From: Evgeny Novikov <novikov@xxxxxxxxx>
[ Upstream commit af0321a5be3e5647441eb6b79355beaa592df97a ]
zr364xx_start_readpipe() can fail but callers do not care about that.
This can result in various negative consequences. The patch adds missed
error handling.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@xxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/usb/zr364xx/zr364xx.c | 31 ++++++++++++++++++++++-------
1 file changed, 24 insertions(+), 7 deletions(-)
diff --git a/drivers/media/usb/zr364xx/zr364xx.c b/drivers/media/usb/zr364xx/zr364xx.c
index 2d56cccaa4747..505e08ddde2bb 100644
--- a/drivers/media/usb/zr364xx/zr364xx.c
+++ b/drivers/media/usb/zr364xx/zr364xx.c
@@ -1359,6 +1359,7 @@ static int zr364xx_board_init(struct zr364xx_camera *cam)
{
struct zr364xx_pipeinfo *pipe = cam->pipe;
unsigned long i;
+ int err;
DBG("board init: %p\n", cam);
memset(pipe, 0, sizeof(*pipe));
@@ -1392,9 +1393,8 @@ static int zr364xx_board_init(struct zr364xx_camera *cam)
if (i == 0) {
printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
- kfree(cam->pipe->transfer_buffer);
- cam->pipe->transfer_buffer = NULL;
- return -ENOMEM;
+ err = -ENOMEM;
+ goto err_free;
} else
cam->buffer.dwFrames = i;
@@ -1409,9 +1409,17 @@ static int zr364xx_board_init(struct zr364xx_camera *cam)
/*** end create system buffers ***/
/* start read pipe */
- zr364xx_start_readpipe(cam);
+ err = zr364xx_start_readpipe(cam);
+ if (err)
+ goto err_free;
+
DBG(": board initialized\n");
return 0;
+
+err_free:
+ kfree(cam->pipe->transfer_buffer);
+ cam->pipe->transfer_buffer = NULL;
+ return err;
}
static int zr364xx_probe(struct usb_interface *intf,
@@ -1610,10 +1618,19 @@ static int zr364xx_resume(struct usb_interface *intf)
if (!cam->was_streaming)
return 0;
- zr364xx_start_readpipe(cam);
+ res = zr364xx_start_readpipe(cam);
+ if (res)
+ return res;
+
res = zr364xx_prepare(cam);
- if (!res)
- zr364xx_start_acquire(cam);
+ if (res)
+ goto err_prepare;
+
+ zr364xx_start_acquire(cam);
+ return 0;
+
+err_prepare:
+ zr364xx_stop_readpipe(cam);
return res;
}
#endif
--
2.27.0
