svn commit: r283200 - stable/9/sys/kern

[Andrey V. Elsukov]

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;