linux-kernel - Re: [syzbot] [integrity] [overlayfs] possible deadlock in mnt_want

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Message-ID: <0000000000001824660606f5d6ac@google.com>
Date:   Thu, 05 Oct 2023 03:46:28 -0700
From:   syzbot <syzbot+b42fe626038981fb7bfa@...kaller.appspotmail.com>
To:     amir73il@...il.com, hdanton@...a.com,
        linux-fsdevel@...r.kernel.org, linux-integrity@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-unionfs@...r.kernel.org, miklos@...redi.hu,
        mszeredi@...hat.com, syzbot@...kalhler.appspotmail.com,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk,
        zohar@...ux.ibm.com, zohar@...ibm.com
Subject: Re: [syzbot] [integrity] [overlayfs] possible deadlock in
 mnt_want_write (2)

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+b42fe626038981fb7bfa@...kaller.appspotmail.com

Tested on:

commit:         42555f30 ima: annotate iint mutex to avoid lockdep fal..
git tree:       https://github.com/amir73il/linux ima-ovl-fix
console output: https://syzkaller.appspot.com/x/log.txt?x=16889486680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=57da1ac039c4c78a
dashboard link: https://syzkaller.appspot.com/bug?extid=b42fe626038981fb7bfa
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.