From: Jungo Lin jungo.lin@mediatek.com
[ Upstream commit f49308878d7202e07d8761238e01bd0e5fce2750 ]
In v4l2-compliance utility, test MEDIA_IOC_ENUM_ENTITIES will check whether reserved field of media_links_enum filled with zero.
However, for 32 bit program, the reserved field is missing copy from kernel space to user space in media_device_enum_links32 function.
This patch adds the cleaning a reserved field logic in media_device_enum_links32 function.
Signed-off-by: Jungo Lin jungo.lin@mediatek.com Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/media-device.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index 3bae24b15eaa..ba344e6f0139 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -487,6 +487,7 @@ static long media_device_enum_links32(struct media_device *mdev, { struct media_links_enum links; compat_uptr_t pads_ptr, links_ptr; + int ret;
memset(&links, 0, sizeof(links));
@@ -498,7 +499,13 @@ static long media_device_enum_links32(struct media_device *mdev, links.pads = compat_ptr(pads_ptr); links.links = compat_ptr(links_ptr);
- return media_device_enum_links(mdev, &links); + ret = media_device_enum_links(mdev, &links); + if (ret) + return ret; + + memset(ulinks->reserved, 0, sizeof(ulinks->reserved)); + + return 0; }
#define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32)