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zyxel-vmg8825_b50b-cfw/package/busybox/patches-1.31.1/0964-udhcpc-fix-segmentation-fault-on-empty-bin-opt.patch
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2026-04-17 18:33:03 +02:00

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From 1f1988d5256c9705a4f296ed48cdb7e463525ba4 Mon Sep 17 00:00:00 2001
From: Michal Kazior <michal@plume.com>
Date: Wed, 25 Sep 2019 14:03:13 +0200
Subject: [PATCH] udhcpc: fix segmentation fault on empty bin opt
The following caused udhcpc to segfault:
busybox udhcpc -i lo -s /dev/null -x 0x3d:
function old new delta
udhcp_str2optset 629 641 +12
Signed-off-by: Michal Kazior <michal@plume.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
networking/udhcp/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 4a452cdb9..9ec752dfc 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -539,7 +539,7 @@ int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg,
if (optflag->flags == OPTION_BIN) {
val = strtok(NULL, ""); /* do not split "'q w e'" */
- trim(val);
+ if (val) trim(val);
} else
val = strtok(NULL, ", \t");
if (!val)
--
2.22.0