st-probe: Fix segfault when programmer is already busy and null pointers are in the...

[fw/stlink] / src / stlink-usb.c

diff --git a/src/stlink-usb.c b/src/stlink-usb.c
index ab555785c27ac4b1cf68afacfae9fabe3e6073b3..8fed467ba7432c55aca960287fbacf5fcb80a675 100644 (file)
--- a/src/stlink-usb.c
+++ b/src/stlink-usb.c
@@ -15,6 +15,9 @@
 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
 
 void _stlink_usb_close(stlink_t* sl) {
+    if (!sl)
+        return;
+
     struct stlink_libusb * const handle = sl->backend_data;
     // maybe we couldn't even get the usb device?
     if (handle != NULL) {