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o Initialise each mbuf's m_len to 0 in m_getm(); mb_put_mem() depends

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on this.
o Update the `cur' pointer in the cluster loop in m_getm() to avoid
  incorrect truncation and leaked mbufs.

Reviewed by:	bmilekic
Approved by:	re
This commit is contained in:
Tim J. Robbins 2002-11-27 04:26:00 +00:00
parent 647501a046
commit fef82663b8
1 changed files with 3 additions and 1 deletions
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4
sys/kern/subr_mbuf.c
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@ -1192,6 +1192,7 @@ m_getm(struct mbuf *m, int len, int how, short type)
if (mb == NULL)
goto failed;
_mb_setup(mb, type);
mb->m_len = 0;
persist = (i != (num - 1) || rem > 0) ? MBP_PERSIST : 0;
mb->m_ext.ext_buf = (caddr_t)mb_alloc(&mb_list_clust,
@ -1207,7 +1208,7 @@ m_getm(struct mbuf *m, int len, int how, short type)
if (cur == NULL)
top = cur = mb;
else
cur->m_next = mb;
cur = (cur->m_next = mb);
}
if (rem > 0) {
if (cchnum >= 0) {
@ -1222,6 +1223,7 @@ m_getm(struct mbuf *m, int len, int how, short type)
mb = m_get(how, type);
}
if (mb != NULL) {
mb->m_len = 0;
if (cur == NULL)
top = mb;
else