linux-kernel - Re: [syzbot] KASAN: use-after-free Read in h4_recv

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Date:   Wed, 15 Sep 2021 02:51:06 -0700
From:   syzbot <syzbot+a06c3db558cbb33d7ff9@...kaller.appspotmail.com>
To:     johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        luiz.dentz@...il.com, marcel@...tmann.org,
        stephen.s.brennan@...cle.com, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: [syzbot] KASAN: use-after-free Read in h4_recv_buf

syzbot suspects this issue was fixed by commit:

commit 0766ec82e5fb26fc5dc6d592bc61865608bdc651
Author: Stephen Brennan <stephen.s.brennan@...cle.com>
Date:   Wed Sep 1 17:51:41 2021 +0000

    namei: Fix use after free in kern_path_locked

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14b29973300000
start commit:   7c60610d4767 Linux 5.14-rc6
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=f61012d0b1cd846f
dashboard link: https://syzkaller.appspot.com/bug?extid=a06c3db558cbb33d7ff9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=147f96ee300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=112b3629300000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: namei: Fix use after free in kern_path_locked

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