Date: Fri, 11 Jan 2002 11:00:45 +0900 (JST) From: Toshinori Hirano <hirano@cc.kagu.sut.ac.jp> To: freebsd-bugs@FreeBSD.ORG Subject: patch of m_pulldown function (4.4 release) Message-ID: <20020111.110045.36849318.hirano@cc.kagu.sut.ac.jp>
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Dear bug report team.
Please, check m_pulldown() of 4.4 release.
This patch check that whether the mbuf "n->m_next" is a shared cluster
or not, and the target is contained in the mbuf "n" and "n->m_next".
I removed "(off == 0 || offp)" because the code within if clause
set "off" to "0".
-----
Toshinori Hirano
E-mail: hirano@cc.kagu.sut.ac.jp
--- src/sys/kern/uipc_mbuf2.c.ORG Tue Jul 3 20:01:37 2001
+++ src/sys/kern/uipc_mbuf2.c Fri Jan 11 09:35:35 2002
@@ -193,8 +193,8 @@
m_adj(n->m_next, tlen);
goto ok;
}
- if ((off == 0 || offp) && M_LEADINGSPACE(n->m_next) >= hlen &&
- !sharedcluster) {
+ if (M_LEADINGSPACE(n->m_next) >= hlen &&
+ !M_SHAREDCLUSTER(n->m_next) && n->m_next->m_len + hlen >= len) {
n->m_next->m_data -= hlen;
n->m_next->m_len += hlen;
bcopy(mtod(n, caddr_t) + off, mtod(n->m_next, caddr_t), hlen);
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