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From af6d64cfa4f8ff64da1b5cd6cacd06ae3c095c37 Mon Sep 17 00:00:00 2001
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From: "Alan T. DeKok" <aland@freeradius.org>
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Date: Mon, 3 Jul 2017 15:37:44 -0400
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Subject: [PATCH] FR-GV-303 - do memchr() of end-p, not q-p
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---
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src/modules/proto_dhcp/dhcp.c | 20 +++++++++-----------
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1 file changed, 9 insertions(+), 11 deletions(-)
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diff --git a/src/modules/proto_dhcp/dhcp.c b/src/modules/proto_dhcp/dhcp.c
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index a66a931cb..dbfe81747 100644
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--- a/src/modules/proto_dhcp/dhcp.c
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+++ b/src/modules/proto_dhcp/dhcp.c
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@@ -774,25 +774,23 @@ static int fr_dhcp_attr2vp(TALLOC_CTX *ctx, VALUE_PAIR **vp_p, uint8_t const *da
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* multiple additional VPs
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*/
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fr_cursor_init(&cursor, vp_p);
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- for (;;) {
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- q = memchr(p, '\0', q - p);
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+ while (p < end) {
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+ q = memchr(p, '\0', end - p);
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/* Malformed but recoverable */
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if (!q) q = end;
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fr_pair_value_bstrncpy(vp, (char const *)p, q - p);
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p = q + 1;
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+ if (p >= end) break;
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+
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/* Need another VP for the next round */
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- if (p < end) {
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- vp = fr_pair_afrom_da(ctx, vp->da);
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- if (!vp) {
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- fr_pair_list_free(vp_p);
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- return -1;
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- }
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- fr_cursor_insert(&cursor, vp);
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- continue;
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+ vp = fr_pair_afrom_da(ctx, vp->da);
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+ if (!vp) {
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+ fr_pair_list_free(vp_p);
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+ return -1;
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}
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- break;
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+ fr_cursor_insert(&cursor, vp);
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}
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}
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break;
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--
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2.13.2
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