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From: Navdeep Parhar <np@FreeBSD.org>
Date: Fri, 9 Sep 2016 17:15:16 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r305667 - head/sys/dev/cxgbe
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Author: np
Date: Fri Sep  9 17:15:16 2016
New Revision: 305667
URL: https://svnweb.freebsd.org/changeset/base/305667

Log:
  cxgbe(4): Avoid a NULL dereference in the clearstats ioctl handler.
  Port softc's are not initialized when the adapter is in recovery mode.

Modified:
  head/sys/dev/cxgbe/t4_main.c

Modified: head/sys/dev/cxgbe/t4_main.c
==============================================================================
--- head/sys/dev/cxgbe/t4_main.c	Fri Sep  9 16:18:44 2016	(r305666)
+++ head/sys/dev/cxgbe/t4_main.c	Fri Sep  9 17:15:16 2016	(r305667)
@@ -8867,6 +8867,8 @@ t4_ioctl(struct cdev *dev, unsigned long
 		if (port_id >= sc->params.nports)
 			return (EINVAL);
 		pi = sc->port[port_id];
+		if (pi == NULL)
+			return (EIO);
 
 		/* MAC stats */
 		t4_clr_port_stats(sc, pi->tx_chan);