[  237.161991][ T6478]  exit_to_user_mode_loop+0xcf/0x440
[  237.162019][ T6478]  do_syscall_64+0x2b8/0xf80
[  237.162054][ T6478]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.162077][ T6478] RIP: 0033:0x7f533af9c117
[  237.162093][ T6478] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  237.162114][ T6478] RSP: 002b:00007ffd17212568 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  237.162134][ T6478] RAX: 0000000000000000 RBX: 00007f533b00471f RCX: 00007f533af9c117
[  237.162148][ T6478] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd17212620
[  237.162162][ T6478] RBP: 00007ffd17212620 R08: 00007ffd17213620 R09: 00000000ffffffff
[  237.162176][ T6478] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd172136b0
[  237.162190][ T6478] R13: 00007f533b00471f R14: 00000000000395bb R15: 00007ffd172136f0
[  237.162206][ T6478]  </TASK>
[  237.162213][ T6478] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  237.277215][ T7730] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  237.297495][ T7732] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  237.299727][ T7730] CPU: 0 UID: 0 PID: 7730 Comm: syz.1.178 Not tainted syzkaller #0 PREEMPT(full) 
[  237.299755][ T7730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.299768][ T7730] Call Trace:
[  237.299774][ T7730]  <TASK>
[  237.299781][ T7730]  dump_stack_lvl+0x97/0xe0
[  237.299815][ T7730]  sysfs_warn_dup.cold+0x1c/0x28
[  237.299848][ T7730]  sysfs_create_dir_ns+0x129/0x140
[  237.299876][ T7730]  kobject_add_internal+0x104/0x310
[  237.299904][ T7730]  kobject_init_and_add+0xb2/0xf0
[  237.299931][ T7730]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.299960][ T7730]  gfs2_sys_fs_add+0xef/0x200
[  237.299991][ T7730]  gfs2_fill_super+0x896/0x1240
[  237.300011][ T7730]  ? sb_set_blocksize+0x8c/0x150
[  237.300036][ T7730]  ? setup_bdev_super+0x19d/0x330
[  237.300059][ T7730]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.300094][ T7730]  get_tree_bdev_flags+0x1c0/0x290
[  237.300122][ T7730]  gfs2_get_tree+0x26/0xd0
[  237.300154][ T7730]  vfs_get_tree+0x30/0x120
[  237.300175][ T7730]  path_mount+0x5a9/0x1350
[  237.300208][ T7730]  ? putname+0x78/0xe0
[  237.300239][ T7730]  __x64_sys_mount+0x1a3/0x1e0
[  237.300272][ T7730]  do_syscall_64+0xa4/0xf80
[  237.300306][ T7730]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.300329][ T7730] RIP: 0033:0x7fd53b19c14a
[  237.300345][ T7730] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.300367][ T7730] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.300387][ T7730] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  237.300402][ T7730] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  237.300416][ T7730] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  237.300430][ T7730] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.300443][ T7730] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  237.300460][ T7730]  </TASK>
[  237.300512][ T7730] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.304621][ T7732] CPU: 1 UID: 0 PID: 7732 Comm: syz.5.179 Not tainted syzkaller #0 PREEMPT(full) 
[  237.304648][ T7732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.304660][ T7732] Call Trace:
[  237.304666][ T7732]  <TASK>
[  237.304672][ T7732]  dump_stack_lvl+0x97/0xe0
[  237.304697][ T7732]  sysfs_warn_dup.cold+0x1c/0x28
[  237.304729][ T7732]  sysfs_create_dir_ns+0x129/0x140
[  237.304756][ T7732]  kobject_add_internal+0x104/0x310
[  237.304782][ T7732]  kobject_init_and_add+0xb2/0xf0
[  237.304810][ T7732]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.304837][ T7732]  gfs2_sys_fs_add+0xef/0x200
[  237.304868][ T7732]  gfs2_fill_super+0x896/0x1240
[  237.304888][ T7732]  ? sb_set_blocksize+0x8c/0x150
[  237.304913][ T7732]  ? setup_bdev_super+0x19d/0x330
[  237.304936][ T7732]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.304970][ T7732]  get_tree_bdev_flags+0x1c0/0x290
[  237.304998][ T7732]  gfs2_get_tree+0x26/0xd0
[  237.305030][ T7732]  vfs_get_tree+0x30/0x120
[  237.305050][ T7732]  path_mount+0x5a9/0x1350
[  237.305082][ T7732]  ? putname+0x78/0xe0
[  237.305113][ T7732]  __x64_sys_mount+0x1a3/0x1e0
[  237.305146][ T7732]  do_syscall_64+0xa4/0xf80
[  237.305179][ T7732]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.305201][ T7732] RIP: 0033:0x7fac29d9c14a
[  237.305216][ T7732] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.305237][ T7732] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.305256][ T7732] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  237.305270][ T7732] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  237.305286][ T7732] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  237.305308][ T7732] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.305321][ T7732] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  237.305338][ T7732]  </TASK>
[  237.305348][ T7732] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.309627][ T7730] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  237.315076][ T7732] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  237.320380][ T7736] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  237.368496][ T7738] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  237.372843][ T7736] CPU: 0 UID: 0 PID: 7736 Comm: syz.2.181 Not tainted syzkaller #0 PREEMPT(full) 
[  237.372869][ T7736] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.372882][ T7736] Call Trace:
[  237.372888][ T7736]  <TASK>
[  237.372896][ T7736]  dump_stack_lvl+0x97/0xe0
[  237.372924][ T7736]  sysfs_warn_dup.cold+0x1c/0x28
[  237.372957][ T7736]  sysfs_create_dir_ns+0x129/0x140
[  237.372985][ T7736]  kobject_add_internal+0x104/0x310
[  237.373012][ T7736]  kobject_init_and_add+0xb2/0xf0
[  237.373038][ T7736]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.373066][ T7736]  gfs2_sys_fs_add+0xef/0x200
[  237.373097][ T7736]  gfs2_fill_super+0x896/0x1240
[  237.373117][ T7736]  ? sb_set_blocksize+0x8c/0x150
[  237.373142][ T7736]  ? setup_bdev_super+0x19d/0x330
[  237.373164][ T7736]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.373199][ T7736]  get_tree_bdev_flags+0x1c0/0x290
[  237.373227][ T7736]  gfs2_get_tree+0x26/0xd0
[  237.373259][ T7736]  vfs_get_tree+0x30/0x120
[  237.373280][ T7736]  path_mount+0x5a9/0x1350
[  237.373312][ T7736]  ? putname+0x78/0xe0
[  237.373343][ T7736]  __x64_sys_mount+0x1a3/0x1e0
[  237.373381][ T7736]  do_syscall_64+0xa4/0xf80
[  237.373415][ T7736]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.373438][ T7736] RIP: 0033:0x7fdf1779c14a
[  237.373453][ T7736] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.373475][ T7736] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.373495][ T7736] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  237.373509][ T7736] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  237.373523][ T7736] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  237.373537][ T7736] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.373550][ T7736] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  237.373566][ T7736]  </TASK>
[  237.373577][ T7736] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.457160][ T7738] CPU: 1 UID: 0 PID: 7738 Comm: syz.0.182 Not tainted syzkaller #0 PREEMPT(full) 
[  237.457188][ T7738] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  237.457201][ T7738] Call Trace:
[  237.457207][ T7738]  <TASK>
[  237.457214][ T7738]  dump_stack_lvl+0x97/0xe0
[  237.457248][ T7738]  sysfs_warn_dup.cold+0x1c/0x28
[  237.457288][ T7738]  sysfs_create_dir_ns+0x129/0x140
[  237.457315][ T7738]  kobject_add_internal+0x104/0x310
[  237.457342][ T7738]  kobject_init_and_add+0xb2/0xf0
[  237.457370][ T7738]  ? alloc_workqueue_noprof+0xe0/0xb60
[  237.457398][ T7738]  gfs2_sys_fs_add+0xef/0x200
[  237.457429][ T7738]  gfs2_fill_super+0x896/0x1240
[  237.457450][ T7738]  ? sb_set_blocksize+0x8c/0x150
[  237.457475][ T7738]  ? setup_bdev_super+0x19d/0x330
[  237.457498][ T7738]  ? __pfx_gfs2_fill_super+0x10/0x10
[  237.457531][ T7738]  get_tree_bdev_flags+0x1c0/0x290
[  237.457556][ T7738]  gfs2_get_tree+0x26/0xd0
[  237.457589][ T7738]  vfs_get_tree+0x30/0x120
[  237.457609][ T7738]  path_mount+0x5a9/0x1350
[  237.457641][ T7738]  ? putname+0x78/0xe0
[  237.457673][ T7738]  __x64_sys_mount+0x1a3/0x1e0
[  237.457706][ T7738]  do_syscall_64+0xa4/0xf80
[  237.457740][ T7738]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  237.457762][ T7738] RIP: 0033:0x7f6e1879c14a
[  237.457778][ T7738] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  237.457800][ T7738] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  237.457819][ T7738] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  237.457834][ T7738] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  237.457848][ T7738] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  237.457862][ T7738] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  237.457875][ T7738] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  237.457892][ T7738]  </TASK>
[  237.457902][ T7738] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  237.463817][ T7736] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  237.530482][ T7738] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  242.338113][ T6734] gfs2: fsid=syz:syz.0: file system withdrawn
2026/01/30 15:13:40 executed programs: 180
[  246.240414][ T7756] set_capacity_and_notify: 4 callbacks suppressed
[  246.240429][ T7756] loop5: detected capacity change from 0 to 32768
[  246.266367][ T7764] loop6: detected capacity change from 0 to 32768
[  246.290919][ T7760] loop1: detected capacity change from 0 to 32768
[  246.298391][ T7759] loop0: detected capacity change from 0 to 32768
[  246.304889][ T7758] loop3: detected capacity change from 0 to 32768
[  246.326088][ T7757] loop4: detected capacity change from 0 to 32768
[  246.328140][ T7762] loop2: detected capacity change from 0 to 32768
[  246.339504][ T7756] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  246.346966][ T7756] CPU: 0 UID: 0 PID: 7756 Comm: syz.5.188 Not tainted syzkaller #0 PREEMPT(full) 
[  246.346994][ T7756] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  246.347007][ T7756] Call Trace:
[  246.347014][ T7756]  <TASK>
[  246.347020][ T7756]  dump_stack_lvl+0x97/0xe0
[  246.347052][ T7756]  sysfs_warn_dup.cold+0x1c/0x28
[  246.347086][ T7756]  sysfs_create_dir_ns+0x129/0x140
[  246.347113][ T7756]  kobject_add_internal+0x104/0x310
[  246.347138][ T7756]  kobject_init_and_add+0xb2/0xf0
[  246.347163][ T7756]  ? alloc_workqueue_noprof+0xe0/0xb60
[  246.347188][ T7756]  gfs2_sys_fs_add+0xef/0x200
[  246.347220][ T7756]  gfs2_fill_super+0x896/0x1240
[  246.347238][ T7756]  ? sb_set_blocksize+0x8c/0x150
[  246.347260][ T7756]  ? setup_bdev_super+0x19d/0x330
[  246.347280][ T7756]  ? __pfx_gfs2_fill_super+0x10/0x10
[  246.347317][ T7756]  get_tree_bdev_flags+0x1c0/0x290
[  246.347343][ T7756]  gfs2_get_tree+0x26/0xd0
[  246.347374][ T7756]  vfs_get_tree+0x30/0x120
[  246.347403][ T7756]  path_mount+0x5a9/0x1350
[  246.347436][ T7756]  ? putname+0x78/0xe0
[  246.347468][ T7756]  __x64_sys_mount+0x1a3/0x1e0
[  246.347501][ T7756]  do_syscall_64+0xa4/0xf80
[  246.347536][ T7756]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  246.347559][ T7756] RIP: 0033:0x7fac29d9c14a
[  246.347576][ T7756] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  246.347596][ T7756] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  246.347614][ T7756] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  246.347627][ T7756] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  246.347640][ T7756] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  246.347654][ T7756] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  246.347668][ T7756] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  246.347683][ T7756]  </TASK>
[  246.348710][ T7759] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  246.357633][ T7764] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  246.387192][ T7756] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  246.388347][ T7764] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  246.393413][ T7756] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  246.407181][ T7759] CPU: 0 UID: 0 PID: 7759 Comm: syz.0.183 Not tainted syzkaller #0 PREEMPT(full) 
[  246.407209][ T7759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  246.407222][ T7759] Call Trace:
[  246.407229][ T7759]  <TASK>
[  246.407236][ T7759]  dump_stack_lvl+0x97/0xe0
[  246.407263][ T7759]  sysfs_warn_dup.cold+0x1c/0x28
[  246.407296][ T7759]  sysfs_create_dir_ns+0x129/0x140
[  246.407324][ T7759]  kobject_add_internal+0x104/0x310
[  246.407351][ T7759]  kobject_init_and_add+0xb2/0xf0
[  246.407378][ T7759]  ? alloc_workqueue_noprof+0xe0/0xb60
[  246.407406][ T7759]  gfs2_sys_fs_add+0xef/0x200
[  246.407445][ T7759]  gfs2_fill_super+0x896/0x1240
[  246.407465][ T7759]  ? sb_set_blocksize+0x8c/0x150
[  246.407490][ T7759]  ? setup_bdev_super+0x19d/0x330
[  246.407513][ T7759]  ? __pfx_gfs2_fill_super+0x10/0x10
[  246.407548][ T7759]  get_tree_bdev_flags+0x1c0/0x290
[  246.407575][ T7759]  gfs2_get_tree+0x26/0xd0
[  246.407613][ T7759]  vfs_get_tree+0x30/0x120
[  246.407633][ T7759]  path_mount+0x5a9/0x1350
[  246.407665][ T7759]  ? putname+0x78/0xe0
[  246.407695][ T7759]  __x64_sys_mount+0x1a3/0x1e0
[  246.407728][ T7759]  do_syscall_64+0xa4/0xf80
[  246.407762][ T7759]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  246.407784][ T7759] RIP: 0033:0x7f6e1879c14a
[  246.407800][ T7759] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  246.407821][ T7759] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  246.407841][ T7759] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  246.407855][ T7759] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  246.407869][ T7759] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  246.407883][ T7759] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  246.407896][ T7759] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  246.407913][ T7759]  </TASK>
[  246.407927][ T7759] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  246.418285][ T7758] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  246.433067][ T7764] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  246.476389][ T7757] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  246.491280][ T7758] CPU: 0 UID: 0 PID: 7758 Comm: syz.3.186 Not tainted syzkaller #0 PREEMPT(full) 
[  246.491305][ T7758] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  246.491318][ T7758] Call Trace:
[  246.491327][ T7758]  <TASK>
[  246.491334][ T7758]  dump_stack_lvl+0x97/0xe0
[  246.491363][ T7758]  sysfs_warn_dup.cold+0x1c/0x28
[  246.491396][ T7758]  sysfs_create_dir_ns+0x129/0x140
[  246.491425][ T7758]  kobject_add_internal+0x104/0x310
[  246.491452][ T7758]  kobject_init_and_add+0xb2/0xf0
[  246.491480][ T7758]  ? alloc_workqueue_noprof+0xe0/0xb60
[  246.491508][ T7758]  gfs2_sys_fs_add+0xef/0x200
[  246.491540][ T7758]  gfs2_fill_super+0x896/0x1240
[  246.491558][ T7758]  ? sb_set_blocksize+0x8c/0x150
[  246.491583][ T7758]  ? setup_bdev_super+0x19d/0x330
[  246.491606][ T7758]  ? __pfx_gfs2_fill_super+0x10/0x10
[  246.491641][ T7758]  get_tree_bdev_flags+0x1c0/0x290
[  246.491669][ T7758]  gfs2_get_tree+0x26/0xd0
[  246.491702][ T7758]  vfs_get_tree+0x30/0x120
[  246.491730][ T7758]  path_mount+0x5a9/0x1350
[  246.491763][ T7758]  ? putname+0x78/0xe0
[  246.491806][ T7758]  __x64_sys_mount+0x1a3/0x1e0
[  246.491840][ T7758]  do_syscall_64+0xa4/0xf80
[  246.491874][ T7758]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  246.491897][ T7758] RIP: 0033:0x7f174c79c14a
[  246.491913][ T7758] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  246.491934][ T7758] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  246.491954][ T7758] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  246.491969][ T7758] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  246.491983][ T7758] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  246.491997][ T7758] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  246.492011][ T7758] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  246.492028][ T7758]  </TASK>
[  246.492043][ T7758] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  246.514726][ T6734] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  246.516044][ T7757] CPU: 0 UID: 0 PID: 7757 Comm: syz.4.187 Not tainted syzkaller #0 PREEMPT(full) 
[  246.516071][ T7757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  246.516084][ T7757] Call Trace:
[  246.516090][ T7757]  <TASK>
[  246.516096][ T7757]  dump_stack_lvl+0x97/0xe0
[  246.516124][ T7757]  sysfs_warn_dup.cold+0x1c/0x28
[  246.516156][ T7757]  sysfs_create_dir_ns+0x129/0x140
[  246.516185][ T7757]  kobject_add_internal+0x104/0x310
[  246.516212][ T7757]  kobject_init_and_add+0xb2/0xf0
[  246.516240][ T7757]  ? alloc_workqueue_noprof+0xe0/0xb60
[  246.516268][ T7757]  gfs2_sys_fs_add+0xef/0x200
[  246.516298][ T7757]  gfs2_fill_super+0x896/0x1240
[  246.516319][ T7757]  ? sb_set_blocksize+0x8c/0x150
[  246.516345][ T7757]  ? setup_bdev_super+0x19d/0x330
[  246.516367][ T7757]  ? __pfx_gfs2_fill_super+0x10/0x10
[  246.516402][ T7757]  get_tree_bdev_flags+0x1c0/0x290
[  246.516430][ T7757]  gfs2_get_tree+0x26/0xd0
[  246.516469][ T7757]  vfs_get_tree+0x30/0x120
[  246.516490][ T7757]  path_mount+0x5a9/0x1350
[  246.516522][ T7757]  ? putname+0x78/0xe0
[  246.516553][ T7757]  __x64_sys_mount+0x1a3/0x1e0
[  246.516586][ T7757]  do_syscall_64+0xa4/0xf80
[  246.516619][ T7757]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  246.516641][ T7757] RIP: 0033:0x7fcdcc79c14a
[  246.516658][ T7757] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  246.516679][ T7757] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  246.516698][ T7757] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  246.516712][ T7757] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  246.516726][ T7757] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  246.516740][ T7757] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  246.516754][ T7757] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  246.516770][ T7757]  </TASK>
[  246.516781][ T7757] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  246.524424][ T7760] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  246.587485][ T7757] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  246.596489][ T6734] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  246.618629][ T7759] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  246.623587][ T7758] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  246.628519][ T7760] CPU: 0 UID: 0 PID: 7760 Comm: syz.1.184 Not tainted syzkaller #0 PREEMPT(full) 
[  246.628546][ T7760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  246.628559][ T7760] Call Trace:
[  246.628565][ T7760]  <TASK>
[  246.628572][ T7760]  dump_stack_lvl+0x97/0xe0
[  246.628602][ T7760]  sysfs_warn_dup.cold+0x1c/0x28
[  246.628634][ T7760]  sysfs_create_dir_ns+0x129/0x140
[  246.628667][ T7760]  kobject_add_internal+0x104/0x310
[  246.628694][ T7760]  kobject_init_and_add+0xb2/0xf0
[  246.628720][ T7760]  ? alloc_workqueue_noprof+0xe0/0xb60
[  246.628748][ T7760]  gfs2_sys_fs_add+0xef/0x200
[  246.628779][ T7760]  gfs2_fill_super+0x896/0x1240
[  246.628799][ T7760]  ? sb_set_blocksize+0x8c/0x150
[  246.628825][ T7760]  ? setup_bdev_super+0x19d/0x330
[  246.628848][ T7760]  ? __pfx_gfs2_fill_super+0x10/0x10
[  246.628883][ T7760]  get_tree_bdev_flags+0x1c0/0x290
[  246.628910][ T7760]  gfs2_get_tree+0x26/0xd0
[  246.628942][ T7760]  vfs_get_tree+0x30/0x120
[  246.628962][ T7760]  path_mount+0x5a9/0x1350
[  246.628995][ T7760]  ? putname+0x78/0xe0
[  246.629026][ T7760]  __x64_sys_mount+0x1a3/0x1e0
[  246.629058][ T7760]  do_syscall_64+0xa4/0xf80
[  246.629092][ T7760]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  246.629114][ T7760] RIP: 0033:0x7fd53b19c14a
[  246.629130][ T7760] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  246.629151][ T7760] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  246.629170][ T7760] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  246.629185][ T7760] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  246.629200][ T7760] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  246.629214][ T7760] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  246.629227][ T7760] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  246.629244][ T7760]  </TASK>
[  246.629291][ T7760] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  246.651034][ T6734] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 54ms
[  246.654551][ T7760] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  246.658576][ T7762] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.380233][ T7785] loop1: detected capacity change from 0 to 32768
[  247.413032][ T7785] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.424592][ T6734] gfs2: fsid=syz:syz.0: jid=0: Done
[  247.452759][ T7762] CPU: 0 UID: 0 PID: 7762 Comm: syz.2.185 Not tainted syzkaller #0 PREEMPT(full) 
[  247.452788][ T7762] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.452801][ T7762] Call Trace:
[  247.452808][ T7762]  <TASK>
[  247.452816][ T7762]  dump_stack_lvl+0x97/0xe0
[  247.452845][ T7762]  sysfs_warn_dup.cold+0x1c/0x28
[  247.452879][ T7762]  sysfs_create_dir_ns+0x129/0x140
[  247.452908][ T7762]  kobject_add_internal+0x104/0x310
[  247.452936][ T7762]  kobject_init_and_add+0xb2/0xf0
[  247.452963][ T7762]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.452992][ T7762]  gfs2_sys_fs_add+0xef/0x200
[  247.453024][ T7762]  gfs2_fill_super+0x896/0x1240
[  247.453044][ T7762]  ? sb_set_blocksize+0x8c/0x150
[  247.453070][ T7762]  ? setup_bdev_super+0x19d/0x330
[  247.453093][ T7762]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.453128][ T7762]  get_tree_bdev_flags+0x1c0/0x290
[  247.453155][ T7762]  gfs2_get_tree+0x26/0xd0
[  247.453188][ T7762]  vfs_get_tree+0x30/0x120
[  247.453209][ T7762]  path_mount+0x5a9/0x1350
[  247.453241][ T7762]  ? putname+0x78/0xe0
[  247.453272][ T7762]  __x64_sys_mount+0x1a3/0x1e0
[  247.453305][ T7762]  do_syscall_64+0xa4/0xf80
[  247.453341][ T7762]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.453363][ T7762] RIP: 0033:0x7fdf1779c14a
[  247.453378][ T7762] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.453400][ T7762] RSP: 002b:00007fdf1865fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.453421][ T7762] RAX: ffffffffffffffda RBX: 00007fdf1865fee0 RCX: 00007fdf1779c14a
[  247.453436][ T7762] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fdf1865fea0
[  247.453450][ T7762] RBP: 00002000000124c0 R08: 00007fdf1865fee0 R09: 0000000000000000
[  247.453464][ T7762] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.453477][ T7762] R13: 00007fdf1865fea0 R14: 0000000000012588 R15: 0000200000000000
[  247.453494][ T7762]  </TASK>
[  247.453507][ T7762] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  247.466434][ T7792] loop0: detected capacity change from 0 to 32768
[  247.484370][ T7788] loop3: detected capacity change from 0 to 32768
[  247.489500][ T7764] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  247.524980][ T7785] CPU: 0 UID: 0 PID: 7785 Comm: syz.1.190 Not tainted syzkaller #0 PREEMPT(full) 
[  247.525009][ T7785] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.525021][ T7785] Call Trace:
[  247.525028][ T7785]  <TASK>
[  247.525034][ T7785]  dump_stack_lvl+0x97/0xe0
[  247.525062][ T7785]  sysfs_warn_dup.cold+0x1c/0x28
[  247.525094][ T7785]  sysfs_create_dir_ns+0x129/0x140
[  247.525121][ T7785]  kobject_add_internal+0x104/0x310
[  247.525149][ T7785]  kobject_init_and_add+0xb2/0xf0
[  247.525177][ T7785]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.525207][ T7785]  gfs2_sys_fs_add+0xef/0x200
[  247.525237][ T7785]  gfs2_fill_super+0x896/0x1240
[  247.525258][ T7785]  ? sb_set_blocksize+0x8c/0x150
[  247.525283][ T7785]  ? setup_bdev_super+0x19d/0x330
[  247.525305][ T7785]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.525341][ T7785]  get_tree_bdev_flags+0x1c0/0x290
[  247.525368][ T7785]  gfs2_get_tree+0x26/0xd0
[  247.525400][ T7785]  vfs_get_tree+0x30/0x120
[  247.525421][ T7785]  path_mount+0x5a9/0x1350
[  247.525454][ T7785]  ? putname+0x78/0xe0
[  247.525485][ T7785]  __x64_sys_mount+0x1a3/0x1e0
[  247.525518][ T7785]  do_syscall_64+0xa4/0xf80
[  247.525553][ T7785]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.525576][ T7785] RIP: 0033:0x7fd53b19c14a
[  247.525592][ T7785] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.525620][ T7785] RSP: 002b:00007fd53c034e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.525640][ T7785] RAX: ffffffffffffffda RBX: 00007fd53c034ee0 RCX: 00007fd53b19c14a
[  247.525655][ T7785] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fd53c034ea0
[  247.525669][ T7785] RBP: 00002000000124c0 R08: 00007fd53c034ee0 R09: 0000000000000000
[  247.525683][ T7785] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.525697][ T7785] R13: 00007fd53c034ea0 R14: 0000000000012588 R15: 0000200000000000
[  247.525714][ T7785]  </TASK>
[  247.525723][ T7785] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  247.584001][ T7789] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.586758][ T7785] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  247.593336][ T7789] CPU: 0 UID: 0 PID: 7789 Comm: syz.4.192 Not tainted syzkaller #0 PREEMPT(full) 
[  247.593363][ T7789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.593376][ T7789] Call Trace:
[  247.593382][ T7789]  <TASK>
[  247.593389][ T7789]  dump_stack_lvl+0x97/0xe0
[  247.593417][ T7789]  sysfs_warn_dup.cold+0x1c/0x28
[  247.593450][ T7789]  sysfs_create_dir_ns+0x129/0x140
[  247.593479][ T7789]  kobject_add_internal+0x104/0x310
[  247.593513][ T7789]  kobject_init_and_add+0xb2/0xf0
[  247.593541][ T7789]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.593569][ T7789]  gfs2_sys_fs_add+0xef/0x200
[  247.593601][ T7789]  gfs2_fill_super+0x896/0x1240
[  247.593621][ T7789]  ? sb_set_blocksize+0x8c/0x150
[  247.593646][ T7789]  ? setup_bdev_super+0x19d/0x330
[  247.593669][ T7789]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.593705][ T7789]  get_tree_bdev_flags+0x1c0/0x290
[  247.593733][ T7789]  gfs2_get_tree+0x26/0xd0
[  247.593765][ T7789]  vfs_get_tree+0x30/0x120
[  247.593785][ T7789]  path_mount+0x5a9/0x1350
[  247.593818][ T7789]  ? putname+0x78/0xe0
[  247.593850][ T7789]  __x64_sys_mount+0x1a3/0x1e0
[  247.593883][ T7789]  do_syscall_64+0xa4/0xf80
[  247.593917][ T7789]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.593940][ T7789] RIP: 0033:0x7fcdcc79c14a
[  247.593956][ T7789] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.593981][ T7789] RSP: 002b:00007fcdcd73ee58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.594000][ T7789] RAX: ffffffffffffffda RBX: 00007fcdcd73eee0 RCX: 00007fcdcc79c14a
[  247.594014][ T7789] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fcdcd73eea0
[  247.594029][ T7789] RBP: 00002000000124c0 R08: 00007fcdcd73eee0 R09: 0000000000000000
[  247.594043][ T7789] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.594056][ T7789] R13: 00007fcdcd73eea0 R14: 0000000000012588 R15: 0000200000000000
[  247.594073][ T7789]  </TASK>
[  247.594095][ T7789] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  247.606654][ T7762] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  247.674655][ T7789] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  247.727222][ T7793] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.784633][ T7802] gfs2: fsid=syz:syz.0: fatal: filesystem consistency error - inode = 11 2339, function = gfs2_dinode_in, file = fs/gfs2/glops.c, line = 398
[  247.786011][ T7793] CPU: 1 UID: 0 PID: 7793 Comm: syz.5.193 Not tainted syzkaller #0 PREEMPT(full) 
[  247.786044][ T7793] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.786060][ T7793] Call Trace:
[  247.786067][ T7793]  <TASK>
[  247.786075][ T7793]  dump_stack_lvl+0x97/0xe0
[  247.786103][ T7793]  sysfs_warn_dup.cold+0x1c/0x28
[  247.786136][ T7793]  sysfs_create_dir_ns+0x129/0x140
[  247.786164][ T7793]  kobject_add_internal+0x104/0x310
[  247.786190][ T7793]  kobject_init_and_add+0xb2/0xf0
[  247.786217][ T7793]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.786245][ T7793]  gfs2_sys_fs_add+0xef/0x200
[  247.786275][ T7793]  gfs2_fill_super+0x896/0x1240
[  247.786304][ T7793]  ? sb_set_blocksize+0x8c/0x150
[  247.786329][ T7793]  ? setup_bdev_super+0x19d/0x330
[  247.786352][ T7793]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.786386][ T7793]  get_tree_bdev_flags+0x1c0/0x290
[  247.786414][ T7793]  gfs2_get_tree+0x26/0xd0
[  247.786446][ T7793]  vfs_get_tree+0x30/0x120
[  247.786465][ T7793]  path_mount+0x5a9/0x1350
[  247.786498][ T7793]  ? putname+0x78/0xe0
[  247.786529][ T7793]  __x64_sys_mount+0x1a3/0x1e0
[  247.786560][ T7793]  do_syscall_64+0xa4/0xf80
[  247.786593][ T7793]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.786615][ T7793] RIP: 0033:0x7fac29d9c14a
[  247.786631][ T7793] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.786652][ T7793] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.786671][ T7793] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  247.786685][ T7793] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  247.786700][ T7793] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  247.786714][ T7793] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.786727][ T7793] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  247.786744][ T7793]  </TASK>
[  247.786757][ T7793] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  247.790670][ T7792] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.795577][ T7793] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  247.802427][ T7792] CPU: 0 UID: 0 PID: 7792 Comm: syz.0.194 Not tainted syzkaller #0 PREEMPT(full) 
[  247.802456][ T7792] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.802469][ T7792] Call Trace:
[  247.802475][ T7792]  <TASK>
[  247.802481][ T7792]  dump_stack_lvl+0x97/0xe0
[  247.802509][ T7792]  sysfs_warn_dup.cold+0x1c/0x28
[  247.802548][ T7792]  sysfs_create_dir_ns+0x129/0x140
[  247.802590][ T7792]  kobject_add_internal+0x104/0x310
[  247.802618][ T7792]  kobject_init_and_add+0xb2/0xf0
[  247.802645][ T7792]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.802674][ T7792]  gfs2_sys_fs_add+0xef/0x200
[  247.802705][ T7792]  gfs2_fill_super+0x896/0x1240
[  247.802725][ T7792]  ? sb_set_blocksize+0x8c/0x150
[  247.802751][ T7792]  ? setup_bdev_super+0x19d/0x330
[  247.802774][ T7792]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.802809][ T7792]  get_tree_bdev_flags+0x1c0/0x290
[  247.802837][ T7792]  gfs2_get_tree+0x26/0xd0
[  247.802869][ T7792]  vfs_get_tree+0x30/0x120
[  247.802890][ T7792]  path_mount+0x5a9/0x1350
[  247.802922][ T7792]  ? putname+0x78/0xe0
[  247.802953][ T7792]  __x64_sys_mount+0x1a3/0x1e0
[  247.802987][ T7792]  do_syscall_64+0xa4/0xf80
[  247.803021][ T7792]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.803043][ T7792] RIP: 0033:0x7f6e1879c14a
[  247.803059][ T7792] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.803080][ T7792] RSP: 002b:00007f6e19604e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.803100][ T7792] RAX: ffffffffffffffda RBX: 00007f6e19604ee0 RCX: 00007f6e1879c14a
[  247.803114][ T7792] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f6e19604ea0
[  247.803129][ T7792] RBP: 00002000000124c0 R08: 00007f6e19604ee0 R09: 0000000000000000
[  247.803142][ T7792] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.803156][ T7792] R13: 00007f6e19604ea0 R14: 0000000000012588 R15: 0000200000000000
[  247.803173][ T7792]  </TASK>
[  247.803182][ T7792] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  247.809611][ T7802] gfs2: fsid=syz:syz.0: G:  s:EX n:2/923 f:aqonN t:EX d:EX/0 a:0 v:0 r:2 m:20 p:1
[  247.812198][ T7792] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  247.816938][ T7802] gfs2: fsid=syz:syz.0:  H: s:EX f:H e:0 p:7802 [gfs2_quotad/syz] gfs2_quota_sync+0x1da/0x330
[  247.821568][ T7788] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  247.826594][ T7802] gfs2: fsid=syz:syz.0:  I: n:11/2339 t:0 f:0x00 d:0x00000000 s:0 p:0
[  247.880320][ T7764] gfs2: fsid=syz:syz.0: found 1 quota changes
[  247.883851][ T7802] CPU: 1 UID: 0 PID: 7802 Comm: gfs2_quotad/syz Not tainted syzkaller #0 PREEMPT(full) 
[  247.883879][ T7802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.883892][ T7802] Call Trace:
[  247.883898][ T7802]  <TASK>
[  247.883906][ T7802]  dump_stack_lvl+0x97/0xe0
[  247.883933][ T7802]  gfs2_withdraw.cold+0xa/0x77
[  247.883954][ T7802]  inode_go_instantiate+0x498/0x560
[  247.883990][ T7802]  gfs2_instantiate+0xa7/0x130
[  247.884015][ T7802]  gfs2_glock_wait+0x100/0x140
[  247.884042][ T7802]  gfs2_glock_nq+0x60e/0x9d0
[  247.884072][ T7802]  ? gfs2_glstats_seq_show+0x50/0x60
[  247.884095][ T7802]  do_sync+0x3d3/0x760
[  247.884124][ T7802]  ? gfs2_quota_sync+0x1da/0x330
[  247.884151][ T7802]  gfs2_quota_sync+0x1da/0x330
[  247.884184][ T7802]  gfs2_quotad+0x32a/0x3a0
[  247.884212][ T7802]  ? __pfx_gfs2_quotad+0x10/0x10
[  247.884240][ T7802]  ? __pfx_gfs2_quotad+0x10/0x10
[  247.884268][ T7802]  kthread+0x161/0x310
[  247.884298][ T7802]  ? __pfx_kthread+0x10/0x10
[  247.884322][ T7802]  ret_from_fork+0x23c/0x320
[  247.884347][ T7802]  ? __pfx_kthread+0x10/0x10
[  247.884371][ T7802]  ret_from_fork_asm+0x1a/0x30
[  247.884401][ T7802]  </TASK>
[  247.983544][ T7788] CPU: 1 UID: 0 PID: 7788 Comm: syz.3.191 Not tainted syzkaller #0 PREEMPT(full) 
[  247.983573][ T7788] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  247.983586][ T7788] Call Trace:
[  247.983591][ T7788]  <TASK>
[  247.983597][ T7788]  dump_stack_lvl+0x97/0xe0
[  247.983625][ T7788]  sysfs_warn_dup.cold+0x1c/0x28
[  247.983659][ T7788]  sysfs_create_dir_ns+0x129/0x140
[  247.983687][ T7788]  kobject_add_internal+0x104/0x310
[  247.983714][ T7788]  kobject_init_and_add+0xb2/0xf0
[  247.983742][ T7788]  ? alloc_workqueue_noprof+0xe0/0xb60
[  247.983771][ T7788]  gfs2_sys_fs_add+0xef/0x200
[  247.983802][ T7788]  gfs2_fill_super+0x896/0x1240
[  247.983823][ T7788]  ? sb_set_blocksize+0x8c/0x150
[  247.983850][ T7788]  ? setup_bdev_super+0x19d/0x330
[  247.983872][ T7788]  ? __pfx_gfs2_fill_super+0x10/0x10
[  247.983908][ T7788]  get_tree_bdev_flags+0x1c0/0x290
[  247.983937][ T7788]  gfs2_get_tree+0x26/0xd0
[  247.983969][ T7788]  vfs_get_tree+0x30/0x120
[  247.983989][ T7788]  path_mount+0x5a9/0x1350
[  247.984022][ T7788]  ? putname+0x78/0xe0
[  247.984053][ T7788]  __x64_sys_mount+0x1a3/0x1e0
[  247.984086][ T7788]  do_syscall_64+0xa4/0xf80
[  247.984121][ T7788]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  247.984144][ T7788] RIP: 0033:0x7f174c79c14a
[  247.984160][ T7788] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  247.984181][ T7788] RSP: 002b:00007f174d598e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  247.984200][ T7788] RAX: ffffffffffffffda RBX: 00007f174d598ee0 RCX: 00007f174c79c14a
[  247.984215][ T7788] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007f174d598ea0
[  247.984229][ T7788] RBP: 00002000000124c0 R08: 00007f174d598ee0 R09: 0000000000000000
[  247.984243][ T7788] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  247.984256][ T7788] R13: 00007f174d598ea0 R14: 0000000000012588 R15: 0000200000000000
[  247.984273][ T7788]  </TASK>
[  247.984285][ T7788] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  248.017965][ T7764] gfs2: fsid=syz:syz.0: can't make FS RW: -5
[  248.137165][ T7788] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  248.372929][ T7807] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
[  248.457480][ T7809] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
[  248.464766][ T7807] gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
[  248.476142][ T7809] CPU: 1 UID: 0 PID: 7809 Comm: syz.5.196 Not tainted syzkaller #0 PREEMPT(full) 
[  248.476169][ T7809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  248.476182][ T7809] Call Trace:
[  248.476188][ T7809]  <TASK>
[  248.476194][ T7809]  dump_stack_lvl+0x97/0xe0
[  248.476223][ T7809]  sysfs_warn_dup.cold+0x1c/0x28
[  248.476258][ T7809]  sysfs_create_dir_ns+0x129/0x140
[  248.476287][ T7809]  kobject_add_internal+0x104/0x310
[  248.476314][ T7809]  kobject_init_and_add+0xb2/0xf0
[  248.476342][ T7809]  ? alloc_workqueue_noprof+0xe0/0xb60
[  248.476370][ T7809]  gfs2_sys_fs_add+0xef/0x200
[  248.476411][ T7809]  gfs2_fill_super+0x896/0x1240
[  248.476431][ T7809]  ? sb_set_blocksize+0x8c/0x150
[  248.476456][ T7809]  ? setup_bdev_super+0x19d/0x330
[  248.476479][ T7809]  ? __pfx_gfs2_fill_super+0x10/0x10
[  248.476515][ T7809]  get_tree_bdev_flags+0x1c0/0x290
[  248.476542][ T7809]  gfs2_get_tree+0x26/0xd0
[  248.476575][ T7809]  vfs_get_tree+0x30/0x120
[  248.476596][ T7809]  path_mount+0x5a9/0x1350
[  248.476628][ T7809]  ? putname+0x78/0xe0
[  248.476660][ T7809]  __x64_sys_mount+0x1a3/0x1e0
[  248.476692][ T7809]  do_syscall_64+0xa4/0xf80
[  248.476726][ T7809]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  248.476749][ T7809] RIP: 0033:0x7fac29d9c14a
[  248.476765][ T7809] Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
[  248.476786][ T7809] RSP: 002b:00007fac2abbce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[  248.476806][ T7809] RAX: ffffffffffffffda RBX: 00007fac2abbcee0 RCX: 00007fac29d9c14a
[  248.476820][ T7809] RDX: 00002000000124c0 RSI: 0000200000012500 RDI: 00007fac2abbcea0
[  248.476835][ T7809] RBP: 00002000000124c0 R08: 00007fac2abbcee0 R09: 0000000000000000
[  248.476848][ T7809] R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000012500
[  248.476862][ T7809] R13: 00007fac2abbcea0 R14: 0000000000012588 R15: 0000200000000000
[  248.476879][ T7809]  </TASK>
[  248.476889][ T7809] kobject: kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory.
[  248.488048][ T7807] gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
[  248.491132][ T7809] gfs2: fsid=syz:syz: error -17 adding sysfs files
[  248.499386][    T9] gfs2: fsid=syz:syz.0: jid=0, already locked for use
[  249.304832][    T9] gfs2: fsid=syz:syz.0: jid=0: Looking at journal...
[  249.315014][    T9] gfs2: fsid=syz:syz.0: jid=0: Journal head lookup took 10ms
[  249.322704][    T9] gfs2: fsid=syz:syz.0: jid=0: Done
[  249.328006][ T7807] gfs2: fsid=syz:syz.0: first mount done, others may mount
[  249.352876][ T7807] gfs2: fsid=syz:syz.0: found 1 quota changes
[  249.361360][ T6449] syz-executor: attempt to access beyond end of device
[  249.361360][ T6449] loop1: rw=8400897, sector=68719479080, nr_sectors = 8 limit=32768
[  249.376165][ T6449] Buffer I/O error on dev loop1, logical block 8589934885, lost async page write
[  249.385438][ T6449] gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_start_one, file = fs/gfs2/log.c, line = 116
[  249.398677][ T6449] CPU: 0 UID: 0 PID: 6449 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
[  249.398702][ T6449] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
[  249.398712][ T6449] Call Trace:
[  249.398717][ T6449]  <TASK>
[  249.398722][ T6449]  dump_stack_lvl+0x97/0xe0
[  249.398740][ T6449]  gfs2_withdraw.cold+0xa/0x77
[  249.398752][ T6449]  gfs2_io_error_bh_i.cold+0x2d/0x32
[  249.398765][ T6449]  gfs2_ail1_flush+0x497/0x7e0
[  249.398788][ T6449]  gfs2_ail1_start+0x4f/0x80
[  249.398810][ T6449]  gfs2_log_flush+0xf9a/0x1170
[  249.398823][ T6449]  gfs2_kill_sb+0x3e/0x1e0
[  249.398841][ T6449]  deactivate_locked_super+0x4f/0x120
[  249.398856][ T6449]  deactivate_super+0xa4/0xc0
[  249.398870][ T6449]  cleanup_mnt+0x145/0x1f0
[  249.398885][ T6449]  task_work_run+0x95/0xf0
[  249.398903][ T6449]  exit_to_user_mode_loop+0xcf/0x440
[  249.398919][ T6449]  do_syscall_64+0x2b8/0xf80
[  249.398940][ T6449]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[  249.398954][ T6449] RIP: 0033:0x7fd53b19c117
[  249.398964][ T6449] Code: a2 c7 05 7c 94 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
[  249.398977][ T6449] RSP: 002b:00007ffc31f14458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[  249.398989][ T6449] RAX: 0000000000000000 RBX: 00007fd53b20471f RCX: 00007fd53b19c117
[  249.398997][ T6449] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc31f14510
[  249.399004][ T6449] RBP: 00007ffc31f14510 R08: 00007ffc31f15510 R09: 00000000ffffffff
[  249.399012][ T6449] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc31f155a0
[  249.399019][ T6449] R13: 00007fd53b20471f R14: 000000000003c8d3 R15: 00007ffc31f155e0
[  249.399029][ T6449]  </TASK>
[  249.399033][ T6449] gfs2: fsid=syz:syz.0: about to withdraw this file system
[  254.498072][ T1309] ieee802154 phy0 wpan0: encryption failed: -22
[  254.504443][ T1309] ieee802154 phy1 wpan1: encryption failed: -22
[  254.658795][    T9] gfs2: fsid=syz:syz.0: file system withdrawn
[  256.544776][ T6222] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
BUG: memory leak
unreferenced object 0xffff88812de7c000 (size 8192):
  comm "syz.6.189", pid 7764, jiffies 4294962014
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 8429a099):
    __kmalloc_noprof+0x465/0x680
    gfs2_quota_init+0xe5/0x820
    gfs2_make_fs_rw+0x7a/0xe0
    gfs2_fill_super+0xfbb/0x1240
    get_tree_bdev_flags+0x1c0/0x290
    gfs2_get_tree+0x26/0xd0
    vfs_get_tree+0x30/0x120
    path_mount+0x5a9/0x1350
    __x64_sys_mount+0x1a3/0x1e0
    do_syscall_64+0xa4/0xf80
    entry_SYSCALL_64_after_hwframe+0x77/0x7f

connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
[  259.593524][   T64] netdevsim netdevsim1 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.688769][   T64] netdevsim netdevsim1 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.738716][   T64] netdevsim netdevsim1 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.779375][   T64] netdevsim netdevsim1 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.853497][   T64] netdevsim netdevsim5 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.888568][   T64] netdevsim netdevsim5 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.928597][   T64] netdevsim netdevsim5 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  259.999148][   T64] netdevsim netdevsim5 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.081911][   T64] netdevsim netdevsim6 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.119074][   T64] netdevsim netdevsim6 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.169388][   T64] netdevsim netdevsim6 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.219080][   T64] netdevsim netdevsim6 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.264072][   T64] netdevsim netdevsim4 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.288610][   T64] netdevsim netdevsim4 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.328509][   T64] netdevsim netdevsim4 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.379620][   T64] netdevsim netdevsim4 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.451665][   T64] netdevsim netdevsim3 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.488310][   T64] netdevsim netdevsim3 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.529459][   T64] netdevsim netdevsim3 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.579363][   T64] netdevsim netdevsim3 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.637722][   T64] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.673981][   T64] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.718738][   T64] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.770390][   T64] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  260.835991][   T64] bridge_slave_1: left allmulticast mode
[  260.842396][   T64] bridge_slave_1: left promiscuous mode
[  260.849107][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  260.856647][   T64] bridge_slave_0: left allmulticast mode
[  260.862656][   T64] bridge_slave_0: left promiscuous mode
[  260.868536][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  260.876358][   T64] bridge_slave_1: left allmulticast mode
[  260.882364][   T64] bridge_slave_1: left promiscuous mode
[  260.888197][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  260.895775][   T64] bridge_slave_0: left allmulticast mode
[  260.901837][   T64] bridge_slave_0: left promiscuous mode
[  260.907854][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  260.915593][   T64] bridge_slave_1: left allmulticast mode
[  260.921510][   T64] bridge_slave_1: left promiscuous mode
[  260.927430][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  260.935072][   T64] bridge_slave_0: left allmulticast mode
[  260.940963][   T64] bridge_slave_0: left promiscuous mode
[  260.947210][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  260.954835][   T64] bridge_slave_1: left allmulticast mode
[  260.960787][   T64] bridge_slave_1: left promiscuous mode
[  260.966543][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  260.974095][   T64] bridge_slave_0: left allmulticast mode
[  260.980002][   T64] bridge_slave_0: left promiscuous mode
[  260.985686][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  260.993475][   T64] bridge_slave_1: left allmulticast mode
[  260.999189][   T64] bridge_slave_1: left promiscuous mode
[  261.004798][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  261.012781][   T64] bridge_slave_0: left allmulticast mode
[  261.018657][   T64] bridge_slave_0: left promiscuous mode
[  261.024260][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  261.031901][   T64] bridge_slave_1: left allmulticast mode
[  261.037844][   T64] bridge_slave_1: left promiscuous mode
[  261.043449][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  261.051059][   T64] bridge_slave_0: left allmulticast mode
[  261.056678][   T64] bridge_slave_0: left promiscuous mode
[  261.062512][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  261.128803][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.138079][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.147200][   T64] bond0 (unregistering): Released all slaves
[  261.218233][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.228024][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.236951][   T64] bond0 (unregistering): Released all slaves
[  261.278255][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.288105][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.297511][   T64] bond0 (unregistering): Released all slaves
[  261.348515][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.357800][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.366783][   T64] bond0 (unregistering): Released all slaves
[  261.428190][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.437444][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.446330][   T64] bond0 (unregistering): Released all slaves
[  261.488899][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  261.498216][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  261.507330][   T64] bond0 (unregistering): Released all slaves
[  262.034869][   T64] hsr_slave_0: left promiscuous mode
[  262.040487][   T64] hsr_slave_1: left promiscuous mode
[  262.046034][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.054358][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.061967][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.069567][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.078092][   T64] hsr_slave_0: left promiscuous mode
[  262.083644][   T64] hsr_slave_1: left promiscuous mode
[  262.089624][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.097315][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.104648][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.112458][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.120706][   T64] hsr_slave_0: left promiscuous mode
[  262.126257][   T64] hsr_slave_1: left promiscuous mode
[  262.132003][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.139615][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.147307][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.154775][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.163205][   T64] hsr_slave_0: left promiscuous mode
[  262.168783][   T64] hsr_slave_1: left promiscuous mode
[  262.174207][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.181646][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.189306][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.196756][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.204959][   T64] hsr_slave_0: left promiscuous mode
[  262.210729][   T64] hsr_slave_1: left promiscuous mode
[  262.216198][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.223662][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.231320][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.238956][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.247550][   T64] hsr_slave_0: left promiscuous mode
[  262.253124][   T64] hsr_slave_1: left promiscuous mode
[  262.258798][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  262.266253][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  262.273911][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  262.281331][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  262.293690][   T64] veth1_macvtap: left promiscuous mode
[  262.299510][   T64] veth0_macvtap: left promiscuous mode
[  262.305089][   T64] veth1_vlan: left promiscuous mode
[  262.310837][   T64] veth0_vlan: left promiscuous mode
[  262.316344][   T64] veth1_macvtap: left promiscuous mode
[  262.322033][   T64] veth0_macvtap: left promiscuous mode
[  262.327616][   T64] veth1_vlan: left promiscuous mode
[  262.332894][   T64] veth0_vlan: left promiscuous mode
[  262.338756][   T64] veth1_macvtap: left promiscuous mode
[  262.344260][   T64] veth0_macvtap: left promiscuous mode
[  262.349853][   T64] veth1_vlan: left promiscuous mode
[  262.355058][   T64] veth0_vlan: left promiscuous mode
[  262.360629][   T64] veth1_macvtap: left promiscuous mode
[  262.366164][   T64] veth0_macvtap: left promiscuous mode
[  262.371712][   T64] veth1_vlan: left promiscuous mode
[  262.377571][   T64] veth0_vlan: left promiscuous mode
[  262.383090][   T64] veth1_macvtap: left promiscuous mode
[  262.388592][   T64] veth0_macvtap: left promiscuous mode
[  262.394168][   T64] veth1_vlan: left promiscuous mode
[  262.399395][   T64] veth0_vlan: left promiscuous mode
[  262.404857][   T64] veth1_macvtap: left promiscuous mode
[  262.410344][   T64] veth0_macvtap: left promiscuous mode
[  262.416036][   T64] veth1_vlan: left promiscuous mode
[  262.421324][   T64] veth0_vlan: left promiscuous mode
[  262.501935][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.511822][   T64] team0 (unregistering): Port device team_slave_0 removed
[  262.536576][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.544740][   T64] team0 (unregistering): Port device team_slave_0 removed
[  262.569938][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.579207][   T64] team0 (unregistering): Port device team_slave_0 removed
[  262.605032][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.613282][   T64] team0 (unregistering): Port device team_slave_0 removed
[  262.634728][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.646108][   T64] team0 (unregistering): Port device team_slave_0 removed
[  262.670763][   T64] team0 (unregistering): Port device team_slave_1 removed
[  262.681867][   T64] team0 (unregistering): Port device team_slave_0 removed
[  263.690642][   T64] netdevsim netdevsim2 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  263.748500][   T64] netdevsim netdevsim2 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  263.818323][   T64] netdevsim netdevsim2 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  263.879693][   T64] netdevsim netdevsim2 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
[  263.940929][   T64] bridge_slave_1: left allmulticast mode
[  263.946676][   T64] bridge_slave_1: left promiscuous mode
[  263.952434][   T64] bridge0: port 2(bridge_slave_1) entered disabled state
[  263.960109][   T64] bridge_slave_0: left allmulticast mode
[  263.965740][   T64] bridge_slave_0: left promiscuous mode
[  263.971528][   T64] bridge0: port 1(bridge_slave_0) entered disabled state
[  264.019941][   T64] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface
[  264.029353][   T64] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface
[  264.038492][   T64] bond0 (unregistering): Released all slaves
[  264.189196][   T64] hsr_slave_0: left promiscuous mode
[  264.194820][   T64] hsr_slave_1: left promiscuous mode
[  264.201040][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_0
[  264.208726][   T64] batman_adv: batadv0: Removing interface: batadv_slave_0
[  264.216711][   T64] batman_adv: batadv0: Interface deactivated: batadv_slave_1
[  264.224233][   T64] batman_adv: batadv0: Removing interface: batadv_slave_1
[  264.232777][   T64] veth1_macvtap: left promiscuous mode
[  264.238568][   T64] veth0_macvtap: left promiscuous mode
[  264.244084][   T64] veth1_vlan: left promiscuous mode
[  264.249472][   T64] veth0_vlan: left promiscuous mode
[  264.273398][   T64] team0 (unregistering): Port device team_slave_1 removed
[  264.282869][   T64] team0 (unregistering): Port device team_slave_0 removed