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Subject: media: uvcvideo: Fix memory leak of object map on error exit path
Author:  Colin Ian King <[email protected]>
Date:    Fri Sep 17 13:49:30 2021 +0200

Currently when the allocation of map->name fails the error exit path
does not kfree the previously allocated object map. Fix this by
setting ret to -ENOMEM and taking the free_map exit error path to
ensure map is kfree'd.

Addresses-Coverity: ("Resource leak")

Fixes: 70fa906d6fce ("media: uvcvideo: Use control names from framework")
Signed-off-by: Colin Ian King <[email protected]>
Reviewed-by: Ricardo Ribalda <[email protected]>
Signed-off-by: Laurent Pinchart <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/usb/uvc/uvc_v4l2.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

---

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index f4e4aff8ddf7..711556d13d03 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -44,8 +44,10 @@ static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
        if (v4l2_ctrl_get_name(map->id) == NULL) {
                map->name = kmemdup(xmap->name, sizeof(xmap->name),
                                    GFP_KERNEL);
-               if (!map->name)
-                       return -ENOMEM;
+               if (!map->name) {
+                       ret = -ENOMEM;
+                       goto free_map;
+               }
        }
        memcpy(map->entity, xmap->entity, sizeof(map->entity));
        map->selector = xmap->selector;

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