From 1208220b5f1bb9a644db12844742aa9d2910c1c0 Mon Sep 17 00:00:00 2001 From: Andy Whitcroft Date: Thu, 26 Jul 2012 11:25:52 +0100 Subject: [PATCH] UBUNTU: SAUCE: (no-up) rds_ib_send() -- prevent local pings triggering BUG_ON() Pining localhost on an infiniband connection can trigger a BUG_ON() and cause a denial of service. Fix identified by comparison of the RHEL source rpms. CVE-2012-2372 BugLink: http://bugs.launchpad.net/bugs/1016299 Signed-off-by: Andy Whitcroft Signed-off-by: Tim Gardner --- net/rds/ib_send.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c index 4190b90ff3b1..2f57869e64d1 100644 --- a/net/rds/ib_send.c +++ b/net/rds/ib_send.c @@ -503,7 +503,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm, int flow_controlled = 0; int nr_sig = 0; - BUG_ON(off % RDS_FRAG_SIZE); + BUG_ON(!conn->c_loopback && off % RDS_FRAG_SIZE); BUG_ON(hdr_off != 0 && hdr_off != sizeof(struct rds_header)); /* Do not send cong updates to IB loopback */