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 syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x410/0x560 lib/fault-inject.c:174
should_failslab+0xa8/0x100 mm/failslab.c:46
slab_pre_alloc_hook mm/slub.c:4638 [inline]
slab_alloc_node mm/slub.c:4974 [inline]
kmem_cache_alloc_noprof+0xa1/0x600 mm/slub.c:5010
__kernfs_new_node+0xe6/0x980 fs/kernfs/dir.c:667
kernfs_new_node fs/kernfs/dir.c:759 [inline]
kernfs_create_dir_ns+0xf7/0x220 fs/kernfs/dir.c:1133
sysfs_create_dir_ns+0x12f/0x2a0 fs/sysfs/dir.c:59
create_dir lib/kobject.c:73 [inline]
kobject_add_internal+0x622/0xcd0 lib/kobject.c:240
kobject_add_varg lib/kobject.c:374 [inline]
kobject_init_and_add+0x12b/0x1a0 lib/kobject.c:457
btrfs_sysfs_add_qgroups+0x118/0x2f0 fs/btrfs/sysfs.c:2604
btrfs_quota_enable+0x274/0x1e20 fs/btrfs/qgroup.c:1032
btrfs_ioctl_quota_ctl+0x186/0x1f0 fs/btrfs/ioctl.c:3581
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:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8583b9f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8584a9dfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8583e26090 RCX: 00007f8583b9f559
RDX: 0000200000001300 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f8584a9e050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f8583e26128 R14: 00007f8583e26090 R15: 00007fff1a8a4a68
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:1785 at kernfs_remove_by_name_ns+0xd8/0x140 fs/kernfs/dir.c:1784, CPU#0: syz.0.0/5326
Modules linked in:
CPU: 0 UID: 0 PID: 5326 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 04/01/2014
RIP: 0010:kernfs_remove_by_name_ns+0xdb/0x140 fs/kernfs/dir.c:1784
Code: b1 bd ff f0 41 ff 07 4c 89 ff e8 90 ee ff ff 4c 89 ff e8 68 89 ff ff 31 ed eb 25 e8 ef 2f 4b ff 48 8d 3d e8 f3 03 0f 4c 89 fe <67> 48 0f b9 3a bd fe ff ff ff eb 1a e8 d4 2f 4b ff bd fe ff ff ff
RSP: 0018:ffffc9000f7b7b10 EFLAGS: 00010293
RAX: ffffffff827d0651 RBX: ffffffff8c5a80e0 RCX: ffff8880350e4b00
RDX: 0000000000000000 RSI: ffffffff8c5a8140 RDI: ffffffff9180fa40
RBP: ffffffff903e7c48 R08: ffff88801fa24713 R09: 1ffff11003f448e2
R10: dffffc0000000000 R11: ffffed1003f448e3 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8c5a8140
FS: 00007f8584a9e6c0(0000) GS:ffff88808b0b0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000014314000 CR4: 0000000000352ef0
Call Trace:
kernfs_remove_by_name include/linux/kernfs.h:644 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0x101/0x2e0 fs/sysfs/group.c:328
sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:352
__kobject_del+0x83/0x310 lib/kobject.c:595
kobject_del+0x45/0x60 lib/kobject.c:627
btrfs_sysfs_del_qgroups+0x114/0x160 fs/btrfs/sysfs.c:2579
btrfs_sysfs_add_qgroups+0x28a/0x2f0 fs/btrfs/sysfs.c:2618
btrfs_quota_enable+0x274/0x1e20 fs/btrfs/qgroup.c:1032
btrfs_ioctl_quota_ctl+0x186/0x1f0 fs/btrfs/ioctl.c:3581
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:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8583b9f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8584a9dfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8583e26090 RCX: 00007f8583b9f559
RDX: 0000200000001300 RSI: 00000000c0109428 RDI: 0000000000000003
RBP: 00007f8584a9e050 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f8583e26128 R14: 00007f8583e26090 R15: 00007fff1a8a4a68
----------------
Code disassembly (best guess):
0: b1 bd mov $0xbd,%cl
2: ff f0 push %rax
4: 41 ff 07 incl (%r15)
7: 4c 89 ff mov %r15,%rdi
a: e8 90 ee ff ff call 0xffffee9f
f: 4c 89 ff mov %r15,%rdi
12: e8 68 89 ff ff call 0xffff897f
17: 31 ed xor %ebp,%ebp
19: eb 25 jmp 0x40
1b: e8 ef 2f 4b ff call 0xff4b300f
20: 48 8d 3d e8 f3 03 0f lea 0xf03f3e8(%rip),%rdi # 0xf03f40f
27: 4c 89 fe mov %r15,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: bd fe ff ff ff mov $0xfffffffe,%ebp
34: eb 1a jmp 0x50
36: e8 d4 2f 4b ff call 0xff4b300f
3b: bd fe ff ff ff mov $0xfffffffe,%ebp