Re: [syzbot] [io-uring?] WARNING: refcount bug in io_send_zc_cleanup (2)

syzbot
2025-03-22T14:21:05Z

syzbot has bisected this issue to:

commit cc34d8330e036b6bffa88db9ea537bae6b03948f
Author: Jens Axboe <axboe@kernel.dk>
Date: Thu Mar 20 18:25:12 2025 +0000

io_uring/net: don't clear REQ_F_NEED_CLEANUP unconditionally

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15ef043f980000
start commit: d07de43e3f05 Merge tag 'io_uring-6.14-20250321' of git://g..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=17ef043f980000
console output: https://syzkaller.appspot.com/x/log.txt?x=13ef043f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=620facf12ff15d10
dashboard link: https://syzkaller.appspot.com/bug?extid=cf285a028ffba71b2ef5
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16be1c4c580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12223004580000

Reported-by: syzbot+cf285a028ffba71b2ef5@syzkaller.appspotmail.com
Fixes: cc34d8330e03 ("io_uring/net: don't clear REQ_F_NEED_CLEANUP unconditionally")

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