linux-kernel - Re: [PATCH] [net] rxrpc: fix uninitialized pointer dereference in debug code

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Date:	Mon, 08 Aug 2016 13:48:24 +0100
From:	David Howells <dhowells@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	dhowells@...hat.com, "David S. Miller" <davem@...emloft.net>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [net] rxrpc: fix uninitialized pointer dereference in debug code

Arnd Bergmann <arnd@...db.de> wrote:

> A newly added bugfix caused an uninitialized variable to be
> used for printing debug output. This is harmless as long
> as the debug setting is disabled, but otherwise leads to an
> immediate crash.
> 
> gcc warns about this when -Wmaybe-uninitialized is enabled:
> 
> net/rxrpc/call_object.c: In function 'rxrpc_release_call':
> net/rxrpc/call_object.c:496:163: error: 'sp' may be used uninitialized in this function [-Werror=maybe-uninitialized]
> 
> The initialization was removed but one of the users remains.
> This adds back the initialization.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 372ee16386bb ("rxrpc: Fix races between skb free, ACK generation and replying")

Applied, thanks.

David