Prevent OOM DOS

diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 6a1d1b4bdcc2caae05a79bfeda822f9339c1304d..b5665ee54283d1598a55fe572171f5b376fd74c1 100644 (file)
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -317,6 +317,8 @@ static uint8_t* odhcp6c_resize_state(enum odhcp6c_state state, ssize_t len)
 {
        if (len == 0)
                return state_data[state] + state_len[state];
+       else if (state_len[state] + len > 1024)
+               return NULL;
 
        uint8_t *n = realloc(state_data[state], state_len[state] + len);
        if (n || state_len[state] + len == 0) {