UBSAN: shift-out-of-bounds in dbFindBits (2)

Version	Stage	Reported	Report Link	Job
1	moderation	2026/05/29 14:32	Discussion	665e737f-2256-468b-a1a9-fd1d4b2ebf38

moderation

2026/05/29 14:32

Discussion

665e737f-2256-468b-a1a9-fd1d4b2ebf38

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
665e737f-2256-468b-a1a9-fd1d4b2ebf38	patching		❓	UBSAN: shift-out-of-bounds in dbFindBits (2)	2026/05/29 14:07	2026/05/29 14:07	2026/05/29 14:32	6b4a844333e83556da95d61d7f207e7ef5cd4bc6
c23bdd78-d275-4fa4-80a6-e98cd9571d4e	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	UBSAN: shift-out-of-bounds in dbFindBits (2)	2026/05/22 05:11	2026/05/22 05:11	2026/05/22 05:42	70ae9b0332c954c7a2e9754a431bc021385efca3

665e737f-2256-468b-a1a9-fd1d4b2ebf38

patching

❓

UBSAN: shift-out-of-bounds in dbFindBits (2)

2026/05/29 14:07

2026/05/29 14:32

6b4a844333e83556da95d61d7f207e7ef5cd4bc6

c23bdd78-d275-4fa4-80a6-e98cd9571d4e

assessment-security

DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌

❓

UBSAN: shift-out-of-bounds in dbFindBits (2)

2026/05/22 05:11

2026/05/22 05:42

70ae9b0332c954c7a2e9754a431bc021385efca3

Title	Replies (including bot)	Last reply
[syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbFindBits (2)	0 (2)	2025/09/28 01:00
[PATCH v4] jfs: UBSAN: shift-out-of-bounds in dbFindBits	2 (3)	2024/12/02 20:53
[PATCH v3] jfs: UBSAN: shift-out-of-bounds in dbFindBits	2 (3)	2024/10/30 15:15
Re: [syzbot] [PATCH v3] jfs: UBSAN: shift-out-of-bounds in dbFindBits	0 (1)	2024/10/25 16:30
[PATCH v2] jfs: UBSAN: shift-out-of-bounds in dbFindBits	1 (2)	2024/10/25 15:39

Title

Replies (including bot)

Last reply

[syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbFindBits (2)

0 (2)

2025/09/28 01:00

[PATCH v4] jfs: UBSAN: shift-out-of-bounds in dbFindBits

2 (3)

2024/12/02 20:53

[PATCH v3] jfs: UBSAN: shift-out-of-bounds in dbFindBits

2 (3)

2024/10/30 15:15

Re: [syzbot] [PATCH v3] jfs: UBSAN: shift-out-of-bounds in dbFindBits

0 (1)

2024/10/25 16:30

[PATCH v2] jfs: UBSAN: shift-out-of-bounds in dbFindBits

1 (2)

2024/10/25 15:39

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: shift-out-of-bounds in dbFindBits jfs	-1	C	error		53	619d	722d	28/29	fixed on 2024/10/22 11:57

Rank 🛈

upstream

UBSAN: shift-out-of-bounds in dbFindBits jfs

-1

error

619d

722d

28/29

fixed on 2024/10/22 11:57


Created	Duration	User	Patch	Repo	Result
2026/05/11 17:09	21m	retest repro		upstream	error
2026/03/08 20:05	18m	retest repro		upstream	error
2026/02/15 02:27	16m	retest repro		upstream	log
2026/01/15 06:43	20m	retest repro		upstream	OK log
2025/12/28 19:41	16m	retest repro		upstream	report log
2025/12/07 02:07	16m	retest repro		upstream	report log
2025/11/06 06:23	14m	retest repro		upstream	report log
2025/10/19 19:10	14m	retest repro		upstream	report log
2025/09/28 01:00	14m	xandfury@gmail.com		upstream	report log
2025/09/11 06:57	14m	retest repro		upstream	report log
2025/08/28 06:07	14m	retest repro		upstream	report log
2024/11/01 10:00	19m	zoo868e@gmail.com	patch	upstream	OK log
2024/10/25 17:00	19m	zoo868e@gmail.com	patch	upstream	OK log
2024/10/25 16:30	19m	zoo868e@gmail.com	patch	upstream	OK log
2024/10/25 15:25	13m	zoo868e@gmail.com	patch	upstream	report log

ERROR: (device loop0): dbAdjCtl: Corrupt dmapctl page ERROR: (device loop0): remounting filesystem as read-only ERROR: (device loop0): dbDiscardAG: -EIO ERROR: (device loop0): dbAllocBits: leaf page corrupt ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:3031:55 shift exponent 32 is too large for 32-bit type 'u32' (aka 'unsigned int') CPU: 0 UID: 0 PID: 5506 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 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233 __ubsan_handle_shift_out_of_bounds+0x386/0x410 lib/ubsan.c:494 dbFindBits+0xdf/0x1a0 fs/jfs/jfs_dmap.c:3031 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1985 dbAllocCtl+0x14a/0x9c0 fs/jfs/jfs_dmap.c:1825 dbAllocAG+0x1e6/0xff0 fs/jfs/jfs_dmap.c:1353 dbDiscardAG+0x2df/0x900 fs/jfs/jfs_dmap.c:1608 jfs_ioc_trim+0x429/0x690 fs/jfs/jfs_discard.c:106 jfs_ioctl+0x2b5/0x3d0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffab7b8eec9 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:00007ffdab0c6f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffab7de5fa0 RCX: 00007ffab7b8eec9 RDX: 00002000000000c0 RSI: 00000000c0185879 RDI: 0000000000000004 RBP: 00007ffab7c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffab7de5fa0 R14: 00007ffab7de5fa0 R15: 0000000000000003 </TASK> ---[ end trace ]---

Crashes (181):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Assets (help?)	Manager	Title
2025/10/05 18:42	upstream	6093a688a07d	49379ee0	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2025/02/01 07:56	upstream	69e858e0b8b2	aa47157c	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/29 15:04	upstream	dc59e4fea9d8	6a0c72dc	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/24 08:52	upstream	f31c00c377cc	042555ff	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/23 05:11	upstream	4708cac0e22c	5a630be6	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/22 01:41	upstream	8cd8cf7a07e5	43bfcdb0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/20 18:52	upstream	1a3746ccbb0a	43bfcdb0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/20 11:09	upstream	a975094bf98c	43bfcdb0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/20 05:59	upstream	a975094bf98c	43bfcdb0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/20 02:04	upstream	a975094bf98c	43bfcdb0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/19 07:23	upstream	83f1454877cc	d7ffd47b	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/18 16:49	upstream	e771677c937d	a776b0d0	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/17 07:44	upstream	6b5a2b7d9bc1	62cc6db3	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/17 02:15	upstream	6b5a2b7d9bc1	62cc6db3	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/14 07:47	upstream	2b07ea76fd28	4f06757f	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/13 11:41	upstream	1dadb7e7eb5a	4f06757f	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/12 07:07	upstream	2b414a95b8f7	e93da63e	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/10 09:54	upstream	685441a6d3f1	34dab4be	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/09 21:42	upstream	2d3090a8aeb5	c36c07f6	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/09 16:13	upstream	2d3090a8aeb5	c36c07f6	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/05 13:32	upstream	ddd664bbff63	48b6c3fa	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/04 10:16	upstream	ba3e43a9e601	197909be	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/04 06:38	upstream	ba3e43a9e601	197909be	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/06/03 10:20	upstream	ba3e43a9e601	3c0d2131	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/31 15:22	upstream	174914ea5513	6b4a8443	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/31 05:13	upstream	174914ea5513	6b4a8443	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/30 05:27	upstream	9215e74f228f	6b4a8443	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/27 19:46	upstream	eb3f4b7426cf	cb4e87ff	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/26 22:37	upstream	d60ec36cab33	2b01f00e	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/25 16:12	upstream	e7ae89a0c97c	c69befb3	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/24 02:05	upstream	79bd2dded182	c69befb3	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/22 00:41	upstream	758c807bb943	70ae9b03	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/21 14:41	upstream	8bc67e4db64a	747d777d	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/19 14:23	upstream	ab5fce87a778	2aa09d96	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/17 17:00	upstream	6916d5703ddf	de5aae85	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/17 14:48	upstream	6916d5703ddf	de5aae85	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/17 12:00	upstream	6916d5703ddf	de5aae85	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/16 15:06	upstream	6916d5703ddf	a15a64a6	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/05/13 03:59	upstream	c21b90f77687	a0949470	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/04/27 16:34	upstream	254f49634ee1	0f700595	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/04/26 08:13	upstream	897d54018cc9	9c2d0995	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/04/26 06:55	upstream	897d54018cc9	9c2d0995	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/04/20 22:34	upstream	c1f49dea2b8f	e65da4ee	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2026/04/14 07:27	upstream	26ff969926a0	1a086e7c	.config	console log	report			[disk image (non-bootable)] [vmlinux] [kernel image]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits
2024/10/22 13:13	upstream	c2ee9f594da8	a93682b3	.config	console log	report	syz / log	C	[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro]	ci-snapshot-upstream-root	UBSAN: shift-out-of-bounds in dbFindBits

Crashes (181):

Assets (help?)

2025/10/05 18:42

upstream