syzbot


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

Status: upstream: reported C repro on 2022/10/21 04:45
Reported-by: syzbot+c1056fdfe414463fdb33@syzkaller.appspotmail.com
First crash: 39d, last: 30d

Cause bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Write in diWrite syz error 2 41d 41d 0/1 upstream: reported syz repro on 2022/10/19 03:08

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