syzbot


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

Status: auto-obsoleted due to no activity on 2024/03/15 03:21
Reported-by: syzbot+1e8cfd9e5b277fd19cf5@syzkaller.appspotmail.com
First crash: 173d, last: 149d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 UBSAN: array-index-out-of-bounds in xtTruncate 1 134d 134d 0/3 auto-obsoleted due to no activity on 2024/03/29 17:24
upstream UBSAN: array-index-out-of-bounds in xtTruncate jfs syz error 5 335d 536d 0/26 auto-obsoleted due to no activity on 2023/09/10 20:47

Sample crash report:
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_xtree.c:2304:9
index 19 is out of range for type 'xad_t[18]' (aka 'struct xad[18]')
CPU: 0 PID: 1411 Comm: syz-executor.4 Not tainted 6.1.65-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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
 xtTruncate+0x2730/0x3260 fs/jfs/jfs_xtree.c:2304
 jfs_truncate_nolock+0x184/0x380 fs/jfs/inode.c:393
 jfs_truncate+0xc7/0x140 fs/jfs/inode.c:417
 jfs_setattr+0x603/0x840 fs/jfs/file.c:119
 notify_change+0xce3/0xfc0 fs/attr.c:499
 do_truncate+0x21c/0x300 fs/open.c:65
 handle_truncate fs/namei.c:3217 [inline]
 do_open fs/namei.c:3562 [inline]
 path_openat+0x27e2/0x2e60 fs/namei.c:3715
 do_filp_open+0x230/0x480 fs/namei.c:3742
 do_sys_openat2+0x13b/0x500 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_creat fs/open.c:1410 [inline]
 __se_sys_creat fs/open.c:1404 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1404
 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: 0033:0x7f937347cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9371fdd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f937359c120 RCX: 00007f937347cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f93734c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f937359c120 R15: 00007fffb72b2ed8
 </TASK>
================================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/06 03:20 linux-6.1.y c6114c845984 858d62d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: array-index-out-of-bounds in xtTruncate
2023/11/12 07:45 linux-6.1.y fb2635ac69ab 6d6dbf8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan UBSAN: array-index-out-of-bounds in xtTruncate
* Struck through repros no longer work on HEAD.