UBSAN: array-index-out-of-bounds in dbAllocBits

Date	Name	Commit	Repro	Result
2026/03/08	upstream (ToT)	014441d1e4b2	C	[report] UBSAN: array-index-out-of-bounds in dbAllocBits

Date

Name

Commit

Repro

Result

2026/03/08

upstream (ToT)

014441d1e4b2

[report] UBSAN: array-index-out-of-bounds in dbAllocBits

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	UBSAN: array-index-out-of-bounds in dbAllocBits jfs	19	C	inconclusive	error	234	805d	1255d	0/29	auto-obsoleted due to no activity on 2024/03/07 21:48
linux-5.15	UBSAN: array-index-out-of-bounds in dbAllocBits origin:upstream	15	C		error	5	5d17h	1028d	0/3	upstream: reported C repro on 2023/05/19 07:30
upstream	KASAN: slab-out-of-bounds Read in dbAllocBits jfs	17	C	error	error	279	36d	672d	0/29	upstream: reported C repro on 2024/05/09 13:18
linux-6.1	UBSAN: array-index-out-of-bounds in dbAllocBits origin:upstream	15	C		error	4	61d	1028d	0/3	upstream: reported C repro on 2023/05/19 04:28
linux-4.19	KASAN: use-after-free Read in dbAllocBits	19	C		error	2	1237d	1258d	0/1	upstream: reported C repro on 2022/10/01 12:57

syz.0.17[5914]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:2257:2 index 10240 is out of range for type 's64[128]' (aka 'long long[128]') CPU: 1 PID: 5914 Comm: syz.0.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: <TASK> dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 ubsan_epilogue+0xa/0x30 lib/ubsan.c:217 __ubsan_handle_out_of_bounds+0xe3/0xf0 lib/ubsan.c:348 dbAllocBits+0xa04/0xa50 fs/jfs/jfs_dmap.c:2257 dbAllocDmap fs/jfs/jfs_dmap.c:2034 [inline] dbAllocDmapLev+0x1bd/0x3c0 fs/jfs/jfs_dmap.c:1988 dbAllocCtl+0x148/0x9b0 fs/jfs/jfs_dmap.c:1825 dbAllocAG+0x1e7/0xfe0 fs/jfs/jfs_dmap.c:1353 dbAlloc+0x5aa/0xba0 fs/jfs/jfs_dmap.c:877 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline] dtInsert+0xb13/0x5de0 fs/jfs/jfs_dtree.c:871 jfs_create+0x734/0xac0 fs/jfs/namei.c:137 lookup_open fs/namei.c:3496 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0x12a0/0x3230 fs/namei.c:3794 do_filp_open+0x1f5/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_creat fs/open.c:1514 [inline] __se_sys_creat fs/open.c:1508 [inline] __x64_sys_creat+0x90/0xb0 fs/open.c:1508 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8a5579c799 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:00007fffb9f93f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f8a55a15fa0 RCX: 00007f8a5579c799 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000580 RBP: 00007f8a55832bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8a55a15fac R14: 00007f8a55a15fa0 R15: 00007f8a55a15fa0 </TASK> ================================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/08 09:25	linux-6.6.y	4fc00fe35d46	5cb44a80	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci2-linux-6-6-kasan	UBSAN: array-index-out-of-bounds in dbAllocBits

Crashes (1):

Assets (help?)