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Fix regression from r248371. We need to copy packet header to new

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mbuf. Unlike in the pre-r248371 code, assert that M_PKTHDR is set
only on a first mbuf.

Reported & tested by:	Andriy Voskoboinyk <s3erios gmail.com>
Sponsored by:		Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2015-10-07 12:40:00 +00:00
parent 20e8b32db4
commit e40e8705db
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=288990
1 changed files with 5 additions and 0 deletions
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5
sys/kern/uipc_mbuf.c
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@ -1867,6 +1867,11 @@ m_unshare(struct mbuf *m0, int how)
m_freem(m0);
return (NULL);
}
if (m->m_flags & M_PKTHDR) {
KASSERT(mprev == NULL, ("%s: m0 %p, m %p has M_PKTHDR",
__func__, m0, m));
m_move_pkthdr(n, m);
}
len = m->m_len;
off = 0;
mfirst = n;