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authorAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>2017-01-20 16:28:45 +0200
committerJani Nikula <jani.nikula@intel.com>2017-01-25 12:42:50 +0200
commit6d1d427a4e24c403b4adf928d61994bdaa0ca03a (patch)
tree5c33ee9076e10ee4258fd3049c56f4d431e5dc33
parent3781bd6e7d64d5f5bea9fdee11ab9460a700c0e4 (diff)
downloadlinux-6d1d427a4e24c403b4adf928d61994bdaa0ca03a.tar.gz
drm/i915: Check for NULL atomic state in intel_crtc_disable_noatomic()
In intel_crtc_disable_noatomic(), bail on a failure to allocate an atomic state to avoid a NULL pointer dereference. Fixes: 4a80655827af ("drm/i915: Pass atomic state to crtc enable/disable functions") Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: intel-gfx@lists.freedesktop.org Cc: <stable@vger.kernel.org> # v4.9+ Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-4-git-send-email-ander.conselvan.de.oliveira@intel.com (cherry picked from commit 31bb2ef97ea9db343348f9b5ccaa9bb6f48fc655) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
-rw-r--r--drivers/gpu/drm/i915/intel_display.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7a9040fc6e5a..f6dd073afdc9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6850,6 +6850,12 @@ static void intel_crtc_disable_noatomic(struct drm_crtc *crtc)
}
state = drm_atomic_state_alloc(crtc->dev);
+ if (!state) {
+ DRM_DEBUG_KMS("failed to disable [CRTC:%d:%s], out of memory",
+ crtc->base.id, crtc->name);
+ return;
+ }
+
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
/* Everything's already locked, -EDEADLK can't happen. */