media: dvb-core: fix a memory leak bug

[ Upstream commit fcd5ce4b3936242e6679875a4d3c3acfc8743e15 ]

In dvb_create_media_entity(), 'dvbdev->entity' is allocated through
kzalloc(). Then, 'dvbdev->pads' is allocated through kcalloc(). However, if
kcalloc() fails, the allocated 'dvbdev->entity' is not deallocated, leading
to a memory leak bug. To fix this issue, free 'dvbdev->entity' before
returning -ENOMEM.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index 41aad0f99d73c43fe1ab997e4fad93df6ba2b9ec..ba3c68fb9676bad7454bccef63c1a4baca3ee196 100644 (file)
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -316,8 +316,10 @@ static int dvb_create_media_entity(struct dvb_device *dvbdev,
        if (npads) {
                dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads),
                                       GFP_KERNEL);
-               if (!dvbdev->pads)
+               if (!dvbdev->pads) {
+                       kfree(dvbdev->entity);
                        return -ENOMEM;
+               }
        }
 
        switch (type) {