Messages in this thread | | | Date | Mon, 24 Oct 2022 20:07:40 -0700 | Subject | [syzbot] UBSAN: shift-out-of-bounds in jfs_statfs | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 247f34f7b803 Linux 6.1-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11904f2c880000 kernel config: https://syzkaller.appspot.com/x/.config?x=1d3548a4365ba17d dashboard link: https://syzkaller.appspot.com/bug?extid=3424c9550a49659f1704 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a5f39164dea4/disk-247f34f7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8d1b92f5a01f/vmlinux-247f34f7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3424c9550a49659f1704@syzkaller.appspotmail.com
================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/super.c:140:14 shift exponent -236023038 is negative CPU: 0 PID: 3985 Comm: syz-executor.4 Not tainted 6.1.0-rc2-syzkaller #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_shift_out_of_bounds+0x33d/0x3b0 lib/ubsan.c:322 jfs_statfs+0x503/0x510 fs/jfs/super.c:140 statfs_by_dentry fs/statfs.c:66 [inline] vfs_statfs+0x136/0x310 fs/statfs.c:90 user_statfs fs/statfs.c:105 [inline] __do_sys_statfs fs/statfs.c:195 [inline] __se_sys_statfs fs/statfs.c:192 [inline] __x64_sys_statfs+0x120/0x230 fs/statfs.c:192 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: 0033:0x7f96a5a8b5f9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f96a6bce168 EFLAGS: 00000246 ORIG_RAX: 0000000000000089 RAX: ffffffffffffffda RBX: 00007f96a5babf80 RCX: 00007f96a5a8b5f9 RDX: 0000000000000000 RSI: 0000000020005380 RDI: 0000000020005340 RBP: 00007f96a5ae67b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff54f044bf R14: 00007f96a6bce300 R15: 0000000000022000 </TASK> ================================================================================
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