chelsio/chtls: fix always leaking ctrl_skb

[ Upstream commit dbfe394dad33f99cf8458be50483ec40a5d29c34 ]

Correct skb refcount in alloc_ctrl_skb(), causing skb memleak
when chtls_send_abort() called with NULL skb.
it was always leaking the skb, correct it by incrementing skb
refs by one.

Fixes: cc35c88ae4db ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Link: https://lore.kernel.org/r/20201102173909.24826-1-vinay.yadav@chelsio.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/chelsio/chtls/chtls_cm.c b/drivers/crypto/chelsio/chtls/chtls_cm.c
index e2c64c943cfc735c877e56e6e57664692c172fb3..385bd4dc668673a9d86b9df2640b7703645676e4 100644 (file)
--- a/drivers/crypto/chelsio/chtls/chtls_cm.c
+++ b/drivers/crypto/chelsio/chtls/chtls_cm.c
@@ -174,7 +174,7 @@ static struct sk_buff *alloc_ctrl_skb(struct sk_buff *skb, int len)
 {
        if (likely(skb && !skb_shared(skb) && !skb_cloned(skb))) {
                __skb_trim(skb, 0);
-               refcount_add(2, &skb->users);
+               refcount_inc(&skb->users);
        } else {
                skb = alloc_skb(len, GFP_KERNEL | __GFP_NOFAIL);
        }