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authorChuhong Yuan <hslester96@gmail.com>2020-01-13 13:59:51 +0800
committerHans Verkuil <hverkuil-cisco@xs4all.nl>2020-01-23 13:21:01 +0100
commitf796f53ef6216fcfcc5d5f216e2bcd81ce930a64 (patch)
treeb5ffa14d78c641a29a16b38120e94d8f5c648951
parent6add769bc47af6c0ff93c1e6eb2143f4edad7d9b (diff)
media: allegro: add missed checks in allegro_open()br-v5.6l
allegro_open() misses checks for v4l2_m2m_ctx_init() and results of v4l2_ctrl_new* calls. Add checks and error handlers to fix the problems. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
-rw-r--r--drivers/staging/media/allegro-dvt/allegro-core.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/staging/media/allegro-dvt/allegro-core.c b/drivers/staging/media/allegro-dvt/allegro-core.c
index 6f0cd0784786..e86001e42963 100644
--- a/drivers/staging/media/allegro-dvt/allegro-core.c
+++ b/drivers/staging/media/allegro-dvt/allegro-core.c
@@ -2270,15 +2270,12 @@ static int allegro_open(struct file *file)
struct allegro_channel *channel = NULL;
struct v4l2_ctrl_handler *handler;
u64 mask;
+ int ret;
channel = kzalloc(sizeof(*channel), GFP_KERNEL);
if (!channel)
return -ENOMEM;
- v4l2_fh_init(&channel->fh, vdev);
- file->private_data = &channel->fh;
- v4l2_fh_add(&channel->fh);
-
init_completion(&channel->completion);
channel->dev = dev;
@@ -2328,6 +2325,11 @@ static int allegro_open(struct file *file)
V4L2_CID_MIN_BUFFERS_FOR_OUTPUT,
1, 32,
1, 1);
+ if (handler->error != 0) {
+ ret = handler->error;
+ goto error;
+ }
+
channel->fh.ctrl_handler = handler;
channel->mcu_channel_id = -1;
@@ -2341,7 +2343,21 @@ static int allegro_open(struct file *file)
channel->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, channel,
allegro_queue_init);
+ if (IS_ERR(channel->fh.m2m_ctx)) {
+ ret = PTR_ERR(channel->fh.m2m_ctx);
+ goto error;
+ }
+
+ v4l2_fh_init(&channel->fh, vdev);
+ file->private_data = &channel->fh;
+ v4l2_fh_add(&channel->fh);
+
return 0;
+
+error:
+ v4l2_ctrl_handler_free(handler);
+ kfree(channel);
+ return ret;
}
static int allegro_release(struct file *file)

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