From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93DAD522E for ; Sun, 9 Jul 2023 11:32:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13EF0C433C8; Sun, 9 Jul 2023 11:32:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1688902322; bh=OdP2eH2SiUnr2dlXILwjLufGnE2ddbWUuq0bsRdpu2E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OpnP7QjOWJT10xv0o7KvMNBbrI1Gr+MP8zDcHP3fe2CQ/WVAASOHLFL1QvvZKkJ1d d5Fzm/Ppv6rk9J5RjQ/gBBou0PiHgeT3zmvZMdI8JuvfUtUT4aWyZXIR14GAm0Skf1 E8m/DDP0493Fhhdn0jj+N6yc5HBwNVfYp2o/t1M8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Su Hui , Takashi Iwai , Sasha Levin Subject: [PATCH 6.3 307/431] ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer Date: Sun, 9 Jul 2023 13:14:15 +0200 Message-ID: <20230709111458.359875212@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230709111451.101012554@linuxfoundation.org> References: <20230709111451.101012554@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Su Hui [ Upstream commit 79597c8bf64ca99eab385115743131d260339da5 ] smatch error: sound/pci/ac97/ac97_codec.c:2354 snd_ac97_mixer() error: we previously assumed 'rac97' could be null (see line 2072) remove redundant assignment, return error if rac97 is NULL. Fixes: da3cec35dd3c ("ALSA: Kill snd_assert() in sound/pci/*") Signed-off-by: Su Hui Link: https://lore.kernel.org/r/20230615021732.1972194-1-suhui@nfschina.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/pci/ac97/ac97_codec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c index 9afc5906d662e..80a65b8ad7b9b 100644 --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -2069,8 +2069,8 @@ int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template, .dev_disconnect = snd_ac97_dev_disconnect, }; - if (rac97) - *rac97 = NULL; + if (!rac97) + return -EINVAL; if (snd_BUG_ON(!bus || !template)) return -EINVAL; if (snd_BUG_ON(template->num >= 4)) -- 2.39.2