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From: John Baldwin <jhb@FreeBSD.org>
Date: Sat, 17 May 2014 02:45:05 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r266281 - head/sys/dev/aac
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Author: jhb
Date: Sat May 17 02:45:04 2014
New Revision: 266281
URL: http://svnweb.freebsd.org/changeset/base/266281

Log:
  Clear the data buffer length field when freeing a command structure so that
  it doesn't leak through when the command structure is reused for a user
  command without a data buffer.
  
  PR:		amd64/189668
  Tested by:	Pete Long <pete@nrth.org>
  MFC after:	1 week

Modified:
  head/sys/dev/aac/aac.c

Modified: head/sys/dev/aac/aac.c
==============================================================================
--- head/sys/dev/aac/aac.c	Sat May 17 02:39:20 2014	(r266280)
+++ head/sys/dev/aac/aac.c	Sat May 17 02:45:04 2014	(r266281)
@@ -1408,6 +1408,7 @@ aac_release_command(struct aac_command *
 	fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
 
 	/* (re)initialize the command/FIB */
+	cm->cm_datalen = 0;
 	cm->cm_sgtable = NULL;
 	cm->cm_flags = 0;
 	cm->cm_complete = NULL;