Author: np
Date: Mon May 15 18:18:32 2017
New Revision: 318307
URL: https://svnweb.freebsd.org/changeset/base/318307
Log:
cxgbe(4): Avoid an out of bounds access when an attempt to unbind a tx
queue from a traffic class fails.
Reported by: x ksi <s3810 at pjwstk edu pl>
MFC after: 3 days
Modified:
head/sys/dev/cxgbe/t4_sge.c
Modified: head/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- head/sys/dev/cxgbe/t4_sge.c Mon May 15 18:07:57 2017 (r318306)
+++ head/sys/dev/cxgbe/t4_sge.c Mon May 15 18:18:32 2017 (r318307)
@@ -5323,7 +5323,7 @@ sysctl_tc(SYSCTL_HANDLER_ARGS)
tc->refcount--;
}
txq->tc_idx = tc_idx;
- } else {
+ } else if (tc_idx != -1) {
tc = &pi->sched_params->cl_rl[tc_idx];
MPASS(tc->refcount > 0);
tc->refcount--;
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