linux-kernel - Re: [PATCH v6.13 v2] fs/netfs/read_collect: fix crash due to uninitialized `prev` variable

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Message-ID: <2025031020-unframed-blast-a985@gregkh>
Date: Mon, 10 Mar 2025 12:51:25 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Johannes Berg <johannes@...solutions.net>
Cc: Max Kellermann <max.kellermann@...os.com>, dhowells@...hat.com,
	netfs@...ts.linux.dev, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH v6.13 v2] fs/netfs/read_collect: fix crash due to
 uninitialized `prev` variable

On Fri, Mar 07, 2025 at 03:27:41PM +0100, Johannes Berg wrote:
> On Fri, 2025-02-14 at 14:12 +0100, Max Kellermann wrote:
> > When checking whether the edges of adjacent subrequests touch, the
> > `prev` variable is deferenced, but it might not have been initialized.
> > This causes crashes like this one:
> 
> [...]
> 
> I believe we also need this in 6.12?

Now added, thanks.

greg k-h