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Subject[PATCH 4.14 155/496] xen/pvcalls: fix null pointer dereference on map->sock
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

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

[ Upstream commit 68d2059be660944152ba667e43c3b4ec225974bc ]

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@canonical.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/xen/pvcalls-back.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -424,7 +424,7 @@ static int pvcalls_back_connect(struct x
sock);
if (!map) {
ret = -EFAULT;
- sock_release(map->sock);
+ sock_release(sock);
}

out:

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