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terminal: verify kernel-returned DRM events are not truncated

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Make sure the kernel always returns events properly. This is guaranteed
right now, otherwise, we do something really wrong. But lets be sure and
verify the received values properly. This also silences some coverity
warnings.
This commit is contained in:
David Herrmann 2014-09-23 13:51:42 +02:00
parent c5e6bfc6bc
commit a908d21355
1 changed files with 1 additions and 1 deletions
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2
src/libsystemd-terminal/grdev-drm.c
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@ -2223,7 +2223,7 @@ static int grdrm_card_io_fn(sd_event_source *s, int fd, uint32_t revents, void *
for (i = 0; i < l; i += event->length) {
event = (void*)&buf[i];
if (i + event->length > l) {
if (i + (ssize_t)sizeof(*event) > l || i + (ssize_t)event->length > l) {
log_debug("grdrm: %s/%s: truncated event", card->base.session->name, card->base.name);
break;
}