git: 26d1ad5a44e1 - main - netlink: snl_create_genl_msg_request() may fail due to ENOMEM

The branch main has been updated by glebius:

URL: https://cgit.FreeBSD.org/src/commit/?id=26d1ad5a44e17d2d8c48d36755567043349d8b63

commit 26d1ad5a44e17d2d8c48d36755567043349d8b63
Author:     Gleb Smirnoff <glebius@FreeBSD.org>
AuthorDate: 2025-01-11 04:58:08 +0000
Commit:     Gleb Smirnoff <glebius@FreeBSD.org>
CommitDate: 2025-01-11 04:58:08 +0000

    netlink: snl_create_genl_msg_request() may fail due to ENOMEM
    
    Reviewed by:            melifaro
    Differential Revision:  https://reviews.freebsd.org/D48310
---
 sys/netlink/netlink_snl_generic.h | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/sys/netlink/netlink_snl_generic.h b/sys/netlink/netlink_snl_generic.h
index 32b460c612bd..e2dc4d1bfffe 100644
--- a/sys/netlink/netlink_snl_generic.h
+++ b/sys/netlink/netlink_snl_generic.h
@@ -33,16 +33,24 @@
 
 /* Genetlink helpers */
 static inline struct nlmsghdr *
-snl_create_genl_msg_request(struct snl_writer *nw, int genl_family, uint8_t genl_cmd)
+snl_create_genl_msg_request(struct snl_writer *nw, uint16_t genl_family,
+    uint8_t genl_cmd)
 {
+	struct nlmsghdr *hdr;
+	struct genlmsghdr *ghdr;
+
 	assert(nw->hdr == NULL);
 
-	struct nlmsghdr *hdr = snl_reserve_msg_object(nw, struct nlmsghdr);
+	hdr = snl_reserve_msg_object(nw, struct nlmsghdr);
+	if (__predict_false(hdr == NULL))
+		return (NULL);
 	hdr->nlmsg_type = genl_family;
 	hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-	nw->hdr = hdr;
-	struct genlmsghdr *ghdr = snl_reserve_msg_object(nw, struct genlmsghdr);
+	ghdr = snl_reserve_msg_object(nw, struct genlmsghdr);
+	if (__predict_false(ghdr == NULL))
+		return (NULL);
 	ghdr->cmd = genl_cmd;
+	nw->hdr = hdr;
 
 	return (hdr);
 }