From ff90e006773c6d219fcc3646420d373fdbd32f33 Mon Sep 17 00:00:00 2001 From: Sean Bright Date: Mon, 13 Jul 2020 16:42:40 -0400 Subject: [PATCH] acl.c: Coerce a NULL pointer into the empty string If an ACL is misconfigured in the realtime database (for instance, the "rule" is blank) and Asterisk attempts to read the ACL, Asterisk will crash. ASTERISK-28978 #close Change-Id: Ic1536c4df856231bfd2da00128f7822224d77610 --- main/acl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/main/acl.c b/main/acl.c index 3d32976857..b1b838fd22 100644 --- a/main/acl.c +++ b/main/acl.c @@ -580,7 +580,7 @@ static struct ast_ha *append_ha_core(const char *sense, const char *stuff, struc struct ast_ha *ha; struct ast_ha *prev = NULL; struct ast_ha *ret; - char *tmp, *list = ast_strdupa(stuff); + char *tmp, *list = ast_strdupa(stuff ?: ""); char *address = NULL, *mask = NULL; int addr_is_v4; int allowing = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW;