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buffer: fix overflow check in evbuffer_expand_singlechain()

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Refs: #306
Fixes: #340
Fixes: 20d6d4458bee5d88bda1511c225c25b2d3198d6c
This commit is contained in:
Azat Khuzhin 2016-06-21 19:49:57 +03:00
parent 48dab7aa33
commit a3f4ccd1a1
1 changed files with 1 additions and 2 deletions
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3
buffer.c
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@ -1982,8 +1982,7 @@ evbuffer_expand_singlechain(struct evbuffer *buf, size_t datlen)
/* Would expanding this chunk be affordable and worthwhile? */
if (CHAIN_SPACE_LEN(chain) < chain->buffer_len / 8 ||
chain->off > MAX_TO_COPY_IN_EXPAND ||
(datlen < EVBUFFER_CHAIN_MAX &&
EVBUFFER_CHAIN_MAX - datlen >= chain->off)) {
datlen >= (EVBUFFER_CHAIN_MAX - chain->off)) {
/* It's not worth resizing this chain. Can the next one be
* used? */
if (chain->next && CHAIN_SPACE_LEN(chain->next) >= datlen) {