linux-kernel - Re: [syzbot] [overlayfs?] KASAN: invalid-free in ovl_copy_up

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Date:   Wed, 27 Sep 2023 08:10:22 -0700
From:   syzbot <syzbot+477d8d8901756d1cbba1@...kaller.appspotmail.com>
To:     amir73il@...il.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        miklos@...redi.hu, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [overlayfs?] KASAN: invalid-free in ovl_copy_up_one

Hello,

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

Reported-and-tested-by: syzbot+477d8d8901756d1cbba1@...kaller.appspotmail.com

Tested on:

commit:         8e9b46c4 ovl: do not encode lower fh with upper sb_wri..
git tree:       https://github.com/amir73il/linux.git ovl_want_write
console output: https://syzkaller.appspot.com/x/log.txt?x=10d10ffa680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bb54ecdfa197f132
dashboard link: https://syzkaller.appspot.com/bug?extid=477d8d8901756d1cbba1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, 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.