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

Date	Name	Commit	Repro	Result
2025/03/10	upstream (ToT)	80e54e84911a	C	[report] UBSAN: shift-out-of-bounds in dbSplit

Date

Name

Commit

Repro

Result

2025/03/10

upstream (ToT)

80e54e84911a

[report] UBSAN: shift-out-of-bounds in dbSplit

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	UBSAN: shift-out-of-bounds in dbSplit	C		done	18	137d	353d	3/3	fixed on 2025/01/09 09:39
upstream	UBSAN: shift-out-of-bounds in dbSplit (2) jfs	C	error		403	122d	368d	28/28	fixed on 2024/12/16 09:50
upstream	UBSAN: shift-out-of-bounds in dbSplit jfs	C	error	done	7	459d	913d	25/28	fixed on 2024/02/09 18:10
linux-5.15	UBSAN: shift-out-of-bounds in dbSplit origin:upstream	C		error	36	10d	353d	0/3	upstream: reported C repro on 2024/04/15 22:09

loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:2644:11 shift exponent 121 is too large for 32-bit type 'int' CPU: 0 PID: 4245 Comm: syz-executor460 Not tainted 6.1.130-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_shift_out_of_bounds+0x3bf/0x420 lib/ubsan.c:321 dbSplit+0x21a/0x220 fs/jfs/jfs_dmap.c:2644 dbAllocBits+0x4e0/0x9f0 fs/jfs/jfs_dmap.c:2196 dbAllocDmap fs/jfs/jfs_dmap.c:2037 [inline] dbAllocDmapLev+0x24c/0x490 fs/jfs/jfs_dmap.c:1991 dbAllocCtl+0x147/0x9a0 fs/jfs/jfs_dmap.c:1828 dbAllocAG+0x28b/0x10b0 fs/jfs/jfs_dmap.c:1364 dbAlloc+0x654/0xc90 fs/jfs/jfs_dmap.c:888 dtSplitUp fs/jfs/jfs_dtree.c:981 [inline] dtInsert+0xd76/0x6c80 fs/jfs/jfs_dtree.c:870 jfs_create+0x7b2/0xbb0 fs/jfs/namei.c:137 lookup_open fs/namei.c:3482 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x12f1/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 do_sys_openat2+0x13b/0x4f0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_open fs/open.c:1342 [inline] __se_sys_open fs/open.c:1338 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1338 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7faea8b329b9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffa733f838 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 633d73726f727265 RCX: 00007faea8b329b9 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000400000000400 RBP: 00007faea8bab610 R08: 00000000000060cc R09: 0000000000000000 R10: 00007fffa733f700 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffa733fa08 R14: 0000000000000001 R15: 0000000000000001 </TASK> ================================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/03/09 22:23	linux-6.1.y	6ae7ac5c4251	163f510d	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci2-linux-6-1-kasan	UBSAN: shift-out-of-bounds in dbSplit

Crashes (1):

Assets (help?)