[patch] sock.c: potential null dereference

[Dan Carpenter]

We test that "prot->rsk_prot" is non-null right before we dereference it
on this line.

Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>

diff --git a/net/core/sock.c b/net/core/sock.c
index fcd397a..fa427b5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2276,7 +2276,8 @@ out_free_request_sock_slab:
 		prot->rsk_prot->slab = NULL;
 	}
 out_free_request_sock_slab_name:
-	kfree(prot->rsk_prot->slab_name);
+	if (prot->rsk_prot)
+		kfree(prot->rsk_prot->slab_name);
 out_free_sock_slab:
 	kmem_cache_destroy(prot->slab);
 	prot->slab = NULL;
--
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