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

Title	Replies (including bot)	Last reply
[PATCH] jfs: upper bound check of tree index in dbAllocAG	6 (6)	2025/07/28 18:14
[syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dbAllocAG	1 (3)	2025/04/23 22:10

Title

Replies (including bot)

Last reply

[PATCH] jfs: upper bound check of tree index in dbAllocAG

6 (6)

2025/07/28 18:14

[syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dbAllocAG

1 (3)

2025/04/23 22:10

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KASAN: slab-use-after-free Read in dbAllocAG jfs	19				2	785d	811d	0/29	auto-obsoleted due to no activity on 2024/09/06 03:29

Rank 🛈

upstream

KASAN: slab-use-after-free Read in dbAllocAG jfs

785d

811d

0/29

auto-obsoleted due to no activity on 2024/09/06 03:29


Created	Duration	User	Patch	Repo	Result
2025/07/12 21:09	15m	retest repro		upstream	OK log
2025/05/03 20:40	14m	retest repro		upstream	report log
2025/04/23 21:47	21m	contact@arnaud-lcm.com	patch	upstream	OK log

loop0: detected capacity change from 0 to 32768 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:1397:14 index 65877 is out of range for type 's8[1365]' (aka 'signed char[1365]') CPU: 0 UID: 0 PID: 5308 Comm: syz-executor181 Not tainted 6.15.0-rc2-syzkaller-00404-g8560697b23dc #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 lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:453 dbAllocAG+0x704/0x1130 fs/jfs/jfs_dmap.c:1397 dbAlloc+0x65c/0xcb0 fs/jfs/jfs_dmap.c:873 xtSplitUp+0x554/0x21c0 fs/jfs/jfs_xtree.c:745 xtInsert+0x5ba/0x11a0 fs/jfs/jfs_xtree.c:593 extAlloc+0xae7/0x10a0 fs/jfs/jfs_extent.c:150 jfs_get_block+0x41d/0xe60 fs/jfs/inode.c:248 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x1add/0x4540 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3422 [inline] jfs_direct_IO+0xf7/0x1e0 fs/jfs/inode.c:331 generic_file_direct_write+0x1e8/0x400 mm/filemap.c:4037 __generic_file_write_iter+0x126/0x230 mm/filemap.c:4206 generic_file_write_iter+0x10e/0x5e0 mm/filemap.c:4246 new_sync_write fs/read_write.c:591 [inline] vfs_write+0x70f/0xd10 fs/read_write.c:684 ksys_write+0x19d/0x2d0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2346650b59 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007fffd3c588a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0073746e6576652e RCX: 00007f2346650b59 RDX: 00000000fffffdaf RSI: 0000200000000000 RDI: 0000000000000005 RBP: 652e79726f6d656d R08: 00005555682c24c0 R09: 00005555682c24c0 R10: 00005555682c24c0 R11: 0000000000000206 R12: 00007fffd3c588d0 R13: 00007fffd3c58af8 R14: 431bde82d7b634db R15: 00007f234669903b </TASK> ---[ end trace ]---

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/04/19 20:12	upstream	8560697b23dc	2a20f901	.config	console log	report	syz / log	C		[disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)]	ci-snapshot-upstream-root	UBSAN: array-index-out-of-bounds in dbAllocAG

Crashes (1):

Assets (help?)