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| author | David Howells <dhowells@redhat.com> | 2016-03-04 15:56:06 +0000 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2016-03-04 15:56:06 +0000 |
| commit | 351c1e648623b742fe1687636117306adc8b561c (patch) | |
| tree | 483d1630ed4dc47d80ed77bcd266eac81dea1ce2 | |
| parent | ee6fe085a992d40d2b5d3e7e2b9e0eec1cdacaac (diff) | |
| download | linux-351c1e648623b742fe1687636117306adc8b561c.tar.gz | |
rxrpc: Be more selective about the types of received packets we accept
Currently, received RxRPC packets outside the range 1-13 are rejected. There are, however, holes in the range that should also be rejected - plus at least one type we don't yet support - so reject these also. Signed-off-by: David Howells <dhowells@redhat.com>
| -rw-r--r-- | include/rxrpc/packet.h | 11 | ||||
| -rw-r--r-- | net/rxrpc/ar-input.c | 3 |
2 files changed, 13 insertions, 1 deletions
diff --git a/include/rxrpc/packet.h b/include/rxrpc/packet.h index de1e67988ada..9ebab3a8cf0a 100644 --- a/include/rxrpc/packet.h +++ b/include/rxrpc/packet.h @@ -70,6 +70,17 @@ struct rxrpc_wire_header { extern const char *rxrpc_pkts[]; +#define RXRPC_SUPPORTED_PACKET_TYPES ( \ + (1 << RXRPC_PACKET_TYPE_DATA) | \ + (1 << RXRPC_PACKET_TYPE_ACK) | \ + (1 << RXRPC_PACKET_TYPE_BUSY) | \ + (1 << RXRPC_PACKET_TYPE_ABORT) | \ + (1 << RXRPC_PACKET_TYPE_ACKALL) | \ + (1 << RXRPC_PACKET_TYPE_CHALLENGE) | \ + (1 << RXRPC_PACKET_TYPE_RESPONSE) | \ + /*(1 << RXRPC_PACKET_TYPE_DEBUG) | */ \ + (1 << RXRPC_PACKET_TYPE_VERSION)) + /*****************************************************************************/ /* * jumbo packet secondary header diff --git a/net/rxrpc/ar-input.c b/net/rxrpc/ar-input.c index e6396a8c969f..63ed75c40e29 100644 --- a/net/rxrpc/ar-input.c +++ b/net/rxrpc/ar-input.c @@ -728,7 +728,8 @@ void rxrpc_data_ready(struct sock *sk) sp->hdr.flags & RXRPC_CLIENT_INITIATED ? "ToServer" : "ToClient", sp->hdr.epoch, sp->hdr.cid, sp->hdr.callNumber); - if (sp->hdr.type == 0 || sp->hdr.type >= RXRPC_N_PACKET_TYPES) { + if (sp->hdr.type >= RXRPC_N_PACKET_TYPES || + !((RXRPC_SUPPORTED_PACKET_TYPES >> sp->hdr.type) & 1)) { _proto("Rx Bad Packet Type %u", sp->hdr.type); goto bad_message; } |