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

Status: auto-obsoleted due to no activity on 2023/10/14 03:47
Reported-by: syzbot+07bc361486c2f9420c7a@syzkaller.appspotmail.com
First crash: 1121d, last: 1121d
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: array-index-out-of-bounds in txCommit jfs 15 syz, C error done 396 1002d 1383d 25/29 fixed on 2024/01/08 11:23
linux-5.15 UBSAN: array-index-out-of-bounds in txCommit 15 1 1190d 1190d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:03
linux-5.15 UBSAN: array-index-out-of-bounds in txCommit (2) origin:lts-only 15 syz, C unreliable 125 463d 990d 0/3 auto-obsoleted due to no activity on 2025/07/03 17:10
linux-6.1 UBSAN: array-index-out-of-bounds in txCommit (2) origin:lts-only 15 syz, C done 152 463d 999d 3/3 fixed on 2025/05/02 07:04
upstream general protection fault in txCommit (2) prio:high jfs 19 syz, C error error 28 114d 266d 0/29 upstream: reported C repro on 2025/11/07 07:29
upstream general protection fault in txCommit jfs 2 1 716d 712d 0/29 auto-obsoleted due to no activity on 2024/11/12 17:04

Sample crash report:
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_txnmgr.c:1738:5
index 18 is out of range for type 'xad_t[18]' (aka 'struct xad[18]')
CPU: 0 PID: 10873 Comm: syz-executor.5 Not tainted 6.1.37-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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_out_of_bounds+0x118/0x140 lib/ubsan.c:282
 xtLog fs/jfs/jfs_txnmgr.c:1738 [inline]
 txLog fs/jfs/jfs_txnmgr.c:1391 [inline]
 txCommit+0x3f07/0x6ba0 fs/jfs/jfs_txnmgr.c:1259
 jfs_commit_inode+0x362/0x580 fs/jfs/inode.c:108
 extAlloc+0xc94/0x1010 fs/jfs/jfs_extent.c:172
 jfs_get_block+0x417/0xe50 fs/jfs/inode.c:248
 get_more_blocks fs/direct-io.c:665 [inline]
 do_direct_IO fs/direct-io.c:953 [inline]
 __blockdev_direct_IO+0x1ba3/0x4340 fs/direct-io.c:1266
 blockdev_direct_IO include/linux/fs.h:3228 [inline]
 jfs_direct_IO+0xf6/0x1e0 fs/jfs/inode.c:336
 generic_file_direct_write+0x204/0x460 mm/filemap.c:3678
 __generic_file_write_iter+0x1c4/0x400 mm/filemap.c:3838
 generic_file_write_iter+0xab/0x310 mm/filemap.c:3914
 do_iter_write+0x6e6/0xc50 fs/read_write.c:861
 iter_file_splice_write+0x806/0xfa0 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0xe3/0x1c0 fs/splice.c:931
 splice_direct_to_actor+0x4c0/0xbd0 fs/splice.c:886
 do_splice_direct+0x27f/0x3c0 fs/splice.c:974
 do_sendfile+0x61c/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc7e188c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fc7d8fdd168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fc7e19ac050 RCX: 00007fc7e188c389
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007fc7e18d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdedf7592f R14: 00007fc7d8fdd300 R15: 0000000000022000
 </TASK>
================================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/06 03:46 linux-6.1.y 0f4ac6b4c5f0 ba5dba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: array-index-out-of-bounds in txCommit
* Struck through repros no longer work on HEAD.