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| author | David Howells <dhowells@redhat.com> | 2019-07-30 15:56:57 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-30 10:32:35 -0700 |
| commit | 1db88c5343712e411a2dd45375f27c477e33dc07 (patch) | |
| tree | 62ebbf283dc01704b5f9fa81475a527bfc038021 /net/rxrpc/call_object.c | |
| parent | 85fd8011475e86265beff7b7617c493c247f5356 (diff) | |
| download | linux-1db88c5343712e411a2dd45375f27c477e33dc07.tar.bz2 | |
rxrpc: Fix -Wframe-larger-than= warnings from on-stack crypto
rxkad sometimes triggers a warning about oversized stack frames when
building with clang for a 32-bit architecture:
net/rxrpc/rxkad.c:243:12: error: stack frame size of 1088 bytes in function 'rxkad_secure_packet' [-Werror,-Wframe-larger-than=]
net/rxrpc/rxkad.c:501:12: error: stack frame size of 1088 bytes in function 'rxkad_verify_packet' [-Werror,-Wframe-larger-than=]
The problem is the combination of SYNC_SKCIPHER_REQUEST_ON_STACK() in
rxkad_verify_packet()/rxkad_secure_packet() with the relatively large
scatterlist in rxkad_verify_packet_1()/rxkad_secure_packet_encrypt().
The warning does not show up when using gcc, which does not inline the
functions as aggressively, but the problem is still the same.
Allocate the cipher buffers from the slab instead, caching the allocated
packet crypto request memory used for DATA packet crypto in the rxrpc_call
struct.
Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rxrpc/call_object.c')
| -rw-r--r-- | net/rxrpc/call_object.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c index 217b12be9e08..60cbc81dc461 100644 --- a/net/rxrpc/call_object.c +++ b/net/rxrpc/call_object.c @@ -476,8 +476,10 @@ void rxrpc_release_call(struct rxrpc_sock *rx, struct rxrpc_call *call) _debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn); - if (conn) + if (conn) { rxrpc_disconnect_call(call); + conn->security->free_call_crypto(call); + } for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) { rxrpc_free_skb(call->rxtx_buffer[i], |