Merge tag 'net-20251218' of https://source.denx.de/u-boot/custodians/u-boot-net

Pull request net-20251218.

net-lwip:
- Avoid NULL dereference in _set_cacert()
- Fix filename handling in TFTP

cmd/lwip/wget.c

@@ -180,6 +180,8 @@ int do_wget(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
 	ulong dst_addr;
 	char nurl[1024];
 
+	wget_info = &default_wget_info;
+
 #if CONFIG_IS_ENABLED(WGET_CACERT)
 	if (argc == 4 && !strncmp(argv[1], "cacert", strlen("cacert")))
 		return set_cacert(argv[2], argv[3]);
@@ -214,7 +216,6 @@ int do_wget(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
 	if (parse_legacy_arg(url, nurl, sizeof(nurl)))
 		return CMD_RET_FAILURE;
 
-	wget_info = &default_wget_info;
 	if (wget_do_request(dst_addr, nurl))
 		return CMD_RET_FAILURE;
 

net/lwip/tftp.c

@@ -279,7 +279,7 @@ int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	if (!arg)
 		arg = net_boot_file_name;
 
-	if (arg) {
+	if (*arg) {
 		/* Parse [ip:[port:]]fname */
 		i = 0;
 		while ((*(words + i) = strsep(&arg, ":")))
@@ -342,6 +342,7 @@ int do_tftpb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	if (tftp_loop(eth_get_dev(), laddr, fname, srvip, port) < 0)
 		ret = CMD_RET_FAILURE;
 out:
-	free(arg);
+	if (arg != net_boot_file_name)
+		free(arg);
 	return ret;
 }