Messages in this thread | | | Date | Wed, 28 Sep 2022 13:43:39 -0700 | Subject | [syzbot] UBSAN: shift-out-of-bounds in dbAllocAG | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 3800a713b607 Merge tag 'mm-hotfixes-stable-2022-09-26' of .. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1513bdc4880000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba0d23aa7e1ffaf5 dashboard link: https://syzkaller.appspot.com/bug?extid=15342c1aa6a00fb7a438 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=14e7836c880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16fc20e0880000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+15342c1aa6a00fb7a438@syzkaller.appspotmail.com
loop0: detected capacity change from 0 to 97743 ================================================================================ UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1313:21 shift exponent 8345714 is too large for 64-bit type 's64' (aka 'long long') CPU: 1 PID: 3614 Comm: syz-executor252 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 dbAllocAG+0xf3d/0x1100 fs/jfs/jfs_dmap.c:1313 dbAlloc+0x661/0xc90 fs/jfs/jfs_dmap.c:858 diNewIAG fs/jfs/jfs_imap.c:2500 [inline] diAllocExt fs/jfs/jfs_imap.c:1898 [inline] diAllocAG+0xaf6/0x1f80 fs/jfs/jfs_imap.c:1662 diAlloc+0x3dd/0x1700 fs/jfs/jfs_imap.c:1583 ialloc+0x8c/0xa80 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x141/0xb00 fs/jfs/namei.c:225 vfs_mkdir+0x3b3/0x590 fs/namei.c:4013 do_mkdirat+0x279/0x550 fs/namei.c:4038 __do_sys_mkdir fs/namei.c:4058 [inline] __se_sys_mkdir fs/namei.c:4056 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4056 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: 0033:0x7f533bcccf49 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffffbdf0e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f533bcccf49 RDX: 00007f533bc8b443 RSI: 0000000000000000 RDI: 00000000200052c0 RBP: 00007f533bc8c710 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffffbdf0d20 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00080000000000f8 R15: 0000000000000000 </TASK> ================================================================================
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