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[109.241.207.190]) by smtp.gmail.com with ESMTPSA id o124sm1443874lfe.92.2019.05.11.03.10.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 11 May 2019 03:10:37 -0700 (PDT) From: Janusz Krzysztofik To: Mauro Carvalho Chehab Cc: Hans Verkuil , Sakari Ailus , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Janusz Krzysztofik Subject: [PATCH v4 2/2] media: v4l2-subdev: Verify pad config argument Date: Sat, 11 May 2019 12:10:31 +0200 Message-Id: <20190511101031.4777-3-jmkrzyszt@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190511101031.4777-1-jmkrzyszt@gmail.com> References: <20190511101031.4777-1-jmkrzyszt@gmail.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Extend parameter checks performed by v4l2_subdev_call() with a check for a non-NULL pad config pointer if V4L2_SUBDEV_FORMAT_TRY format type is requested so drivers don't need to care. Signed-off-by: Janusz Krzysztofik --- drivers/media/v4l2-core/v4l2-subdev.c | 30 +++++++++++++++++++-------- 1 file changed, 21 insertions(+), 9 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index cd50fcb86c47..4540d8abff5f 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -126,6 +126,11 @@ static inline int check_which(__u32 which) which != V4L2_SUBDEV_FORMAT_ACTIVE ? -EINVAL : 0; } +static inline int check_cfg(__u32 which, struct v4l2_subdev_pad_config *cfg) +{ + return which == V4L2_SUBDEV_FORMAT_TRY && !cfg ? -EINVAL : 0; +} + #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) static inline int check_pad(struct v4l2_subdev *sd, __u32 pad) { @@ -136,16 +141,18 @@ static inline int check_pad(struct v4l2_subdev *sd, __u32 pad) #endif static int check_format(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { - return check_which(format->which) ? : check_pad(sd, format->pad); + return check_which(format->which) ? : + check_cfg(format->which, cfg) ? : check_pad(sd, format->pad); } static int check_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { - return check_format(sd, format) ? : + return check_format(sd, cfg, format) ? : sd->ops->pad->get_fmt(sd, cfg, format); } @@ -153,7 +160,7 @@ static int check_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *format) { - return check_format(sd, format) ? : + return check_format(sd, cfg, format) ? : sd->ops->pad->set_fmt(sd, cfg, format); } @@ -161,7 +168,8 @@ static int check_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { - return check_which(code->which) ? : check_pad(sd, code->pad) ? : + return check_which(code->which) ? : check_cfg(code->which, cfg) ? : + check_pad(sd, code->pad) ? : sd->ops->pad->enum_mbus_code(sd, cfg, code); } @@ -169,7 +177,8 @@ static int check_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { - return check_which(fse->which) ? : check_pad(sd, fse->pad) ? : + return check_which(fse->which) ? : check_cfg(fse->which, cfg) ? : + check_pad(sd, fse->pad) ? : sd->ops->pad->enum_frame_size(sd, cfg, fse); } @@ -197,21 +206,24 @@ static int check_enum_frame_interval(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_interval_enum *fie) { - return check_which(fie->which) ? : check_pad(sd, fie->pad) ? : + return check_which(fie->which) ? : check_cfg(fie->which, cfg) ? : + check_pad(sd, fie->pad) ? : sd->ops->pad->enum_frame_interval(sd, cfg, fie); } static int check_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { - return check_which(sel->which) ? : check_pad(sd, sel->pad); + return check_which(sel->which) ? : check_cfg(sel->which, cfg) ? : + check_pad(sd, sel->pad); } static int check_get_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { - return check_selection(sd, sel) ? : + return check_selection(sd, cfg, sel) ? : sd->ops->pad->get_selection(sd, cfg, sel); } @@ -219,7 +231,7 @@ static int check_set_selection(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_selection *sel) { - return check_selection(sd, sel) ? : + return check_selection(sd, cfg, sel) ? : sd->ops->pad->set_selection(sd, cfg, sel); }