From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zg8tmty3ljk5ljewns4xndka.icoremail.net (zg8tmty3ljk5ljewns4xndka.icoremail.net [167.99.105.149]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A06D82575D for ; Thu, 18 Jan 2024 15:13:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=167.99.105.149 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705590827; cv=none; b=ocLoxU+RBg1dpd34W6EmxDNv/SrBtRR0Q1ZD+D16eIhxJumhmoRiH8vU7Dvh2Ua9RWOdqt8YIvdL5Qjl3n/ecE9uEDWrIPCN08MWsC4jz/4b6r7+TCku+qmLhKG0OxucW3xmSLnStGMUzUL7D+k41X95p2eFqENf+RhLl6tEOZ0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705590827; c=relaxed/simple; bh=Kp2BlCBZMsuGi/OMB6tp4CaDWFkRha05w33XL2xn/Ws=; h=Received:From:To:Cc:Subject:Date:Message-Id:X-Mailer:MIME-Version: Content-Transfer-Encoding:X-CM-TRANSID:X-Coremail-Antispam: X-CM-SenderInfo; b=ldJZ188mIC8xdMgB/zxO+KcIQht7fY14GVsmMqJh/a5n4+cL93UJJmjNd5+vZrO5TFZLg3GU5Tiavm6cukJQcl4MFSQ68AbgvGCt8P+O/0DWMhg7kRrEZYuNrWoJe7mBuaL/LVr2U2f60z1WWbB8leNjOx1FGIFxTZquczVUU/k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=zju.edu.cn; spf=pass smtp.mailfrom=zju.edu.cn; arc=none smtp.client-ip=167.99.105.149 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=zju.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zju.edu.cn Received: from luzhipeng.223.5.5.5 (unknown [183.159.169.110]) by mail-app4 (Coremail) with SMTP id cS_KCgDHwX8gQKllMBo+AA--.10025S2; Thu, 18 Jan 2024 23:13:37 +0800 (CST) From: Zhipeng Lu To: alexious@zju.edu.cn Cc: Hans de Goede , Mauro Carvalho Chehab , Sakari Ailus , Greg Kroah-Hartman , Kate Hsuan , Dan Carpenter , Andy Shevchenko , Brent Pappas , Alan Cox , linux-media@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] [v2] media: atomisp: ssh_css: Fix a null-pointer dereference in load_video_binaries Date: Thu, 18 Jan 2024 23:13:00 +0800 Message-Id: <20240118151303.3828292-1-alexious@zju.edu.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:cS_KCgDHwX8gQKllMBo+AA--.10025S2 X-Coremail-Antispam: 1UD129KBjvJXoW7uw15uw1xGrW5KF1xuF1rWFg_yoW8Xr17pF 48Aw1DCFWUXFn2kanIkry7GF90v34v9ay5W34vqa4F9a92ya4qqF15Kay5Gr9Yvr4DJ3yq vFyYgrWUXF4FyF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9Y14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4U JVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2 Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x 0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2 zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF 4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWU CwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCT nIWIevJa73UjIFyTuYvjfUonmRUUUUU X-CM-SenderInfo: qrsrjiarszq6lmxovvfxof0/ The allocation failure of mycs->yuv_scaler_binary in load_video_binaries is followed with a dereference of mycs->yuv_scaler_binary after the following call chain: sh_css_pipe_load_binaries |-> load_video_binaries (mycs->yuv_scaler_binary == NULL) | |-> sh_css_pipe_unload_binaries |-> unload_video_binaries In unload_video_binaries, it calls to ia_css_binary_unload with argument &pipe->pipe_settings.video.yuv_scaler_binary[i], which refers to the same memory slot as mycs->yuv_scaler_binary. Thus, a null-pointer dereference is triggered. Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2") Signed-off-by: Zhipeng Lu --- Changelog: v2: change fix approach to set mycs->num_yuv_scaler = 0 in load_video_binaries. Change the fix tag to correct commit. --- drivers/staging/media/atomisp/pci/sh_css.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c index f35c90809414..638f08b3f21b 100644 --- a/drivers/staging/media/atomisp/pci/sh_css.c +++ b/drivers/staging/media/atomisp/pci/sh_css.c @@ -4719,6 +4719,7 @@ static int load_video_binaries(struct ia_css_pipe *pipe) sizeof(struct ia_css_binary), GFP_KERNEL); if (!mycs->yuv_scaler_binary) { + mycs->num_yuv_scaler = 0; err = -ENOMEM; return err; } -- 2.34.1