lkml.org 
[lkml]   [2013]   [Jun]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] [media] usbvision-video: fix memory leak of alt_max_pkt_size
Date
1. usbvision->alt_max_pkt_size is not deallocated anywhere.
2. if allocation of usbvision->alt_max_pkt_size fails,
there is no proper deallocation of already acquired resources.

The patch adds kfree(usbvision->alt_max_pkt_size) to
usbvision_release() as soon as other deallocations happen there.
It calls usbvision_release() if allocation of
usbvision->alt_max_pkt_size fails as soon as usbvision_release()
is safe to work with incompletely initialized usbvision structure.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
drivers/media/usb/usbvision/usbvision-video.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/media/usb/usbvision/usbvision-video.c b/drivers/media/usb/usbvision/usbvision-video.c
index d34c2af..443e783 100644
--- a/drivers/media/usb/usbvision/usbvision-video.c
+++ b/drivers/media/usb/usbvision/usbvision-video.c
@@ -1459,6 +1459,7 @@ static void usbvision_release(struct usb_usbvision *usbvision)

usbvision_remove_sysfs(usbvision->vdev);
usbvision_unregister_video(usbvision);
+ kfree(usbvision->alt_max_pkt_size);

usb_free_urb(usbvision->ctrl_urb);

@@ -1574,6 +1575,7 @@ static int usbvision_probe(struct usb_interface *intf,
usbvision->alt_max_pkt_size = kmalloc(32 * usbvision->num_alt, GFP_KERNEL);
if (usbvision->alt_max_pkt_size == NULL) {
dev_err(&intf->dev, "usbvision: out of memory!\n");
+ usbvision_release(usbvision);
return -ENOMEM;
}

--
1.8.1.2


\
 
 \ /
  Last update: 2013-06-11 01:01    [W:0.028 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site