linux-kernel - Re: [syzbot] [btrfs?] possible deadlock in btrfs_search

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Message-ID: <CANp29Y5DKbC0oCcxoX-fST0LQ8=0KZ-RK-GXL=2Vw=3y++wtOw@mail.gmail.com>
Date:   Wed, 2 Aug 2023 16:17:22 +0200
From:   Aleksandr Nogikh <nogikh@...gle.com>
To:     syzbot <syzbot+c06034aecf9f5eab1ac1@...kaller.appspotmail.com>
Cc:     anand.jain@...cle.com, clm@...com, dsterba@...e.com,
        hdanton@...a.com, josef@...icpanda.com,
        linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [btrfs?] possible deadlock in btrfs_search_slot

On Tue, Aug 1, 2023 at 6:08 PM syzbot
<syzbot+c06034aecf9f5eab1ac1@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit b740d806166979488e798e41743aaec051f2443f
> Author: Josef Bacik <josef@...icpanda.com>
> Date:   Mon Nov 7 16:44:51 2022 +0000
>
>     btrfs: free btrfs_path before copying root refs to userspace
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13015709a80000
> start commit:   eb7081409f94 Linux 6.1-rc6
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=8d01b6e3197974dd
> dashboard link: https://syzkaller.appspot.com/bug?extid=c06034aecf9f5eab1ac1
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=124fc309880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=126dfde5880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: btrfs: free btrfs_path before copying root refs to userspace

Looks reasonable.
#syz fix: btrfs: free btrfs_path before copying root refs to userspace

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