Messages in this thread Patch in this message | | | Date | Mon, 22 Oct 2012 14:12:54 -0400 | From | Jay Fenlason <> | Subject | [PATCH] prevent CVE-2012-2372 rds-ping causes kernel panic |
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If you use rds-ping of the local IP address of some Infiniband HCAs (QLogic, possibly others) the machine will panic with a BUG_ON due to an overly restrictive check. Loosen the restriction a bit
This should have gotten sent a while ago (it was first noticed in https://bugzilla.redhat.com/show_bug.cgi?id=803936 and patched in kernel-2.6.32-275.el6) but I got confused about its embargo status and lost it.
Signed-off-by: Jay Fenlason <fenlason@redhat.com>
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c index e590949..7920c85 100644 --- a/net/rds/ib_send.c +++ b/net/rds/ib_send.c @@ -544,7 +544,7 @@ 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 */
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