linux-kernel - Re: [PATCH] squashfs: squashfs_read_data need to check if the length is 0

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Message-Id: <20231116134332.285510d340637171d2fe968c@linux-foundation.org>
Date:   Thu, 16 Nov 2023 13:43:32 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Lizhi Xu <lizhi.xu@...driver.com>
Cc:     <syzbot+32d3767580a1ea339a81@...kaller.appspotmail.com>,
        <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <phillip@...ashfs.org.uk>, <squashfs-devel@...ts.sourceforge.net>,
        <syzkaller-bugs@...glegroups.com>
Subject: Re: [PATCH] squashfs: squashfs_read_data need to check if the
 length is 0

On Thu, 16 Nov 2023 11:13:52 +0800 Lizhi Xu <lizhi.xu@...driver.com> wrote:

> when the length passed in is 0, the subsequent process should be exited.

Thanks, but when fixing a bug, please always describe the runtime
effects of that bug.  Amongst other things, other people need this
information to be able to decide which kernel versions need patching.

> Reported-by: syzbot+32d3767580a1ea339a81@...kaller.appspotmail.com

Which is a reason why we're now adding the "Closes:" tag after
Reported-by:.

I googled the sysbot email address and so added

Closes: https://lkml.kernel.org/r/0000000000000526f2060a30a085@google.com

to the changelog.

I'll assume that a -stable kernel backport is needed.