linux-kernel - [PATCH] media: venus: venc: Fix potential null pointer dereference on pointer fmt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20210709123025.456006-1-colin.king@canonical.com>
Date:   Fri,  9 Jul 2021 13:30:25 +0100
From:   Colin King <colin.king@...onical.com>
To:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: venus: venc: Fix potential null pointer dereference on pointer fmt

From: Colin Ian King <colin.king@...onical.com>

Currently the call to find_format can potentially return a NULL to
fmt and the nullpointer is later dereferenced on the assignment of
pixmp->num_planes = fmt->num_planes.  Fix this by adding a NULL pointer
check and returning NULL for the failure case.

Addresses-Coverity: ("Dereference null return")
Fixes: aaaa93eda64b ("[media] media: venus: venc: add video encoder files")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/media/platform/qcom/venus/venc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 8dd49d4f124c..1d62e38065d6 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -183,6 +183,8 @@ venc_try_fmt_common(struct venus_inst *inst, struct v4l2_format *f)
 		else
 			return NULL;
 		fmt = find_format(inst, pixmp->pixelformat, f->type);
+		if (!fmt)
+			return NULL;
 	}
 
 	pixmp->width = clamp(pixmp->width, frame_width_min(inst),
-- 
2.31.1