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

Status: auto-obsoleted due to no activity on 2024/03/07 05:11
Reported-by: syzbot+4166e2c9866aa5f31202@syzkaller.appspotmail.com
First crash: 361d, last: 361d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream UBSAN: array-index-out-of-bounds in diAlloc jfs C error inconclusive 37 378d 787d 25/28 fixed on 2023/12/21 03:45
linux-6.1 UBSAN: array-index-out-of-bounds in diAlloc 4 361d 379d 0/3 auto-obsoleted due to no activity on 2024/03/07 03:48
linux-4.19 KASAN: use-after-free Read in diAlloc C error 3 737d 782d 0/1 upstream: reported C repro on 2022/10/02 23:41
linux-4.14 KASAN: use-after-free Read in diAlloc C 2 636d 782d 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:1360:19
index -878706688 is out of range for type 'atomic_t[128]'
CPU: 0 PID: 16934 Comm: syz-executor.0 Not tainted 5.15.139-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
 diAlloc+0x1459/0x1720 fs/jfs/jfs_imap.c:1360
 ialloc+0x8b/0x970 fs/jfs/jfs_inode.c:56
 jfs_create+0x1ba/0xbb0 fs/jfs/namei.c:92
 lookup_open fs/namei.c:3392 [inline]
 open_last_lookups fs/namei.c:3462 [inline]
 path_openat+0x12f6/0x2f20 fs/namei.c:3669
 do_filp_open+0x21c/0x460 fs/namei.c:3699
 do_sys_openat2+0x13b/0x500 fs/open.c:1211
 do_sys_open fs/open.c:1227 [inline]
 __do_sys_openat fs/open.c:1243 [inline]
 __se_sys_openat fs/open.c:1238 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1238
 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+0x61/0xcb
RIP: 0033:0x7f61449bcae9
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:00007f6142f3e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f6144adbf80 RCX: 00007f61449bcae9
RDX: 000000000000275a RSI: 00000000200010c0 RDI: ffffffffffffff9c
RBP: 00007f6144a0847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6144adbf80 R15: 00007ffd84860068
 </TASK>
================================================================================

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/28 03:56 linux-5.15.y 2a910f4af54d 7ec6c044 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan UBSAN: array-index-out-of-bounds in diAlloc
2023/11/28 05:10 linux-5.15.y 2a910f4af54d 7ec6c044 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in diAlloc
2023/11/28 04:57 linux-5.15.y 2a910f4af54d 7ec6c044 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 UBSAN: array-index-out-of-bounds in diAlloc
* Struck through repros no longer work on HEAD.