[PATCH] xen/pvcalls: fix null pointer dereference on map->sock

From: Colin King
Date: Thu Feb 22 2018 - 12:23:13 EST


From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

Currently if map is null then a potential null pointer deference
occurs when calling sock_release on map->sock. I believe the
actual intention was to call sock_release on sock instead. Fix
this.

Fixes: 5db4d286a8ef ("xen/pvcalls: implement connect command")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
drivers/xen/pvcalls-back.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
index 156e5aea36db..b1092fbefa63 100644
--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -416,7 +416,7 @@ static int pvcalls_back_connect(struct xenbus_device *dev,
sock);
if (!map) {
ret = -EFAULT;
- sock_release(map->sock);
+ sock_release(sock);
}

out:
--
2.15.1