linux-kernel - Re: [PATCH] isdn: isdnloop: fix pointer dereference bug

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Message-Id: <20190307.092943.881338723409230235.davem@davemloft.net>
Date:   Thu, 07 Mar 2019 09:29:43 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     isdn@...ux-pingi.de, ndesaulniers@...gle.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] isdn: isdnloop: fix pointer dereference bug

From: Arnd Bergmann <arnd@...db.de>
Date: Thu,  7 Mar 2019 10:32:07 +0100

> clang has spotted an ancient code bug and warns about it with:
> 
> drivers/isdn/isdnloop/isdnloop.c:573:12: error: address of array 'card->rcard' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
> 
> This is an array of pointers, so we should check if a specific
> pointer exists in the array before using it, not whether the
> array itself exists.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied.