R13: 0000000020000100 R14: 00007f62a7510000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. WARNING: can't dereference registers at (null) for ip apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" CPU: 1 PID: 23756 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2: fsid=syz:syz: Now mounting FS... gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 gfs2: fsid=syz:syz.0: jid=0: Looking at journal... gfs2: fsid=syz:syz.0: jid=0: Done fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2: fsid=syz:syz.0: first mount done, others may mount gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18508dcc2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f184de51fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f18508dcc2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f184de52000 RBP: 00007f184de52040 R08: 00007f184de52040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f184de52000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS... gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2: fsid=syz:syz.0: jid=0: Looking at journal... gfs2: fsid=syz:syz.0: jid=0: Done sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz.0: first mount done, others may mount CPU: 1 PID: 23842 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0aca234c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ac77a9fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0aca234c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0ac77aa000 RBP: 00007f0ac77aa040 R08: 00007f0ac77aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f0ac77aa000 R15: 0000000020047a20 CPU: 0 PID: 23861 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 gfs2: fsid=syz:syz: error -17 adding sysfs files fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz: Now mounting FS... CPU: 1 PID: 23922 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0aca234c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ac77a9fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0aca234c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0ac77aa000 RBP: 00007f0ac77aa040 R08: 00007f0ac77aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f0ac77aa000 R15: 0000000020047a20 gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2: fsid=syz:syz.0: jid=0: Looking at journal... gfs2: fsid=syz:syz.0: jid=0: Done gfs2: fsid=syz:syz.0: first mount done, others may mount sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 1 PID: 23927 Comm: syz-executor.4 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f62a9f9ac2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f62a750ffa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f62a9f9ac2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f62a7510000 RBP: 00007f62a7510040 R08: 00007f62a7510040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f62a7510000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: error -17 adding sysfs files sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 1 PID: 23931 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS... gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2: fsid=syz:syz.0: jid=0: Looking at journal... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 0 PID: 24009 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 gfs2: fsid=syz:syz.0: jid=0: Done mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 gfs2: fsid=syz:syz.0: first mount done, others may mount ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18508dcc2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f184de51fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f18508dcc2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f184de52000 RBP: 00007f184de52040 R08: 00007f184de52040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f184de52000 R15: 0000000020047a20 CPU: 1 PID: 24006 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 gfs2: fsid=syz:syz: error -17 adding sysfs files create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0aca234c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ac77a9fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0aca234c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0ac77aa000 RBP: 00007f0ac77aa040 R08: 00007f0ac77aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f0ac77aa000 R15: 0000000020047a20 CPU: 0 PID: 24015 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2: fsid=syz:syz.0: jid=0: Looking at journal... CPU: 1 PID: 24072 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 gfs2: fsid=syz:syz.0: jid=0: Done create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2: fsid=syz:syz.0: first mount done, others may mount gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18508dcc2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f184de51fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f18508dcc2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f184de52000 RBP: 00007f184de52040 R08: 00007f184de52040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f184de52000 R15: 0000000020047a20 CPU: 0 PID: 24085 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 gfs2: fsid=syz:syz: error -17 adding sysfs files create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. CPU: 1 PID: 24086 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 gfs2: fsid=syz:syz: error -17 adding sysfs files create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0aca234c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ac77a9fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0aca234c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0ac77aa000 RBP: 00007f0ac77aa040 R08: 00007f0ac77aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f0ac77aa000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 1 PID: 24149 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 CPU: 0 PID: 24148 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 gfs2: fsid=syz:syz: error -17 adding sysfs files fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 gfs2: fsid=syz:syz.0: jid=0, already locked for use ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18508dcc2a gfs2: fsid=syz:syz.0: jid=0: Looking at journal... Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f184de51fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f18508dcc2a gfs2: fsid=syz:syz.0: jid=0: Done RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f184de52000 RBP: 00007f184de52040 R08: 00007f184de52040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f184de52000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. CPU: 1 PID: 24153 Comm: syz-executor.5 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0aca234c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0ac77a9fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f0aca234c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0ac77aa000 RBP: 00007f0ac77aa040 R08: 00007f0ac77aa040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f0ac77aa000 R15: 0000000020047a20 gfs2: fsid=syz:syz.0: first mount done, others may mount kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz: Now mounting FS... CPU: 0 PID: 24214 Comm: syz-executor.0 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2: fsid=syz:syz.0: jid=0, already locked for use gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 gfs2: fsid=syz:syz.0: jid=0: Looking at journal... mount_fs+0xa3/0x310 fs/super.c:1261 gfs2: fsid=syz:syz.0: jid=0: Done vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 gfs2: fsid=syz:syz.0: first mount done, others may mount ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fece4cf2c2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fece2267fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fece4cf2c2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fece2268000 RBP: 00007fece2268040 R08: 00007fece2268040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007fece2268000 R15: 0000000020047a20 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 1 PID: 24220 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 gfs2: fsid=syz:syz: error -17 adding sysfs files kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f18508dcc2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f184de51fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f18508dcc2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f184de52000 RBP: 00007f184de52040 R08: 00007f184de52040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f184de52000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' CPU: 1 PID: 24225 Comm: syz-executor.4 Not tainted 4.19.207-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 sysfs_warn_dup.cold+0x1c/0x29 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x228/0x280 fs/sysfs/dir.c:63 create_dir lib/kobject.c:88 [inline] kobject_add_internal+0x2a5/0x9c0 lib/kobject.c:247 kobject_add_varg lib/kobject.c:382 [inline] kobject_init_and_add+0x101/0x160 lib/kobject.c:453 gfs2_sys_fs_add+0x18e/0x440 fs/gfs2/sys.c:659 fill_super+0x1240/0x2550 fs/gfs2/ops_fstype.c:1103 gfs2_mount+0x4c0/0x5a0 fs/gfs2/ops_fstype.c:1316 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f62a9f9ac2a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f62a750ffa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f62a9f9ac2a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f62a7510000 RBP: 00007f62a7510040 R08: 00007f62a7510040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f62a7510000 R15: 0000000020047a20 kobject_add_internal failed for syz:syz with -EEXIST, don't try to register things with the same name in the same directory. gfs2: fsid=syz:syz: error -17 adding sysfs files ---------------- Code disassembly (best guess): 0: 48 c7 c2 bc ff ff ff mov $0xffffffffffffffbc,%rdx 7: f7 d8 neg %eax 9: 64 89 02 mov %eax,%fs:(%rdx) c: b8 ff ff ff ff mov $0xffffffff,%eax 11: eb d2 jmp 0xffffffe5 13: e8 b8 04 00 00 callq 0x4d0 18: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 1f: 00 20: 49 89 ca mov %rcx,%r10 23: b8 a5 00 00 00 mov $0xa5,%eax 28: 0f 05 syscall * 2a: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 retq 33: 48 c7 c1 bc ff ff ff mov $0xffffffffffffffbc,%rcx 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W