From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Mon, 9 Jan 2017 11:54:54 +0000 (+0100)
Subject: core: fix segfault in gpiod_line_find_by_name()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5c055d64730a640643d076e68d59cf884456b7ee;p=qemu-gpiodev%2Flibgpiod.git

core: fix segfault in gpiod_line_find_by_name()

We need to check whether gpiod_line_name() didn't return NULL.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/core.c b/core.c
index de5dff2..78e25f2 100644
--- a/core.c
+++ b/core.c
@@ -513,6 +513,7 @@ struct gpiod_line * gpiod_line_find_by_name(const char *name)
 	struct gpiod_line_iter line_iter;
 	struct gpiod_chip *chip;
 	struct gpiod_line *line;
+	const char *line_name;
 
 	chip_iter = gpiod_chip_iter_new();
 	if (!chip_iter)
@@ -521,6 +522,10 @@ struct gpiod_line * gpiod_line_find_by_name(const char *name)
 	gpiod_foreach_chip(chip_iter, chip) {
 		gpiod_line_iter_init(&line_iter, chip);
 		gpiod_foreach_line(&line_iter, line) {
+			line_name = gpiod_line_name(line);
+			if (!line_name)
+				continue;
+
 			if (strcmp(gpiod_line_name(line), name) == 0) {
 				/* TODO A separate function for that maybe? */
 				closedir(chip_iter->dir);