Commit e0b2ce02 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Thierry Reding

drm/tegra: Check syncpoint ID in the 'submit' IOCTL

In case of invalid syncpoint ID, the host1x_syncpt_get() returns NULL and
none of its users perform a check of the returned pointer later. Let's bail
out until it's too late.
Signed-off-by: Dmitry Osipenko's avatarDmitry Osipenko <digetx@gmail.com>
Reviewed-by: default avatarMikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent d0fbbdff
......@@ -393,6 +393,8 @@ int tegra_drm_submit(struct tegra_drm_context *context,
struct drm_tegra_waitchk __user *waitchks =
(void __user *)(uintptr_t)args->waitchks;
struct drm_tegra_syncpt syncpt;
struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
struct host1x_syncpt *sp;
struct host1x_job *job;
int err;
......@@ -522,6 +524,13 @@ int tegra_drm_submit(struct tegra_drm_context *context,
goto fail;
}
/* check whether syncpoint ID is valid */
sp = host1x_syncpt_get(host1x, syncpt.id);
if (!sp) {
err = -ENOENT;
goto fail;
}
job->is_addr_reg = context->client->ops->is_addr_reg;
job->syncpt_incrs = syncpt.incrs;
job->syncpt_id = syncpt.id;
......
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