kernel BUG in dtSplitRoot

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
3f7cccb3-ffa3-4aa0-a76a-6736efdb0f94	assessment-security	DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ✅ VMHostTrigger: ❌	❓	kernel BUG in dtSplitRoot	2026/05/31 13:53	2026/05/31 13:53	2026/05/31 14:58	6b4a844333e83556da95d61d7f207e7ef5cd4bc6
b296248f-d0ef-4340-aadb-2965531c1f34	assessment-security		💥	kernel BUG in dtSplitRoot	2026/05/14 17:04	2026/05/14 17:04	2026/05/14 17:05	6ccb967e465e832a7bfd7a116ad00d52a0923a5d	failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128 From /app/workdir/repo/linux * branch HEAD -> FETCH_HEAD Updating files: ... truncated to first 200 bytes; open job for full error

Title	Replies (including bot)	Last reply
[PATCH] jfs: fix directory tree corruption in dtSplitRoot()	1 (1)	2025/12/07 06:58
[PATCH] jfs: fix directory tree corruption in dtSplitRoot()	2 (2)	2025/12/07 06:55
[syzbot] [jfs?] kernel BUG in dtSplitRoot	0 (4)	2025/12/07 06:05

Title

Replies (including bot)

Last reply

[PATCH] jfs: fix directory tree corruption in dtSplitRoot()

1 (1)

2025/12/07 06:58

[PATCH] jfs: fix directory tree corruption in dtSplitRoot()

2 (2)

2025/12/07 06:55

[syzbot] [jfs?] kernel BUG in dtSplitRoot

0 (4)

2025/12/07 06:05

Created	Duration	User	Patch	Repo	Result
2026/05/09 19:12	22m	retest repro		upstream	error
2026/02/28 18:10	9m	retest repro		upstream	report log
2025/12/16 10:25	15m	retest repro		upstream	report log
2025/12/07 06:05	17m	kartikey406@gmail.com	patch	upstream	report log
2025/12/07 05:21	20m	kartikey406@gmail.com	patch	upstream	report log
2025/12/07 04:57	16m	kartikey406@gmail.com	patch	upstream	report log

Created

Duration

User

Patch

Repo

Result

2026/05/09 19:12

22m

retest repro

upstream

error

2026/02/28 18:10

retest repro

upstream

report log

2025/12/16 10:25

15m

retest repro

upstream

report log

2025/12/07 06:05

17m

kartikey406@gmail.com

patch

upstream

report log

2025/12/07 05:21

20m

kartikey406@gmail.com

patch

upstream

report log

2025/12/07 04:57

16m

kartikey406@gmail.com

patch

upstream

report log

UFO tlock:0xffffc9000152d5e8 BUG at fs/jfs/jfs_dtree.c:1942 assert(dtlck->index == 0) ------------[ cut here ]------------ kernel BUG at fs/jfs/jfs_dtree.c:1942! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5663 Comm: syz.0.17 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:dtSplitRoot+0x1694/0x16c0 fs/jfs/jfs_dtree.c:1942 Code: e9 49 f3 ff ff e8 2c fc 77 fe 48 c7 c7 e0 88 a4 8b 48 c7 c6 c0 87 a4 8b ba 96 07 00 00 48 c7 c1 60 89 a4 8b e8 3d 01 df fd 90 <0f> 0b e8 05 fc 77 fe 48 c7 c7 e0 88 a4 8b 48 c7 c6 c0 87 a4 8b ba RSP: 0018:ffffc9000d2972a8 EFLAGS: 00010246 RAX: 0000000000000038 RBX: 0000000000001000 RCX: c529552525a5ed00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000152d6db R08: ffff88801fe24253 R09: 1ffff11003fc484a R10: dffffc0000000000 R11: ffffed1003fc484b R12: dffffc0000000000 R13: 1ffff920002a5adb R14: 0000000000000002 R15: ffffc9000152d6c0 FS: 0000555582889500(0000) GS:ffff88808d722000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe1757d0e9c CR3: 000000004fc9e000 CR4: 0000000000352ef0 Call Trace: <TASK> dtSplitUp fs/jfs/jfs_dtree.c:1244 [inline] dtInsert+0x2525/0x5f40 fs/jfs/jfs_dtree.c:871 jfs_create+0x6c8/0xa80 fs/jfs/namei.c:137 lookup_open fs/namei.c:3866 [inline] open_last_lookups fs/namei.c:3965 [inline] path_openat+0x188f/0x3b80 fs/namei.c:4201 do_filp_open+0x1fa/0x410 fs/namei.c:4231 do_sys_openat2+0x121/0x1c0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1530 [inline] __se_sys_creat fs/open.c:1524 [inline] __x64_sys_creat+0x8f/0xc0 fs/open.c:1524 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f94e718f7c9 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:00007ffe798e7728 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f94e73e5fa0 RCX: 00007f94e718f7c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000580 RBP: 00007f94e7213f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f94e73e5fa0 R14: 00007f94e73e5fa0 R15: 0000000000000002 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtSplitRoot+0x1694/0x16c0 fs/jfs/jfs_dtree.c:1942 Code: e9 49 f3 ff ff e8 2c fc 77 fe 48 c7 c7 e0 88 a4 8b 48 c7 c6 c0 87 a4 8b ba 96 07 00 00 48 c7 c1 60 89 a4 8b e8 3d 01 df fd 90 <0f> 0b e8 05 fc 77 fe 48 c7 c7 e0 88 a4 8b 48 c7 c6 c0 87 a4 8b ba RSP: 0018:ffffc9000d2972a8 EFLAGS: 00010246 RAX: 0000000000000038 RBX: 0000000000001000 RCX: c529552525a5ed00 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000152d6db R08: ffff88801fe24253 R09: 1ffff11003fc484a R10: dffffc0000000000 R11: ffffed1003fc484b R12: dffffc0000000000 R13: 1ffff920002a5adb R14: 0000000000000002 R15: ffffc9000152d6c0 FS: 0000555582889500(0000) GS:ffff88808d722000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2ca51ff000 CR3: 000000004fc9e000 CR4: 0000000000352ef0

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Assets (help?)	Manager	Title
2025/12/02 10:21	upstream	1d18101a644e	d1b870e1	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci-snapshot-upstream-root	kernel BUG in dtSplitRoot
2026/02/14 17:55	upstream	770aaedb461a	1e62d198	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in dtSplitRoot
2026/01/06 19:03	upstream	54e82e93ca93	d1b870e1	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in dtSplitRoot
2025/12/02 08:32	upstream	1d18101a644e	d1b870e1	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	kernel BUG in dtSplitRoot

Crashes (4):

Assets (help?)