FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5338 Comm: syz.0.0 Not tainted syzkaller #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:
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:4901 [inline]
slab_alloc_node mm/slub.c:5234 [inline]
kmem_cache_alloc_noprof+0x88/0x710 mm/slub.c:5265
__kernfs_new_node+0xdc/0x880 fs/kernfs/dir.c:637
kernfs_new_node+0x102/0x210 fs/kernfs/dir.c:716
kernfs_create_dir_ns+0x44/0x130 fs/kernfs/dir.c:1086
sysfs_create_dir_ns+0x123/0x280 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x6ab/0xcc0 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:2697
btrfs_quota_enable+0x25b/0x2900 fs/btrfs/qgroup.c:1002
btrfs_ioctl_quota_ctl+0x183/0x1c0 fs/btrfs/ioctl.c:3613
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f683bd8f7c9
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:00007f683cb6d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f683bfe6090 RCX: 00007f683bd8f7c9
RDX: 0000200000001580 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f683cb6d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f683bfe6128 R14: 00007f683bfe6090 R15: 00007ffc9e0b4a68
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: fs/kernfs/dir.c:1710 at 0x0, CPU#0: syz.0.0/5338
Modules linked in:
CPU: 0 UID: 0 PID: 5338 Comm: syz.0.0 Not tainted syzkaller #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+0xca/0x130 fs/kernfs/dir.c:1709
Code: 44 c3 ff 3e 41 ff 06 4c 89 f7 e8 e1 f1 ff ff 4c 89 f7 e8 d9 97 ff ff 31 ed eb 25 e8 80 65 5b ff 48 8d 3d 99 5a 41 0d 4c 89 f6 <67> 48 0f b9 3a bd fe ff ff ff eb 12 e8 65 65 5b ff bd fe ff ff ff
RSP: 0018:ffffc9000d64faf0 EFLAGS: 00010293
RAX: ffffffff82665b10 RBX: ffffffff8bcfb380 RCX: ffff8880006c4980
RDX: 0000000000000000 RSI: ffffffff8bcfb3e0 RDI: ffffffff8fa7b5b0
RBP: dffffc0000000000 R08: ffffc9000d64f7e7 R09: 1ffff92001ac9efc
R10: dffffc0000000000 R11: fffff52001ac9efd R12: 0000000000000000
R13: ffffffff8e705340 R14: ffffffff8bcfb3e0 R15: 0000000000000000
FS: 00007f683cb6d6c0(0000) GS:ffff88808d239000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb2c7532b0 CR3: 000000001279b000 CR4: 0000000000352ef0
Call Trace:
kernfs_remove_by_name include/linux/kernfs.h:633 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xfc/0x2f0 fs/sysfs/group.c:328
sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:352
__kobject_del+0x84/0x330 lib/kobject.c:595
kobject_del+0x45/0x60 lib/kobject.c:627
btrfs_sysfs_del_qgroups+0x115/0x160 fs/btrfs/sysfs.c:2672
btrfs_sysfs_add_qgroups+0x286/0x2b0 fs/btrfs/sysfs.c:2711
btrfs_quota_enable+0x25b/0x2900 fs/btrfs/qgroup.c:1002
btrfs_ioctl_quota_ctl+0x183/0x1c0 fs/btrfs/ioctl.c:3613
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f683bd8f7c9
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:00007f683cb6d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f683bfe6090 RCX: 00007f683bd8f7c9
RDX: 0000200000001580 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f683cb6d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f683bfe6128 R14: 00007f683bfe6090 R15: 00007ffc9e0b4a68
----------------
Code disassembly (best guess), 3 bytes skipped:
0: 3e 41 ff 06 ds incl (%r14)
4: 4c 89 f7 mov %r14,%rdi
7: e8 e1 f1 ff ff call 0xfffff1ed
c: 4c 89 f7 mov %r14,%rdi
f: e8 d9 97 ff ff call 0xffff97ed
14: 31 ed xor %ebp,%ebp
16: eb 25 jmp 0x3d
18: e8 80 65 5b ff call 0xff5b659d
1d: 48 8d 3d 99 5a 41 0d lea 0xd415a99(%rip),%rdi # 0xd415abd
24: 4c 89 f6 mov %r14,%rsi
* 27: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2c: bd fe ff ff ff mov $0xfffffffe,%ebp
31: eb 12 jmp 0x45
33: e8 65 65 5b ff call 0xff5b659d
38: bd fe ff ff ff mov $0xfffffffe,%ebp