hw/xfree86: fix segfault in config parser when config dir is missing

Treat a scandir error from a missing (or unusable) directory return as
if it simply returned no files at all, which is what we want.

cc: Paulo Zanoni <przanoni@gmail.com>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/xfree86/parser/scan.c b/hw/xfree86/parser/scan.c
index 9099227bb..156bc299a 100644
--- a/hw/xfree86/parser/scan.c
+++ b/hw/xfree86/parser/scan.c
@@ -852,6 +852,10 @@ OpenConfigDir(const char *path, const char *cmdline, const char *projroot,
 
 		/* match files named *.conf */
 		num = scandir(dirpath, &list, ConfigFilter, alphasort);
+		if (num < 0) {
+			list = NULL;
+			num = 0;
+		}
 		found = AddConfigDirFiles(dirpath, list, num);
 		if (!found) {
 			free(dirpath);