netdev - Re: [PATCH] hv/netvsc: Fix NULL dereference at single queue mode fallback

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Date:   Tue, 14 Aug 2018 10:29:32 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     tiwai@...e.de
Cc:     sthemmin@...rosoft.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        devel@...uxdriverproject.org, netdev@...r.kernel.org
Subject: Re: [PATCH] hv/netvsc: Fix NULL dereference at single queue mode
 fallback

From: Takashi Iwai <tiwai@...e.de>
Date: Tue, 14 Aug 2018 19:10:50 +0200

> The recent commit 916c5e1413be ("hv/netvsc: fix handling of fallback
> to single queue mode") tried to fix the fallback behavior to a single
> queue mode, but it changed the function to return zero incorrectly,
> while the function should return an object pointer.  Eventually this
> leads to a NULL dereference at the callers that expect non-NULL
> value.
> 
> Fix it by returning the proper net_device object.
> 
> Fixes: 916c5e1413be ("hv/netvsc: fix handling of fallback to single queue mode")
> Signed-off-by: Takashi Iwai <tiwai@...e.de>

Applied and queued up for -stable.

Please do not put explicit "CC: stable" notations in networking patches, I queue
up and submit networking patches to -stable explicitly.

Thank you.