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

Status: fixed on 2024/01/30 15:47
Subsystems: jfs
[Documentation on labels]
Reported-by: syzbot+c1056fdfe414463fdb33@syzkaller.appspotmail.com
Fix commit: 6f861765464f fs: Block writes to mounted block devices
First crash: 1375d, last: 955d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: fixed by (bisect log) :
commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@suse.cz>
Date: Wed Nov 1 17:43:10 2023 +0000

  fs: Block writes to mounted block devices

  
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[syzbot] UBSAN: array-index-out-of-bounds in diWrite 2 (8) 2024/01/15 14:12
[PATCH] jfs : fix array-index-out-of-bounds in diWrite 3 (3) 2023/11/01 15:04
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-out-of-bounds Write in diWrite jfs 22 C inconclusive error 53 112d 822d 0/29 upstream: reported C repro on 2024/04/25 21:10
linux-4.19 KASAN: use-after-free Write in diWrite 22 syz error 2 1377d 1377d 0/1 upstream: reported syz repro on 2022/10/19 03:08
linux-5.15 KASAN: use-after-free Write in diWrite origin:upstream 22 C done 22 362d 674d 3/3 fixed on 2025/09/09 18:30
linux-6.1 KASAN: slab-out-of-bounds Write in diWrite origin:upstream 22 C error 43 14d 533d 0/3 upstream: reported C repro on 2025/02/08 22:36
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2023/11/03 07:29 9m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/11/03 07:18 6m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master error
2023/11/03 03:12 14m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/11/02 15:02 1h15m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/11/02 11:34 1h03m ghandatmanas@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/10/07 06:11 16m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2023/10/04 14:33 10m ghandatmanas@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/09/05 10:30 13m retest repro upstream report log
▶ ▼ Fix bisection attempts (10)
Created Duration User Patch Repo Result
2024/01/14 02:39 4h38m bisect fix upstream OK (1) job log
2023/12/14 22:15 1h15m bisect fix upstream OK (0) job log log
2023/11/14 02:12 1h37m bisect fix upstream OK (0) job log log
2023/10/11 10:06 1h08m bisect fix upstream OK (0) job log log
2023/06/27 06:51 55m bisect fix upstream OK (0) job log log
2023/05/26 20:50 47m bisect fix upstream OK (0) job log log
2023/04/21 22:57 1h10m bisect fix upstream OK (0) job log log
2023/03/22 03:52 37m bisect fix upstream OK (0) job log log
2023/02/20 02:47 46m bisect fix upstream OK (0) job log log
2023/01/21 01:55 43m bisect fix upstream OK (0) job log log

Sample crash report:
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:749:4
index 255 is out of range for type 'struct dtslot [128]'
CPU: 1 PID: 3606 Comm: syz-executor322 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:151 [inline]
 __ubsan_handle_out_of_bounds+0xdb/0x130 lib/ubsan.c:283
 diWrite+0x1311/0x1f80 fs/jfs/jfs_imap.c:749
 txCommit+0xa2e/0x6d40 fs/jfs/jfs_txnmgr.c:1250
 jfs_mkdir+0x911/0xb00 fs/jfs/namei.c:290
 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013
 do_mkdirat+0x279/0x550 fs/namei.c:4038
 __do_sys_mkdirat fs/namei.c:4053 [inline]
 __se_sys_mkdirat fs/namei.c:4051 [inline]
 __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4051
 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: 0033:0x7f1a977dfe49
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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd8f230c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1a977dfe49
RDX: 00000000000001ff RSI: 00000000200000c0 RDI: ffffffffffffff9c
RBP: 00007f1a9779f610 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555566302c0 R11: 0000000000000246 R12: 00000000f8008000
R13: 0000000000000000 R14: 00083878000000fc R15: 0000000000000000
 </TASK>
================================================================================

Crashes (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/10/21 02:46 upstream 493ffd6605b2 a0fd4dab .config strace log report syz C [disk image] [vmlinux] [mounted in repro] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/30 01:45 upstream b229b6ca5abb 2a71366b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/23 10:54 upstream 4da34b7d175d c0b80a55 .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/23 10:52 upstream d47136c28015 c0b80a55 .config console log report info ci-upstream-kasan-gce-smack-root UBSAN: array-index-out-of-bounds in diWrite
2022/10/22 01:51 upstream 6d36c728bc2e 63e790dd .config console log report info ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 20:16 upstream e35184f32151 4bfd3c27 .config console log report info ci-upstream-kasan-gce-smack-root UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 16:19 upstream 6d36c728bc2e 63e790dd .config console log report info ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 15:27 upstream 6d36c728bc2e 63e790dd .config console log report info ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 09:54 upstream 6d36c728bc2e 63e790dd .config console log report info ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 02:37 upstream 493ffd6605b2 a0fd4dab .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/21 02:14 upstream 493ffd6605b2 a0fd4dab .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/20 17:05 upstream 493ffd6605b2 b31320fc .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
2022/10/20 15:26 upstream 493ffd6605b2 b31320fc .config console log report info [disk image] [vmlinux] ci2-upstream-fs UBSAN: array-index-out-of-bounds in diWrite
* Struck through repros no longer work on HEAD.