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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
Date: Thu, 21 May 2015 08:32:53 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r283200 - stable/9/sys/kern
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Author: ae
Date: Thu May 21 08:32:52 2015
New Revision: 283200
URL: https://svnweb.freebsd.org/changeset/base/283200

Log:
  MFC r282594:
    m_dup() is supposed to give a writable copy of an mbuf chain. It uses
    m_dup_pkthdr(), that uses M_COPYFLAGS mask to copy m_flags field.
    If original mbuf chain has M_RDONLY flag, its copy also will have it.
    Reset this flag explicitly.

Modified:
  stable/9/sys/kern/uipc_mbuf.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/uipc_mbuf.c
==============================================================================
--- stable/9/sys/kern/uipc_mbuf.c	Thu May 21 08:28:48 2015	(r283199)
+++ stable/9/sys/kern/uipc_mbuf.c	Thu May 21 08:32:52 2015	(r283200)
@@ -867,6 +867,7 @@ m_dup(struct mbuf *m, int how)
 			}
 			if ((n->m_flags & M_EXT) == 0)
 				nsize = MHLEN;
+			n->m_flags &= ~M_RDONLY;
 		}
 		n->m_len = 0;