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| author | Xin Long <lucien.xin@gmail.com> | 2018-03-14 14:05:30 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-14 20:48:27 +0300 |
| commit | 1b1e0bc9947427ae58bbe7de0ce9cfd591b589b9 (patch) | |
| tree | 4d113bf0c79a697420a1463d6fe1798ad6f4e0d9 /net/sctp/sm_statefuns.c | |
| parent | c469012729bda6515779590d9588d3e36fdf449d (diff) | |
| download | linux-1b1e0bc9947427ae58bbe7de0ce9cfd591b589b9.tar.xz | |
sctp: add refcnt support for sh_key
With refcnt support for sh_key, chunks auth sh_keys can be decided
before enqueuing it. Changing the active key later will not affect
the chunks already enqueued.
Furthermore, this is necessary when adding the support for authinfo
for sendmsg in next patch.
Note that struct sctp_chunk can't be grown due to that performance
drop issue on slow cpu, so it just reuses head_skb memory for shkey
in sctp_chunk.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/sm_statefuns.c')
| -rw-r--r-- | net/sctp/sm_statefuns.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index eb7905ffe5f2..792e0e2be320 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -4114,6 +4114,7 @@ static enum sctp_ierror sctp_sf_authenticate( const union sctp_subtype type, struct sctp_chunk *chunk) { + struct sctp_shared_key *sh_key = NULL; struct sctp_authhdr *auth_hdr; __u8 *save_digest, *digest; struct sctp_hmac *hmac; @@ -4135,9 +4136,11 @@ static enum sctp_ierror sctp_sf_authenticate( * configured */ key_id = ntohs(auth_hdr->shkey_id); - if (key_id != asoc->active_key_id && !sctp_auth_get_shkey(asoc, key_id)) - return SCTP_IERROR_AUTH_BAD_KEYID; - + if (key_id != asoc->active_key_id) { + sh_key = sctp_auth_get_shkey(asoc, key_id); + if (!sh_key) + return SCTP_IERROR_AUTH_BAD_KEYID; + } /* Make sure that the length of the signature matches what * we expect. @@ -4166,7 +4169,7 @@ static enum sctp_ierror sctp_sf_authenticate( sctp_auth_calculate_hmac(asoc, chunk->skb, (struct sctp_auth_chunk *)chunk->chunk_hdr, - GFP_ATOMIC); + sh_key, GFP_ATOMIC); /* Discard the packet if the digests do not match */ if (memcmp(save_digest, digest, sig_len)) { |