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 alloc_empty_file+0x5b/0x1d0 fs/file_table.c:262 path_openat+0x9a/0x2090 fs/namei.c:4985 do_file_open+0x23e/0x4a0 fs/namei.c:5028 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1434 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: 0033:0x7f0263b5ed8e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007f025fff4ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f025fff56c0 RCX: 00007f0263b5ed8e RDX: 0000000000000002 RSI: 00007f025fff4bc0 RDI: ffffffffffffff9c RBP: 00007f025fff4bc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd R13: 00007f0263e26038 R14: 00007f0263e25fa0 R15: 00007ffde5467c78 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 5, space 0, times 9997 CPU: 0 UID: 0 PID: 5324 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:665 kernfs_new_node fs/kernfs/dir.c:751 [inline] kernfs_create_dir_ns+0xfe/0x230 fs/kernfs/dir.c:1120 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: 0033:0x7f0263b9e559 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:00007f025fff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0263e25fa0 RCX: 00007f0263b9e559 RDX: 0000200000005cc0 RSI: 00000000c0109428 RDI: 0000000000000005 RBP: 00007f0263c35ad8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0263e26038 R14: 00007f0263e25fa0 R15: 00007ffde5467c78 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:1786 at kernfs_remove_by_name_ns+0xd8/0x140 fs/kernfs/dir.c:1785, CPU#0: syz.0.0/5324 Modules linked in: CPU: 0 UID: 0 PID: 5324 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:1785 Code: 08 be ff f0 41 ff 07 4c 89 ff e8 c0 ee ff ff 4c 89 ff e8 c8 88 ff ff 31 ed eb 25 e8 8f 8d 4b ff 48 8d 3d 58 56 04 0f 4c 89 fe <67> 48 0f b9 3a bd fe ff ff ff eb 1a e8 74 8d 4b ff bd fe ff ff ff RSP: 0018:ffffc90000ec7b10 EFLAGS: 00010287 RAX: ffffffff827c9581 RBX: ffffffff8c5a7d20 RCX: 0000000000100000 RDX: ffffc9000f551000 RSI: ffffffff8c5a7d80 RDI: ffffffff9180ebe0 RBP: ffffffff903e6b08 R08: ffff88801fa24713 R09: 1ffff11003f448e2 R10: dffffc0000000000 R11: ffffed1003f448e3 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff8c5a7d80 FS: 00007f025fff56c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005595e2e7e31c CR3: 000000004548c000 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: 0033:0x7f0263b9e559 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:00007f025fff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f0263e25fa0 RCX: 00007f0263b9e559 RDX: 0000200000005cc0 RSI: 00000000c0109428 RDI: 0000000000000005 RBP: 00007f0263c35ad8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0263e26038 R14: 00007f0263e25fa0 R15: 00007ffde5467c78 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: ff f0 push %rax 2: 41 ff 07 incl (%r15) 5: 4c 89 ff mov %r15,%rdi 8: e8 c0 ee ff ff call 0xffffeecd d: 4c 89 ff mov %r15,%rdi 10: e8 c8 88 ff ff call 0xffff88dd 15: 31 ed xor %ebp,%ebp 17: eb 25 jmp 0x3e 19: e8 8f 8d 4b ff call 0xff4b8dad 1e: 48 8d 3d 58 56 04 0f lea 0xf045658(%rip),%rdi # 0xf04567d 25: 4c 89 fe mov %r15,%rsi * 28: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2d: bd fe ff ff ff mov $0xfffffffe,%ebp 32: eb 1a jmp 0x4e 34: e8 74 8d 4b ff call 0xff4b8dad 39: bd fe ff ff ff mov $0xfffffffe,%ebp