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udev: fix a race condition if a device disappears before we get a handle

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If the device disappears too quickly, the device is NULL, the sysname is NULL
and that causes a segfault in strcmp.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-02-18 13:36:44 +10:00
parent a138069d5c
commit 413c29fef7
1 changed files with 2 additions and 0 deletions
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2
src/udev-seat.c
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@ -158,6 +158,8 @@ udev_input_add_devices(struct udev_input *input, struct udev *udev)
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(udev, path);
if (!device)
continue;
sysname = udev_device_get_sysname(device);
if (strncmp("event", sysname, 5) != 0) {