syzbot


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

Status: upstream: reported C repro on 2022/09/27 11:45
Reported-by: syzbot+79d792676d8ac050949f@syzkaller.appspotmail.com
First crash: 61d, last: 7d19h

Cause bisection: failed (bisect log)
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Read in diAlloc C error 3 10d 55d 0/1 upstream: reported C repro on 2022/10/02 23:41
linux-4.14 KASAN: use-after-free Read in diAlloc C 2 13d 54d 0/1 upstream: reported C repro on 2022/10/03 09:45

Sample crash report:
loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:1359:54
index 65535 is out of range for type 'atomic_t [128]'
CPU: 0 PID: 3612 Comm: syz-executor358 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 ubsan_epilogue+0xb/0x50 lib/ubsan.c:151
 __ubsan_handle_out_of_bounds.cold+0x62/0x6c lib/ubsan.c:283
 diAlloc+0x1493/0x1730 fs/jfs/jfs_imap.c:1359
 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56
 jfs_create+0x1ea/0xac0 fs/jfs/namei.c:92
 lookup_open.isra.0+0xf05/0x12a0 fs/namei.c:3413
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x996/0x28f0 fs/namei.c:3688
 do_filp_open+0x1b6/0x400 fs/namei.c:3718
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_open fs/open.c:1334 [inline]
 __se_sys_open fs/open.c:1330 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1330
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f624e868e99
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:00007ffeaa326dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f624e868e99
RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000200
RBP: 00007f624e828660 R08: 0000555555d3f2c0 R09: 0000000000000000
R10: 00007ffeaa326c90 R11: 0000000000000246 R12: 0000000200000004
R13: 0000000000000000 R14: 00080000000000f8 R15: 0000000000000000
 </TASK>
================================================================================

Crashes (31):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2022/10/09 09:26 upstream a6afa4199d3d aea5da89 .config log report syz C UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/03 14:00 upstream a962b54e162c feb56351 .config log report syz C UBSAN: array-index-out-of-bounds in diAlloc
ci-upstream-kasan-gce-root 2022/09/27 21:09 upstream a1375562c0a8 87840e00 .config log report syz C UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/09/26 20:59 upstream f76349cf4145 d59ba983 .config log report syz C UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/19 06:25 upstream ab290eaddc4c 5bb70014 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/19 05:12 upstream ab290eaddc4c 5bb70014 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/18 12:17 upstream 84368d882b96 5bb70014 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/18 00:01 upstream 81ac25651a62 4ba8ab94 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/16 07:38 upstream 81e7cfa3a9eb 3a127a31 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/16 04:12 upstream 81e7cfa3a9eb 3a127a31 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/15 04:25 upstream e01d50cbd6ee 97de9cfc .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/13 08:45 upstream fef7fd48922d f42ee5d8 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/12 22:06 upstream 8f2975c2bb4c f42ee5d8 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/12 13:03 upstream 8f2975c2bb4c f42ee5d8 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/12 05:27 upstream eb037f16f7e8 f42ee5d8 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/10 11:45 upstream f67dd6ce0723 b2488a87 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/10 04:58 upstream f67dd6ce0723 b2488a87 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/08 07:38 upstream 59f2f4b8a757 6feb842b .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/11/01 18:05 upstream b229b6ca5abb a1d8560a .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/27 11:48 upstream 4dc12f37a8e9 86777b7f .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/27 01:27 upstream 4dc12f37a8e9 86777b7f .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/24 20:01 upstream 247f34f7b803 faae2fda .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/22 00:18 upstream 6d36c728bc2e 63e790dd .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/21 12:34 upstream 6d36c728bc2e 63e790dd .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/18 16:46 upstream 493ffd6605b2 b31320fc .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/17 09:49 upstream 493ffd6605b2 67cb024c .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/16 02:35 upstream 493ffd6605b2 67cb024c .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/12 19:42 upstream 493ffd6605b2 16a9c9e0 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/09 13:27 upstream a6afa4199d3d aea5da89 .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci2-upstream-fs 2022/10/06 02:39 upstream 2bca25eaeba6 2c6543ad .config log report info UBSAN: array-index-out-of-bounds in diAlloc
ci-upstream-linux-next-kasan-gce-root 2022/10/20 23:27 linux-next acee3e83b493 a0fd4dab .config log report info UBSAN: array-index-out-of-bounds in diAlloc
* Struck through repros no longer work on HEAD.