| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.1 029/371] media: media_device_enum_links32: clean a reserved field | Date | Wed, 24 Jul 2019 21:16:21 +0200 |
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[ 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 b8ec88612df7..6893843edada 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -502,6 +502,7 @@ 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)); @@ -513,7 +514,13 @@ 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) -- 2.20.1
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