git: 6894d9a74aa1 - stable/14 - netmap: Don't assume that user-provided strings are nul-terminated

The branch stable/14 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=6894d9a74aa1c588d77c131568bd87571bd15316

commit 6894d9a74aa1c588d77c131568bd87571bd15316
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2026-07-08 17:11:05 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2026-07-27 14:05:07 +0000

    netmap: Don't assume that user-provided strings are nul-terminated
    
    MFC after:      1 week
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit e1ab35148dd425340a88a2acaf10b972cb119f8f)
---
 sys/dev/netmap/netmap_bdg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/dev/netmap/netmap_bdg.c b/sys/dev/netmap/netmap_bdg.c
index bcb45f55d160..1fe5052448f8 100644
--- a/sys/dev/netmap/netmap_bdg.c
+++ b/sys/dev/netmap/netmap_bdg.c
@@ -1043,6 +1043,10 @@ netmap_bdg_config(struct nm_ifreq *nr)
 	struct nm_bridge *b;
 	int error = EINVAL;
 
+	if (strnlen(nr->nifr_name, sizeof(nr->nifr_name)) >=
+	    sizeof(nr->nifr_name))
+		return error;
+
 	NMG_LOCK();
 	b = nm_find_bridge(nr->nifr_name, 0, NULL);
 	if (!b) {