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Groups > linux.kernel > #1613847
| From | Jani Nikula <jani.nikula@linux.intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] drm/i915: disable KASAN for handlers |
| Date | 2017-03-31 12:30 +0200 |
| Message-ID | <tr1YB-3mA-1@gated-at.bofh.it> (permalink) |
| References | <tqESn-4kQ-43@gated-at.bofh.it> <tqZaq-1ug-7@gated-at.bofh.it> |
| Organization | Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo |
On Fri, 31 Mar 2017, Zhenyu Wang <zhenyuw@linux.intel.com> wrote: > On 2017.03.30 11:46:27 +0200, Jiri Slaby wrote: >> 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 >> > > Applied this, we'd better cleanup legacy usage to current i915 mmio > reg define. Thanks! Hmmh, that was a bit fast, there was a related discussion going in [1]. BR, Jani. [1] http://mid.mail-archive.com/20170320215713.3086140-1-arnd@arndb.de -- Jani Nikula, Intel Open Source Technology Center
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[PATCH] drm/i915: disable KASAN for handlers Jiri Slaby <jslaby@suse.cz> - 2017-03-30 11:50 +0200
Re: [PATCH] drm/i915: disable KASAN for handlers Zhenyu Wang <zhenyuw@linux.intel.com> - 2017-03-31 09:30 +0200
Re: [PATCH] drm/i915: disable KASAN for handlers Jani Nikula <jani.nikula@linux.intel.com> - 2017-03-31 12:30 +0200
Re: [PATCH] drm/i915: disable KASAN for handlers Arnd Bergmann <arnd@arndb.de> - 2017-03-31 13:30 +0200
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