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From: Kalle Valo <kvalo@codeaurora.org>
To: Kees Cook <keescook@chromium.org>
Cc: linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	Joe Perches <joe@perches.com>, Andy Whitcroft <apw@canonical.com>,
	x86@kernel.org, drbd-dev@lists.linbit.com,
	linux-block@vger.kernel.org, b43-dev@lists.infradead.org,
	netdev@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-wireless@vger.kernel.org, linux-ide@vger.kernel.org,
	linux-clk@vger.kernel.org, linux-spi@vger.kernel.org,
	linux-mm@kvack.org, clang-built-linux@googlegroups.com
Subject: Re: [PATCH v2 04/16] b43: Remove uninitialized_var() usage
Date: Wed, 15 Jul 2020 10:37:01 +0000 (UTC)
Message-ID: <20200715103701.5B429C43449@smtp.codeaurora.org> (raw)
In-Reply-To: <20200620033007.1444705-5-keescook@chromium.org>

Kees Cook <keescook@chromium.org> wrote:

> Using uninitialized_var() is dangerous as it papers over real bugs[1]
> (or can in the future), and suppresses unrelated compiler warnings (e.g.
> "unused variable"). If the compiler thinks it is uninitialized, either
> simply initialize the variable or make compiler changes. As a precursor
> to removing[2] this[3] macro[4], just initialize this variable to NULL.
> No later NULL deref is possible due to the early returns outside of the
> (phy->rev >= 7 && phy->rev < 19) case, which explicitly tests for NULL.
> 
> [1] https://lore.kernel.org/lkml/20200603174714.192027-1-glider@google.com/
> [2] https://lore.kernel.org/lkml/CA+55aFw+Vbj0i=1TGqCR5vQkCzWJ0QxK6CernOU6eedsudAixw@mail.gmail.com/
> [3] https://lore.kernel.org/lkml/CA+55aFwgbgqhbp1fkxvRKEpzyR5J8n1vKT1VZdz9knmPuXhOeg@mail.gmail.com/
> [4] https://lore.kernel.org/lkml/CA+55aFz2500WfbKXAx8s67wrm9=yVJu65TpLgN_ybYNv0VEOKA@mail.gmail.com/
> 
> Fixes: 58619b14d106 ("b43: move under broadcom vendor directory")
> Signed-off-by: Kees Cook <keescook@chromium.org>
> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

2 patches applied to wireless-drivers-next.git, thanks.

800e7a205a0f b43: Remove uninitialized_var() usage
f8279dad4e36 rtlwifi: rtl8192cu: Remove uninitialized_var() usage

-- 
https://patchwork.kernel.org/patch/11615573/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches


  parent reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-20  3:29 [PATCH v2 00/16] Remove uninitialized_var() macro Kees Cook
2020-06-20  3:29 ` [PATCH v2 01/16] docs: deprecated.rst: Add uninitialized_var() Kees Cook
2020-06-22 16:59   ` Nick Desaulniers
2020-06-20  3:29 ` [PATCH v2 02/16] x86/mm/numa: Remove uninitialized_var() usage Kees Cook
2020-06-20  3:29 ` [PATCH v2 03/16] drbd: " Kees Cook
2020-06-20  3:29 ` [PATCH v2 04/16] b43: " Kees Cook
2020-06-22 17:04   ` Nick Desaulniers
2020-06-22 21:04     ` Kees Cook
2020-06-23 18:29       ` Nick Desaulniers
2020-07-15 10:37   ` Kalle Valo [this message]
2020-06-20  3:29 ` [PATCH v2 05/16] rtlwifi: rtl8192cu: " Kees Cook
2020-06-20  3:29 ` [PATCH v2 06/16] ide: " Kees Cook
2020-06-20  3:29 ` [PATCH v2 07/16] clk: st: " Kees Cook
2020-06-22  9:03   ` Stephen Boyd
2020-06-20  3:29 ` [PATCH v2 08/16] spi: davinci: " Kees Cook
2020-07-01 20:39   ` Mark Brown
2020-07-02 15:21     ` Kees Cook
2020-07-02 15:23       ` Mark Brown
2020-07-02 15:42         ` Kees Cook
2020-07-02 16:23           ` Joe Perches
2020-06-20  3:30 ` [PATCH v2 09/16] clk: spear: " Kees Cook
2020-06-22  9:03   ` Stephen Boyd
2020-06-20  3:30 ` [PATCH v2 10/16] KVM: PPC: Book3S PR: " Kees Cook
2020-06-22 17:22   ` Nick Desaulniers
2020-06-20  3:30 ` [PATCH v2 11/16] media: sur40: " Kees Cook
2020-06-22 18:39   ` Nick Desaulniers
2020-06-20  3:30 ` [PATCH v2 12/16] f2fs: Eliminate usage of uninitialized_var() macro Kees Cook
2020-06-20  3:30 ` [PATCH v2 14/16] checkpatch: Remove awareness " Kees Cook
2020-06-20  3:30 ` [PATCH v2 15/16] treewide: Remove uninitialized_var() usage Kees Cook
2020-06-20  3:30 ` [PATCH v2 16/16] compiler: Remove uninitialized_var() macro Kees Cook
2020-06-20  3:30 ` [PATCH v2 13/16] mm/debug_vm_pgtable: Remove uninitialized_var() usage Kees Cook
2020-06-22 17:27   ` Nick Desaulniers
2020-06-20  7:03 ` [PATCH v2 00/16] Remove uninitialized_var() macro Sedat Dilek
2020-06-20 15:57   ` Kees Cook
2020-06-22  9:07     ` Sedat Dilek

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