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sd-dhcp: make sure we can not fill options so much that there is no space for END
[elogind.git]
/
src
/
libsystemd-network
/
dhcp-option.c
diff --git
a/src/libsystemd-network/dhcp-option.c
b/src/libsystemd-network/dhcp-option.c
index 68950923ddd9ea8265b4ae7cd509aa7b31b316fe..24f678c100b41b39fe84b3cbd0cd9ba71e1e009f 100644
(file)
--- a/
src/libsystemd-network/dhcp-option.c
+++ b/
src/libsystemd-network/dhcp-option.c
@@
-31,6
+31,10
@@
int dhcp_option_append(uint8_t options[], size_t size, size_t *offset,
assert(options);
assert(offset);
+ if (code != DHCP_OPTION_END)
+ /* always make sure there is space for an END option */
+ size --;
+
switch (code) {
case DHCP_OPTION_PAD: