Messages in this thread Patch in this message | | | From | Dmitry Safonov <> | Subject | [PATCH 06/18] netlink: Do not subscribe to non-existent groups | Date | Thu, 26 Jul 2018 03:31:32 +0100 |
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Make ABI more strict about subscribing to group > ngroups. Code doesn't check for that and it looks bogus. (one can subscribe to non-existing group) Still, it's possible to bind() to all possible groups with (-1)
Cc: "David S. Miller" <davem@davemloft.net> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: netdev@vger.kernel.org Signed-off-by: Dmitry Safonov <dima@arista.com> --- net/netlink/af_netlink.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 393573a99a5a..ac805caed2e2 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1008,6 +1008,7 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr, if (err) return err; } + groups &= (1UL << nlk->ngroups) - 1; bound = nlk->bound; if (bound) { -- 2.13.6
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