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Date:   Mon, 16 Jan 2017 14:40:51 -0500 (EST)
From:   David Miller <>
Subject: Re: [PATCH 1/1] ax25: Fix segfault after sock connection timeout

From: Basil Gunn <>
Date: Sat, 14 Jan 2017 12:18:55 -0800

> The ax.25 socket connection timed out & the sock struct has been
> previously taken down ie. sock struct is now a NULL pointer. Checking
> the sock_flag causes the segfault.  Check if the socket struct pointer
> is NULL before checking sock_flag. This segfault is seen in
> timed out netrom connections.
> Please submit to -stable.
> Signed-off-by: Basil Gunn <>

This is consistent with the ax25->sk NULL check later in this function.

Applied and queued up for -stable, thanks.

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