svn commit: r290609 - stable/8/sys/dev/usb/net

Hans Petter Selasky hselasky at
Mon Nov 9 11:29:56 UTC 2015

Author: hselasky
Date: Mon Nov  9 11:29:54 2015
New Revision: 290609

  MFC r290441:
  Fix for unaligned IP-header.
  The mbuf length fields must be set before m_adj() is called else
  m_adj() will not always adjust the mbuf and an unaligned read
  exception can trigger inside the network stack. This can happen on
  platforms where unaligned reads are not supported. Adjust a length
  check to include the 2-byte ethernet alignment while at it.

Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/dev/   (props changed)
  stable/8/sys/dev/usb/   (props changed)

Modified: stable/8/sys/dev/usb/net/if_cdce.c
--- stable/8/sys/dev/usb/net/if_cdce.c	Mon Nov  9 11:27:31 2015	(r290608)
+++ stable/8/sys/dev/usb/net/if_cdce.c	Mon Nov  9 11:29:54 2015	(r290609)
@@ -1381,6 +1381,7 @@ cdce_ncm_bulk_read_callback(struct usb_x
 			/* check if we have a buffer */
 			if (m) {
+				m->m_len = m->m_pkthdr.len = temp + ETHER_ALIGN;
 				m_adj(m, ETHER_ALIGN);
 				usbd_copy_out(pc, offset, m->m_data, temp);

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