svn commit: r289012 - head/sys/dev/wpi
Adrian Chadd
adrian at FreeBSD.org
Thu Oct 8 07:22:41 UTC 2015
Author: adrian
Date: Thu Oct 8 07:22:40 2015
New Revision: 289012
URL: https://svnweb.freebsd.org/changeset/base/289012
Log:
wpi(4): check size before transmitting frames
In addition to https://bz-attachments.freebsd.org/attachment.cgi?id=156112;
fixes https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=144987.
Tested:
* Tested with Intel 3945BG, STA mode
Submitted by: <s3erios at gmail.com>
Differential Revision: https://reviews.freebsd.org/D3762
Modified:
head/sys/dev/wpi/if_wpi.c
Modified: head/sys/dev/wpi/if_wpi.c
==============================================================================
--- head/sys/dev/wpi/if_wpi.c Thu Oct 8 07:21:36 2015 (r289011)
+++ head/sys/dev/wpi/if_wpi.c Thu Oct 8 07:22:40 2015 (r289012)
@@ -2603,6 +2603,11 @@ wpi_cmd2(struct wpi_softc *sc, struct wp
hdrlen = ieee80211_anyhdrsize(wh);
totlen = buf->m->m_pkthdr.len;
+ if (__predict_false(totlen < sizeof(struct ieee80211_frame_min))) {
+ error = EINVAL;
+ goto fail;
+ }
+
if (hdrlen & 3) {
/* First segment length must be a multiple of 4. */
pad = 4 - (hdrlen & 3);
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