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net/tls: prevent bad memory access in tls_is_sk_tx_device_offloaded()

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[ Upstream commit b4f47f3848 ]

Unlike '&&' operator, the '&' does not have short-circuit
evaluation semantics.  IOW both sides of the operator always
get evaluated.  Fix the wrong operator in
tls_is_sk_tx_device_offloaded(), which would lead to
out-of-bounds access for for non-full sockets.

Fixes: 4799ac81e5 ("tls: Add rx inline crypto offload")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jakub Kicinski 2019-04-08 17:59:50 -07:00 committed by Greg Kroah-Hartman
parent 7cfddb81a8
commit 785833b9ee
1 changed files with 1 additions and 1 deletions
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2
include/net/tls.h
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@ -317,7 +317,7 @@ tls_validate_xmit_skb(struct sock *sk, struct net_device *dev,
static inline bool tls_is_sk_tx_device_offloaded(struct sock *sk)
{
#ifdef CONFIG_SOCK_VALIDATE_XMIT
return sk_fullsock(sk) &
return sk_fullsock(sk) &&
(smp_load_acquire(&sk->sk_validate_xmit_skb) ==
&tls_validate_xmit_skb);
#else