kernel BUG in btrfs_qgroup

Title	Replies (including bot)	Last reply
[PATCH] btrfs: Optimize the timing of prealloc memory allocation	2 (2)	2025/12/08 20:19
[syzbot] [btrfs?] kernel BUG in btrfs_qgroup_inherit	1 (3)	2025/12/08 11:06

Created	Duration	User	Patch	Repo	Result
2025/12/08 10:50	14m	eadavis@qq.com	patch	upstream	report log

Created

Duration

User

Patch

Repo

Result

2025/12/08 10:50

14m

eadavis@qq.com

patch

upstream

report log

R13: 00007f24f59e5fa0 R14: 00007f24f59e5fa0 R15: 0000000000000003 </TASK> assertion failed: prealloc == NULL :: 0, in fs/btrfs/qgroup.c:3529 ------------[ cut here ]------------ kernel BUG at fs/btrfs/qgroup.c:3529! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5562 Comm: syz.0.19 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:btrfs_qgroup_inherit+0x2892/0x28a0 fs/btrfs/qgroup.c:3529 Code: ff ff e8 d1 1f d4 fd 48 c7 c7 a0 e5 b0 8b 48 c7 c6 00 e6 b0 8b 31 d2 48 c7 c1 20 e2 b0 8b 41 b8 c9 0d 00 00 e8 ef 58 3a fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000cbe7740 EFLAGS: 00010246 RAX: 0000000000000042 RBX: 0000000000000000 RCX: b3bb6c739819f900 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000cbe7990 R08: ffffc9000cbe7467 R09: 1ffff9200197ce8c R10: dffffc0000000000 R11: fffff5200197ce8d R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000fffffff4 FS: 0000555588ca7500(0000) GS:ffff88808d679000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b63fff CR3: 0000000011fab000 CR4: 0000000000352ef0 Call Trace: <TASK> create_subvol+0x5ad/0x18f0 fs/btrfs/ioctl.c:570 btrfs_mksubvol+0x6e4/0x12c0 fs/btrfs/ioctl.c:928 __btrfs_ioctl_snap_create+0x2b2/0x730 fs/btrfs/ioctl.c:1201 btrfs_ioctl_snap_create+0x131/0x180 fs/btrfs/ioctl.c:1259 btrfs_ioctl+0xb4d/0xd00 fs/btrfs/ioctl.c:-1 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: 0033:0x7f24f578f7c9 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:00007ffc9b4adc18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f24f59e5fa0 RCX: 00007f24f578f7c9 RDX: 0000200000000280 RSI: 000000005000940e RDI: 0000000000000003 RBP: 00007ffc9b4adc70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f24f59e5fa0 R14: 00007f24f59e5fa0 R15: 0000000000000003 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_qgroup_inherit+0x2892/0x28a0 fs/btrfs/qgroup.c:3529 Code: ff ff e8 d1 1f d4 fd 48 c7 c7 a0 e5 b0 8b 48 c7 c6 00 e6 b0 8b 31 d2 48 c7 c1 20 e2 b0 8b 41 b8 c9 0d 00 00 e8 ef 58 3a fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000cbe7740 EFLAGS: 00010246 RAX: 0000000000000042 RBX: 0000000000000000 RCX: b3bb6c739819f900 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000cbe7990 R08: ffffc9000cbe7467 R09: 1ffff9200197ce8c R10: dffffc0000000000 R11: fffff5200197ce8d R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000fffffff4 FS: 0000555588ca7500(0000) GS:ffff88808d679000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b63fff CR3: 0000000011fab000 CR4: 0000000000352ef0

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Assets (help?)	Manager	Title
2025/12/06 16:08	upstream	416f99c3b16f	d1b870e1	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)]	ci-snapshot-upstream-root	kernel BUG in btrfs_qgroup_inherit
2025/12/13 00:21	upstream	187d0801404f	d1b870e1	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in btrfs_qgroup_inherit
2025/12/06 19:04	upstream	416f99c3b16f	d1b870e1	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in btrfs_qgroup_inherit
2025/12/06 15:38	upstream	416f99c3b16f	d1b870e1	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in btrfs_qgroup_inherit

Crashes (4):

Assets (help?)