tls: get psock ref after taking rxlock to avoid leak

[ Upstream commit 417e91e ] At the start of tls_sw_recvmsg, we take a reference on the psock, and then call tls_rx_reader_lock. If that fails, we return directly without releasing the reference. Instead of adding a new label, just take the reference after locking has succeeded, since we don't need it before. Fixes: 4cbc325 ("tls: rx: allow only one reader at a time") Signed-off-by: Sabrina Dubroca <[email protected]> Reviewed-by: Simon Horman <[email protected]> Link: https://lore.kernel.org/r/fe2ade22d030051ce4c3638704ed58b67d0df643.1711120964.git.sd@queasysnail.net Signed-off-by: Jakub Kicinski <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
hardkernel · Apr 10, 2024 · 30fabe5 · 30fabe5
1 parent f52c8f1
commit 30fabe5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
@@ -2062,10 +2062,10 @@ int tls_sw_recvmsg(struct sock *sk,
 	if (unlikely(flags & MSG_ERRQUEUE))
 		return sock_recv_errqueue(sk, msg, len, SOL_IP, IP_RECVERR);
 
-	psock = sk_psock_get(sk);
 	err = tls_rx_reader_lock(sk, ctx, flags & MSG_DONTWAIT);
 	if (err < 0)
 		return err;
+	psock = sk_psock_get(sk);
 	bpf_strp_enabled = sk_psock_strp_enabled(psock);
 
 	/* If crypto failed the connection is broken */