From: Kalle Valo <kvalo@codeaurora.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Amitkumar Karwar <amitkarwar@gmail.com>,
Ganapathi Bhat <ganapathi017@gmail.com>,
Sharvari Harisangam <sharvari.harisangam@nxp.com>,
Xinming Hu <huxinming820@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: Re: [PATCH] mwifiex: avoid null-pointer-subtraction warning
Date: Tue, 28 Sep 2021 14:42:39 +0000 (UTC) [thread overview]
Message-ID: <20210928144239.80D0EC43618@smtp.codeaurora.org> (raw)
In-Reply-To: <20210927121656.940304-1-arnd@kernel.org>
Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> clang complains about some NULL pointer arithmetic in this driver:
>
> drivers/net/wireless/marvell/mwifiex/sta_tx.c:65:59: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction]
> pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)-
> ^
> drivers/net/wireless/marvell/mwifiex/uap_txrx.c:478:53: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction]
> pad = ((void *)skb->data - (sizeof(*txpd) + hroom) - NULL) &
>
> Rework that expression to do the same thing using a uintptr_t.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patch applied to wireless-drivers.git, thanks.
603a1621caa0 mwifiex: avoid null-pointer-subtraction warning
--
https://patchwork.kernel.org/project/linux-wireless/patch/20210927121656.940304-1-arnd@kernel.org/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
prev parent reply other threads:[~2021-09-28 14:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-27 12:16 [PATCH] mwifiex: avoid null-pointer-subtraction warning Arnd Bergmann
2021-09-28 6:43 ` Kalle Valo
2021-09-28 14:42 ` Kalle Valo
2021-09-28 14:42 ` Kalle Valo [this message]
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