Date: Thu, 7 May 2015 18:35:02 +0000 (UTC) From: "Andrey V. Elsukov" <ae@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r282594 - head/sys/kern Message-ID: <201505071835.t47IZ2BB087269@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: ae Date: Thu May 7 18:35:01 2015 New Revision: 282594 URL: https://svnweb.freebsd.org/changeset/base/282594 Log: 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. MFC after: 2 weeks Modified: head/sys/kern/uipc_mbuf.c Modified: head/sys/kern/uipc_mbuf.c ============================================================================== --- head/sys/kern/uipc_mbuf.c Thu May 7 18:32:11 2015 (r282593) +++ head/sys/kern/uipc_mbuf.c Thu May 7 18:35:01 2015 (r282594) @@ -813,6 +813,7 @@ 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;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201505071835.t47IZ2BB087269>