intf_line.c: Make e1d_find_intf_by_usb_serial safe for empty string

Avoid segfault in case the empty string is passed as serial_str. Change-Id: Ia69912cb714441415d8decd68890d1b97b77132d
2022-03-28 10:11:05 +02:00 · 2022-03-28 10:11:05 +02:00 · 2819d3fb79
parent 591249a3c2
commit 2819d3fb79
1 changed files with 3 additions and 0 deletions
--- a/src/intf_line.c
+++ b/src/intf_line.c
@ -100,6 +100,9 @@ e1d_find_intf_by_usb_serial(struct e1_daemon *e1d, const char *serial_str)
 {
 	struct e1_intf *intf;

+	if (!serial_str)
+		return NULL;
+
 	llist_for_each_entry(intf, &e1d->interfaces, list)
 		if (intf->usb.serial_str && !strcmp(intf->usb.serial_str, serial_str))
 			return intf;