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authorParthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>2016-02-02 10:52:13 +0100
committerDavid S. Miller <davem@davemloft.net>2016-02-06 03:41:58 -0500
commitcb01c7c8701a35866479753fe78d04bd9826dd1b (patch)
tree6ec13eff7ab2c7b33e328094dbb0f49b064769ab /net/tipc
parentc8beccc67c833db4a01c621cbc6eb0a577286806 (diff)
tipc: fix connection abort when receiving invalid cancel request
Until now, the subscribers endianness for a subscription create/cancel request is determined as: swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE)) The checks are performed only for port/service subscriptions. The swap calculation is incorrect if the filter in the subscription cancellation request is set to TIPC_SUB_CANCEL (it's a malformed cancel request, as the corresponding subscription create filter is missing). Thus, the check if the request is for cancellation fails and the request is treated as a subscription create request. The subscription creation fails as the request is illegal, which terminates this connection. In this commit we determine the endianness by including TIPC_SUB_CANCEL, which will set swap correctly and the request is processed as a cancellation request. Acked-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc')
-rw-r--r--net/tipc/subscr.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 531227208ae2..24d2c8128bac 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -309,7 +309,8 @@ static void tipc_subscrb_rcv_cb(struct net *net, int conid,
int swap;
/* Determine subscriber's endianness */
- swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE));
+ swap = !(s->filter & (TIPC_SUB_PORTS | TIPC_SUB_SERVICE |
+ TIPC_SUB_CANCEL));
/* Detect & process a subscription cancellation request */
if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {