[PATCH AUTOSEL 4.14 40/44] drm/vmwgfx: fix memory leak when too many retries have occurred

[Sasha Levin]

From: Colin Ian King <colin.k...@canonical.com>

[ Upstream commit 6b7c3b86f0b63134b2ab56508921a0853ffa687a ]

Currently when too many retries have occurred there is a memory
leak on the allocation for reply on the error return path. Fix
this by kfree'ing reply before returning.

Addresses-Coverity: ("Resource leak")
Fixes: a9cd9c044aa9 ("drm/vmwgfx: Add a check to handle host message failure")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
Reviewed-by: Deepak Rawat <dra...@vmware.com>
Signed-off-by: Deepak Rawat <dra...@vmware.com>
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
index 97000996b8dc5..50cc060cc552a 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
@@ -300,8 +300,10 @@ static int vmw_recv_msg(struct rpc_channel *channel, void 
**msg,
                break;
        }
 
-       if (retries == RETRIES)
+       if (retries == RETRIES) {
+               kfree(reply);
                return -EINVAL;
+       }
 
        *msg_len = reply_len;
        *msg     = reply;
-- 
2.20.1