Re: [syzbot] KASAN: invalid-free in io_clean_op

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On 9/25/22 18:54, Pavel Begunkov wrote:
On 9/25/22 18:29, syzbot wrote:
Hello,

syzbot found the following issue on:

HEAD commit:    aaa11ce2ffc8 Add linux-next specific files for 20220923
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1608cadf080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294
dashboard link: https://syzkaller.appspot.com/bug?extid=edfd15cd4246a3fc615a
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=144acdef080000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10686540880000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+edfd15cd4246a3fc615a@xxxxxxxxxxxxxxxxxxxxxxxxx

#syz test: git://git.kernel.dk/linux.git for-6.1/io_uring

Should be similar to the previous net/op_clean problem but
now zc and because of that we set CLEANUP too early. Just
a guess, will take a look at the repro

--
Pavel Begunkov



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