public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
* [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in diNewExt
@ 2023-12-10  6:40 syzbot
  2023-12-10  7:24 ` syzbot
                   ` (3 more replies)
  0 siblings, 4 replies; 10+ messages in thread
From: syzbot @ 2023-12-10  6:40 UTC (permalink / raw)
  To: jfs-discussion, linux-fsdevel, linux-kernel, shaggy,
	syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    bee0e7762ad2 Merge tag 'for-linus-iommufd' of git://git.ke..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1088351ce80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b45dfd882e46ec91
dashboard link: https://syzkaller.appspot.com/bug?extid=553d90297e6d2f50dbc7
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=122acc3ce80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=110a49b4e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/af357ba4767f/disk-bee0e776.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ae4d50206171/vmlinux-bee0e776.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e12203376a9f/bzImage-bee0e776.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/d8974c833f6f/mount_0.gz

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=133caf54e80000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10bcaf54e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=173caf54e80000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+553d90297e6d2f50dbc7@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_imap.c:2360:2
index -878706688 is out of range for type 'struct iagctl[128]'
CPU: 1 PID: 5065 Comm: syz-executor282 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #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+0x1e7/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348
 diNewExt+0x3cf3/0x4000 fs/jfs/jfs_imap.c:2360
 diAllocExt fs/jfs/jfs_imap.c:1949 [inline]
 diAllocAG+0xbe8/0x1e50 fs/jfs/jfs_imap.c:1666
 diAlloc+0x1d3/0x1760 fs/jfs/jfs_imap.c:1587
 ialloc+0x8f/0x900 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1c5/0xb90 fs/jfs/namei.c:225
 vfs_mkdir+0x2f1/0x4b0 fs/namei.c:4106
 do_mkdirat+0x264/0x3a0 fs/namei.c:4129
 __do_sys_mkdir fs/namei.c:4149 [inline]
 __se_sys_mkdir fs/namei.c:4147 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4147
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fcb7e6a0b57
Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd83023038 EFLAGS: 00000286 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fcb7e6a0b57
RDX: 00000000000a1020 RSI: 00000000000001ff RDI: 0000000020000140
RBP: 0000000020000140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000286 R12: 00007ffd830230d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
================================================================================


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

^ permalink raw reply	[flat|nested] 10+ messages in thread
[parent not found: <tencent_B4064DC995AEF2AEC3CC9E27EE06ED12D706@qq.com>]
[parent not found: <tencent_996A377566D793682361297D63A5244B3705@qq.com>]
[parent not found: <tencent_5FBE6E042F496EB89494EB7AED4ECD84780A@qq.com>]
end of thread, other threads:[~2024-01-02 17:10 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-12-10  6:40 [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in diNewExt syzbot
2023-12-10  7:24 ` syzbot
2023-12-11 12:30 ` syzbot
2023-12-12  0:30 ` syzbot
     [not found] ` <tencent_B86ECD2ECECC92A7ED86EF92D0064A499206@qq.com>
2023-12-20 20:02   ` [PATCH] jfs: fix " Dave Kleikamp
2024-01-02 13:29   ` Dan Carpenter
2024-01-02 17:10     ` Dave Kleikamp
     [not found] <tencent_B4064DC995AEF2AEC3CC9E27EE06ED12D706@qq.com>
2023-12-10  7:36 ` [syzbot] [jfs?] UBSAN: " syzbot
     [not found] <tencent_996A377566D793682361297D63A5244B3705@qq.com>
2023-12-11 12:50 ` syzbot
     [not found] <tencent_5FBE6E042F496EB89494EB7AED4ECD84780A@qq.com>
2023-12-12  1:04 ` syzbot

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox