Messages in this thread | | | Date | Tue, 27 Sep 2022 14:49:55 -0700 | Subject | Re: [syzbot] UBSAN: shift-out-of-bounds in jfs_open | From | syzbot <> |
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syzbot has found a reproducer for the following issue on:
HEAD commit: 3800a713b607 Merge tag 'mm-hotfixes-stable-2022-09-26' of .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1073ecd4880000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba0d23aa7e1ffaf5 dashboard link: https://syzkaller.appspot.com/bug?extid=027aa1f5f8487ba60a97 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=103ceaa8880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=125bd024880000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+027aa1f5f8487ba60a97@syzkaller.appspotmail.com
================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/file.c:65:20 shift exponent 8205 is too large for 64-bit type '__u64' (aka 'unsigned long long') CPU: 1 PID: 3690 Comm: syz-executor342 Not tainted 6.0.0-rc7-syzkaller-00029-g3800a713b607 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 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_open+0x3a2/0x3d0 fs/jfs/file.c:65 do_dentry_open+0x777/0x1180 fs/open.c:880 do_open fs/namei.c:3557 [inline] path_openat+0x25fc/0x2df0 fs/namei.c:3691 do_filp_open+0x264/0x4f0 fs/namei.c:3718 do_sys_openat2+0x124/0x4e0 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_openat fs/open.c:1345 [inline] __se_sys_openat fs/open.c:1340 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1340 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: 0033:0x7f2044cd6ed9 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:00007f2044c4c278 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f2044d624b0 RCX: 00007f2044cd6ed9 RDX: 0000000000161842 RSI: 000000002000c380 RDI: 00000000ffffff9c RBP: 00007f2044d2de4c R08: 00007f2044c4c700 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2044d29108 R13: 0030656c69662f2e R14: 00007f2044c4c400 R15: 00007f2044d624b8 </TASK> ================================================================================
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