From: Michael Gernoth <michael@gernoth.net>
Date: Sat, 31 Jan 2015 23:57:30 +0000 (+0100)
Subject: avoid possible null-pointer dereference in error-path
X-Git-Tag: v0.100~14
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/commitdiff_plain/325ed7030d39536af863e9c49b5fa04ac0a28d5d?ds=sidebyside

avoid possible null-pointer dereference in error-path
---

diff --git a/hmcfgusb.c b/hmcfgusb.c
index 0e11866..83c9719 100644
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -285,8 +285,11 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 	if (err != 0) {
 		fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
 		libusb_free_transfer(transfer);
-		cb_data->dev->transfer = NULL;
-		free(cb_data);
+		if (cb_data) {
+			if (cb_data->dev)
+				cb_data->dev->transfer = NULL;
+			free(cb_data);
+		}
 	}
 }