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evdev: prevent unterminated device name
author
Peter Hutterer
<peter.hutterer@who-t.net>
Wed, 7 Aug 2013 01:04:41 +0000
(11:04 +1000)
committer
Jonas Ådahl
<jadahl@gmail.com>
Sun, 10 Nov 2013 16:51:32 +0000
(17:51 +0100)
The kernel copies up to sizeof(devname) bytes but doesn't null-terminate the
string if the device name exceeds the size of the supplied buffer.
src/evdev.c
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diff --git
a/src/evdev.c
b/src/evdev.c
index
fc5004c
..
27296f8
100644
(file)
--- a/
src/evdev.c
+++ b/
src/evdev.c
@@
-575,6
+575,7
@@
evdev_device_create(struct weston_seat *seat, const char *path, int device_fd)
device->fd = device_fd;
ioctl(device->fd, EVIOCGNAME(sizeof(devname)), devname);
+ devname[sizeof(devname) - 1] = '\0';
device->devname = strdup(devname);
if (!evdev_handle_device(device)) {