CHAOS: res_pjsip_diversion avoid crash if allocation fails

Validate ast_malloc buffer returned before using it in
set_redirecting_value().

ASTERISK-25323

Change-Id: I15d2ed7cb0546818264c0bf251aa40adeae83253

diff --git a/res/res_pjsip_diversion.c b/res/res_pjsip_diversion.c
index 3dfae45..ea2c7cd 100644 (file)
--- a/res/res_pjsip_diversion.c
+++ b/res/res_pjsip_diversion.c
@@ -117,7 +117,9 @@ static void set_redirecting_value(char **dst, const pj_str_t *src)
 {
        ast_free(*dst);
        *dst = ast_malloc(pj_strlen(src) + 1);
-       ast_copy_pj_str(*dst, src, pj_strlen(src) + 1);
+       if (*dst) {
+               ast_copy_pj_str(*dst, src, pj_strlen(src) + 1);
+       }
 }
 
 static void set_redirecting_id(pjsip_name_addr *name_addr, struct ast_party_id *data,