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| author |   Herbert Xu <herbert@gondor.apana.org.au> | 2016-06-26 14:55:24 -0700 |
|---|---|---|
| committer |   David Howells <dhowells@redhat.com> | 2016-07-06 10:43:05 +0100 |
| commit | a263629da519b2064588377416e067727e2cbdf9 (patch) | |
| tree | 13438d940f9a8c3aa4824955d2242813f95b4900 /net/rxrpc/conn_object.c | |
| parent | rxrpc: Check the source of a packet to a client conn (diff) | |
| download | linux-dev-a263629da519b2064588377416e067727e2cbdf9.tar.xz linux-dev-a263629da519b2064588377416e067727e2cbdf9.zip | |
rxrpc: Avoid using stack memory in SG lists in rxkad
rxkad uses stack memory in SG lists which would not work if stacks were
allocated from vmalloc memory. In fact, in most cases this isn't even
necessary as the stack memory ends up getting copied over to kmalloc
memory.
This patch eliminates all the unnecessary stack memory uses by supplying
the final destination directly to the crypto API. In two instances where a
temporary buffer is actually needed we also switch use a scratch area in
the rxrpc_call struct (only one DATA packet will be being secured or
verified at a time).
Finally there is no need to split a split-page buffer into two SG entries
so code dealing with that has been removed.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/conn_object.c')
| -rw-r--r-- | net/rxrpc/conn_object.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 2c2456ff2853..c2c0926af546 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -138,7 +138,9 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp) if (ret < 0) goto error_1; - conn->security->prime_packet_security(conn); + ret = conn->security->prime_packet_security(conn); + if (ret < 0) + goto error_2; write_lock(&rxrpc_connection_lock); list_add_tail(&conn->link, &rxrpc_connections); @@ -152,6 +154,8 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp) _leave(" = %p", conn); return conn; +error_2: + conn->security->clear(conn); error_1: rxrpc_put_client_connection_id(conn); error_0: |