loop0: detected capacity change from 0 to 32768
BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5326)
BTRFS info (device loop0): first mount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop0): using sha256 (sha256-x86_64) checksum algorithm
BTRFS info (device loop0): using free-space-tree
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-08486-gf66bc387efbe #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x414/0x560 lib/fault-inject.c:174
 should_failslab+0xa8/0x100 mm/failslab.c:46
 slab_pre_alloc_hook mm/slub.c:4100 [inline]
 slab_alloc_node mm/slub.c:4176 [inline]
 kmem_cache_alloc_noprof+0x73/0x3c0 mm/slub.c:4203
 __kernfs_new_node+0xd7/0x7e0 fs/kernfs/dir.c:637
 kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:713
 kernfs_create_dir_ns+0x44/0x130 fs/kernfs/dir.c:1083
 sysfs_create_dir_ns+0x123/0x280 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x59f/0xb40 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_init_and_add+0x125/0x190 lib/kobject.c:457
 btrfs_sysfs_add_qgroups+0x111/0x2b0 fs/btrfs/sysfs.c:2635
 btrfs_quota_enable+0x278/0x1d50 fs/btrfs/qgroup.c:1030
 btrfs_ioctl_quota_ctl+0x183/0x1c0 fs/btrfs/ioctl.c:3673
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4554b8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4555aa0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4554db5fa0 RCX: 00007f4554b8e969
RDX: 00002000000000c0 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f4555aa0090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f4554db5fa0 R15: 00007fffdb1c7248
 </TASK>
kobject: kobject_add_internal failed for qgroups (error: -12 parent: 395ef67a-297e-477c-816d-cd80a5b93e5d)
------------[ cut here ]------------
kernfs: can not remove 'enabled', no directory
WARNING: CPU: 0 PID: 5326 at fs/kernfs/dir.c:1707 kernfs_remove_by_name_ns+0xd1/0x130 fs/kernfs/dir.c:1706
Modules linked in:
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-08486-gf66bc387efbe #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kernfs_remove_by_name_ns+0xd1/0x130 fs/kernfs/dir.c:1706
Code: 4c 89 f7 e8 c1 f2 ff ff 4c 89 f7 e8 69 9b ff ff 31 ed eb 2b e8 a0 b5 62 ff 90 48 c7 c7 c0 33 9c 8b 4c 89 f6 e8 30 8f 26 ff 90 <0f> 0b 90 90 bd fe ff ff ff eb 12 e8 7f b5 62 ff bd fe ff ff ff 48
RSP: 0018:ffffc9000d31fb30 EFLAGS: 00010246
RAX: e9e5cfdc3047c500 RBX: ffffffff8bcdfa20 RCX: ffff88801c72a440
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa664 R12: 0000000000000000
R13: ffffffff8e6dea40 R14: ffffffff8bcdfa80 R15: 0000000000000000
FS:  00007f4555aa06c0(0000) GS:ffff88808d263000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056314f0d2af0 CR3: 0000000035de1000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kernfs_remove_by_name include/linux/kernfs.h:633 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfc/0x2c0 fs/sysfs/group.c:322
 sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:346
 __kobject_del+0x84/0x300 lib/kobject.c:595
 kobject_del+0x45/0x60 lib/kobject.c:627
 btrfs_sysfs_del_qgroups+0x115/0x160 fs/btrfs/sysfs.c:2610
 btrfs_sysfs_add_qgroups+0x286/0x2b0 fs/btrfs/sysfs.c:2649
 btrfs_quota_enable+0x278/0x1d50 fs/btrfs/qgroup.c:1030
 btrfs_ioctl_quota_ctl+0x183/0x1c0 fs/btrfs/ioctl.c:3673
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4554b8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4555aa0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4554db5fa0 RCX: 00007f4554b8e969
RDX: 00002000000000c0 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f4555aa0090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f4554db5fa0 R15: 00007fffdb1c7248
 </TASK>