Commit e978de7a authored by Jeremy Cline's avatar Jeremy Cline Committed by David S. Miller
Browse files

net: socket: Fix potential spectre v1 gadget in sock_is_registered



'family' can be a user-controlled value, so sanitize it after the bounds
check to avoid speculative out-of-bounds access.

Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJeremy Cline <jcline@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c8e8cd57
......@@ -2690,7 +2690,8 @@ EXPORT_SYMBOL(sock_unregister);
bool sock_is_registered(int family)
{
return family < NPROTO && rcu_access_pointer(net_families[family]);
return family < NPROTO &&
rcu_access_pointer(net_families[array_index_nospec(family, NPROTO)]);
}
static int __init sock_init(void)
......
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