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SubjectRe: [syzbot] INFO: task hung in io_uring_cancel_generic (2)
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syzbot has bisected this issue to:

commit 741ec653ab58f5f263f2b6df38157997661c7a50
Author: Qu Wenruo <wqu@suse.com>
Date: Mon Sep 27 07:22:01 2021 +0000

btrfs: subpage: make end_compressed_bio_writeback() compatible

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=103f2ae5b00000
start commit: cd8c917a56f2 Makefile: Do not quote value for CONFIG_CC_IM..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=123f2ae5b00000
console output: https://syzkaller.appspot.com/x/log.txt?x=143f2ae5b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=5247c9e141823545
dashboard link: https://syzkaller.appspot.com/bug?extid=21e6887c0be14181206d
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1218dce1b00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16f91d89b00000

Reported-by: syzbot+21e6887c0be14181206d@syzkaller.appspotmail.com
Fixes: 741ec653ab58 ("btrfs: subpage: make end_compressed_bio_writeback() compatible")

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

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