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| author | Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2023-05-22 14:08:20 +0200 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-05-23 15:38:59 +0200 |
| commit | 3632679d9e4f879f49949bb5b050e0de553e4739 (patch) | |
| tree | 49087b5c41f7fe0326d2c9bf6d8f8e3fa427c546 /net/ipv6/raw.c | |
| parent | 600761245952d7f70280add6ce02894f1528992b (diff) | |
| download | linux-3632679d9e4f879f49949bb5b050e0de553e4739.tar.gz | |
ipv{4,6}/raw: fix output xfrm lookup wrt protocol
With a raw socket bound to IPPROTO_RAW (ie with hdrincl enabled), the
protocol field of the flow structure, build by raw_sendmsg() /
rawv6_sendmsg()), is set to IPPROTO_RAW. This breaks the ipsec policy
lookup when some policies are defined with a protocol in the selector.
For ipv6, the sin6_port field from 'struct sockaddr_in6' could be used to
specify the protocol. Just accept all values for IPPROTO_RAW socket.
For ipv4, the sin_port field of 'struct sockaddr_in' could not be used
without breaking backward compatibility (the value of this field was never
checked). Let's add a new kind of control message, so that the userland
could specify which protocol is used.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
CC: stable@vger.kernel.org
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Link: https://lore.kernel.org/r/20230522120820.1319391-1-nicolas.dichtel@6wind.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net/ipv6/raw.c')
| -rw-r--r-- | net/ipv6/raw.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index 7d0adb612bdd0..44ee7a2e72ac2 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -793,7 +793,8 @@ static int rawv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) if (!proto) proto = inet->inet_num; - else if (proto != inet->inet_num) + else if (proto != inet->inet_num && + inet->inet_num != IPPROTO_RAW) return -EINVAL; if (proto > 255) |