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From cf9903466c1a2d18a701f3b5e8c7e03483e1244d Mon Sep 17 00:00:00 2001
From: Zdenek Dohnal <zdohnal@redhat.com>
Date: Mon, 14 Oct 2019 16:39:28 +0200
Subject: [PATCH] udev-configure-printer: Add checks for NULL
---
udev/udev-configure-printer.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/udev/udev-configure-printer.c b/udev/udev-configure-printer.c
index 83092fc21..d753bbeaf 100644
--- a/udev/udev-configure-printer.c
+++ b/udev/udev-configure-printer.c
@@ -1411,7 +1411,7 @@ for_each_matching_queue (struct device_uris *device_uris,
const char *printer_state_message = NULL;
int state = 0;
size_t i, l;
- char *this_device_uri_n, *device_uri_n;
+ char *this_device_uri_n = NULL, *device_uri_n = NULL;
const char *ps1, *ps2, *pi1, *pi2;
while (attr && ippGetGroupTag (attr) != IPP_TAG_PRINTER)
@@ -1448,6 +1448,8 @@ for_each_matching_queue (struct device_uris *device_uris,
for (i = 0; i < device_uris->n_uris; i++)
{
device_uri_n = normalize_device_uri(device_uris->uri[i]);
+ if (this_device_uri_n == NULL || device_uri_n == NULL)
+ goto skip;
/* As for the same device different URIs can come out when the
device is accessed via the usblp kernel module or via low-
level USB (libusb) we cannot simply compare URIs, must
@@ -1512,8 +1514,12 @@ for_each_matching_queue (struct device_uris *device_uris,
firstqueue = 0;
skip:
- free(device_uri_n);
- free(this_device_uri_n);
+ if (device_uri_n != NULL)
+ free(device_uri_n);
+ device_uri_n = NULL;
+ if (this_device_uri_n != NULL)
+ free(this_device_uri_n);
+ this_device_uri_n = NULL;
if (!attr)
break;
}
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