Messages in this thread | | | Date | Tue, 31 May 2022 17:00:23 +0800 | Subject | Re: [syzbot] UBSAN: array-index-out-of-bounds in io_submit_sqes | From | Hao Xu <> |
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On 5/31/22 16:45, Jens Axboe wrote: > On 5/31/22 1:55 AM, syzbot wrote: >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: 3b46e4e44180 Add linux-next specific files for 20220531 >> git tree: linux-next >> console output: https://syzkaller.appspot.com/x/log.txt?x=16e151f5f00000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=ccb8d66fc9489ef >> dashboard link: https://syzkaller.appspot.com/bug?extid=b6c9b65b6753d333d833 >> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 >> >> Unfortunately, I don't have any reproducer for this issue yet. >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+b6c9b65b6753d333d833@syzkaller.appspotmail.com >> >> ================================================================================ >> ================================================================================ >> UBSAN: array-index-out-of-bounds in fs/io_uring.c:8860:19 >> index 75 is out of range for type 'io_op_def [47]' > > 'def' is just set here, it's not actually used after 'opcode' has been > verified. >
Maybe we can move it to be below the opcode check to comfort UBSAN.
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