From: Jiri Slaby <jslaby@suse.cz>
To: zhenyuw@linux.intel.com
Cc: intel-gvt-dev@lists.freedesktop.org, Jiri Slaby <jslaby@suse.cz>,
intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org,
Daniel Vetter <daniel.vetter@intel.com>,
Martin Liska <mliska@suse.cz>, Zhi Wang <zhi.a.wang@intel.com>
Subject: [PATCH] drm/i915: disable KASAN for handlers
Date: Thu, 30 Mar 2017 11:46:27 +0200 [thread overview]
Message-ID: <20170330094627.29460-1-jslaby@suse.cz> (raw)
Handlers are currently the only blocker to compile the kernel with gcc 7
and KASAN+use-after-scope enabled:
drivers/gpu/drm/i915/gvt/handlers.c:2200:1: error: the frame size of 43760 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
drivers/gpu/drm/i915/gvt/handlers.c:2402:1: error: the frame size of 9400 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
drivers/gpu/drm/i915/gvt/handlers.c:2628:1: error: the frame size of 11256 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
It is due to many expansions of MMIO_* macros in init_generic_mmio_info.
INTEL_GVT_MMIO_OFFSET generates for each such line a __reg and an
offset. There are too many for KASAN to keep up.
So disable KASAN for this file.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Martin Liska <mliska@suse.cz>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: intel-gvt-dev@lists.freedesktop.org
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
---
drivers/gpu/drm/i915/gvt/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/gvt/Makefile b/drivers/gpu/drm/i915/gvt/Makefile
index b123c20e2097..942f1849d194 100644
--- a/drivers/gpu/drm/i915/gvt/Makefile
+++ b/drivers/gpu/drm/i915/gvt/Makefile
@@ -6,3 +6,5 @@ GVT_SOURCE := gvt.o aperture_gm.o handlers.o vgpu.o trace_points.o firmware.o \
ccflags-y += -I$(src) -I$(src)/$(GVT_DIR) -Wall
i915-y += $(addprefix $(GVT_DIR)/, $(GVT_SOURCE))
obj-$(CONFIG_DRM_I915_GVT_KVMGT) += $(GVT_DIR)/kvmgt.o
+
+KASAN_SANITIZE_handlers.o := n
--
2.12.2
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next reply other threads:[~2017-03-30 9:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-30 9:46 Jiri Slaby [this message]
2017-03-31 7:21 ` [PATCH] drm/i915: disable KASAN for handlers Zhenyu Wang
2017-03-31 10:29 ` Jani Nikula
2017-03-31 11:23 ` Arnd Bergmann
2017-07-18 5:48 ` Jiri Slaby
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