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SubjectRe: [syzbot] WARNING in io_uring_setup (2)
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syzbot has bisected this issue to:

commit eae071c9b4cefbcc3f985c5abf9a6e32c1608ca9
Author: Pavel Begunkov <asml.silence@gmail.com>
Date: Sun Apr 25 13:32:24 2021 +0000

io_uring: prepare fixed rw for dynanic buffers

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13f639edd00000
start commit: d72cd4ad Merge tag 'scsi-misc' of git://git.kernel.org/pub..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=100e39edd00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17f639edd00000
kernel config: https://syzkaller.appspot.com/x/.config?x=53fdf14defd48c56
dashboard link: https://syzkaller.appspot.com/bug?extid=1eca5b0d7ac82b74d347
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15aeff43d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1747117dd00000

Reported-by: syzbot+1eca5b0d7ac82b74d347@syzkaller.appspotmail.com
Fixes: eae071c9b4ce ("io_uring: prepare fixed rw for dynanic buffers")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

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