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Fix a use-after-free bug that could cause multi-link fragment reassembly to

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fail for a long time (until the incoming sequence numbers wrapped around).

Reported by:	Matthew Impett <mimpett@Glue.umd.edu>
MFC after:	3 days
This commit is contained in:
Archie Cobbs 2003-03-05 23:12:59 +00:00
parent 31eac03b4b
commit 2b2a8188b1
1 changed files with 4 additions and 2 deletions
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6
sys/netgraph/ng_ppp.c
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@ -1418,6 +1418,7 @@ ng_ppp_frag_checkstale(node_p node)
meta_p meta;
int i, seq;
item_p item;
int endseq;
now.tv_sec = 0; /* uninitialized state */
while (1) {
@ -1468,11 +1469,12 @@ ng_ppp_frag_checkstale(node_p node)
}
/* Extract completed packet */
endseq = end->seq;
ng_ppp_get_packet(node, &m, &meta);
/* Bump MSEQ if necessary */
if (MP_RECV_SEQ_DIFF(priv, priv->mseq, end->seq) < 0) {
priv->mseq = end->seq;
if (MP_RECV_SEQ_DIFF(priv, priv->mseq, endseq) < 0) {
priv->mseq = endseq;
for (i = 0; i < priv->numActiveLinks; i++) {
struct ng_ppp_link *const alink =
&priv->links[priv->activeLinks[i]];