kobject: kobject_add_internal failed for qgroups (error: -12 parent: a6a605fc-d5f1-4e66-8595-3726e2b761d6) ------------[ cut here ]------------ kernfs: can not remove 'enabled', no directory WARNING: CPU: 0 PID: 15931 at fs/kernfs/dir.c:1662 kernfs_remove_by_name_ns+0x108/0x130 fs/kernfs/dir.c:1662 Modules linked in: CPU: 0 PID: 15931 Comm: syz-executor.1 Not tainted 6.7.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:kernfs_remove_by_name_ns+0x108/0x130 fs/kernfs/dir.c:1662 Code: ff e8 7c e0 70 ff bb fe ff ff ff 89 d8 5b 5d 41 5c 41 5d c3 e8 69 e0 70 ff 90 48 c7 c7 60 68 e0 8a 4c 89 e6 e8 89 06 37 ff 90 <0f> 0b 90 90 eb d1 e8 7d 86 c7 ff e9 5c ff ff ff e8 73 86 c7 ff e9 RSP: 0018:ffffc9000ece78f8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900284b1000 RDX: 0000000000040000 RSI: ffffffff814db216 RDI: 0000000000000001 RBP: ffffffff8d735dc0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000003 R12: ffffffff8b175860 R13: 0000000000000000 R14: ffffffff8b175740 R15: ffff88804a9cd7b0 FS: 0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:00000000f7fabb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007fcbf03a0eff CR3: 000000002c657000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_remove_by_name include/linux/kernfs.h:623 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:28 sysfs_remove_group+0x8b/0x180 fs/sysfs/group.c:292 sysfs_remove_groups fs/sysfs/group.c:316 [inline] sysfs_remove_groups+0x60/0xa0 fs/sysfs/group.c:308 __kobject_del+0x83/0x1e0 lib/kobject.c:592 kobject_del lib/kobject.c:624 [inline] kobject_del+0x3f/0x60 lib/kobject.c:616 btrfs_sysfs_del_qgroups fs/btrfs/sysfs.c:2321 [inline] btrfs_sysfs_del_qgroups+0x119/0x1a0 fs/btrfs/sysfs.c:2309 btrfs_sysfs_add_qgroups+0x218/0x2a0 fs/btrfs/sysfs.c:2360 btrfs_quota_enable+0x359/0x1ee0 fs/btrfs/qgroup.c:1037 btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:3705 [inline] btrfs_ioctl+0x5022/0x61e0 fs/btrfs/ioctl.c:4668 __do_compat_sys_ioctl+0x2bf/0x330 fs/ioctl.c:972 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline] __do_fast_syscall_32+0x62/0xe0 arch/x86/entry/common.c:230 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:255 entry_SYSENTER_compat_after_hwframe+0x70/0x7a RIP: 0023:0xf7fb0579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7fab5ac EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000c0109428 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi