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If mbuf is not writable get a writable copy before invoking

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m_pullup(9).

Tested by:	Garrett Cooper < yanefbsd <at> gmail dot com >
This commit is contained in:
yongari 2008-09-30 04:52:30 +00:00
parent b708fede3f
commit 8468f28e4d
1 changed files with 10 additions and 1 deletions
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11
sys/dev/msk/if_msk.c
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@ -2559,7 +2559,16 @@ msk_encap(struct msk_if_softc *sc_if, struct mbuf **m_head)
struct ip *ip;
struct tcphdr *tcp;
/* TODO check for M_WRITABLE(m) */
if (M_WRITABLE(m) == 0) {
/* Get a writable copy. */
m = m_dup(*m_head, M_DONTWAIT);
m_freem(*m_head);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
*m_head = m;
}
offset = sizeof(struct ether_header);
m = m_pullup(m, offset);