git: 8ac3a1785343 - stable/12 - pfctl: improve error reporting for routehost

The branch stable/12 has been updated by kp:

URL: https://cgit.FreeBSD.org/src/commit/?id=8ac3a178534344d8b3b0295b831cab763d466c19

commit 8ac3a178534344d8b3b0295b831cab763d466c19
Author:     Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2022-01-05 20:31:02 +0000
Commit:     Kristof Provost <kp@FreeBSD.org>
CommitDate: 2022-02-18 10:15:31 +0000

    pfctl: improve error reporting for routehost
    
    If an invalid (i.e. overly long) interface name is specified error out
    immediately, rather than in expand_rule() so we point at the incorrect
    line.
    
    PR:             260958
    MFC after:      3 weeks
    Differential Revision:  https://reviews.freebsd.org/D34008
    
    (cherry picked from commit e68de6694381748b7578703b22580c0f17780b32)
---
 sbin/pfctl/parse.y | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sbin/pfctl/parse.y b/sbin/pfctl/parse.y
index f06462bda864..1a39e3b2b319 100644
--- a/sbin/pfctl/parse.y
+++ b/sbin/pfctl/parse.y
@@ -4536,6 +4536,10 @@ route_host	: STRING			{
 			$$ = calloc(1, sizeof(struct node_host));
 			if ($$ == NULL)
 				err(1, "route_host: calloc");
+			if (strlen($1) >= IFNAMSIZ) {
+				yyerror("interface name too long");
+				YYERROR;
+			}
 			$$->ifname = strdup($1);
 			set_ipmask($$, 128);
 			$$->next = NULL;
@@ -4545,8 +4549,13 @@ route_host	: STRING			{
 			struct node_host *n;
 
 			$$ = $3;
-			for (n = $3; n != NULL; n = n->next)
+			for (n = $3; n != NULL; n = n->next) {
+				if (strlen($2) >= IFNAMSIZ) {
+					yyerror("interface name too long");
+					YYERROR;
+				}
 				n->ifname = strdup($2);
+			}
 		}
 		;