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Revision c66650d29764e228eba40b7a59fdb70fa6567daa authored by Kees Cook on 22 September 2023, 17:53:19 UTC, committed by Dan Williams on 22 September 2023, 21:31:04 UTC 
cxl/acpi: Annotate struct cxl_cxims_data with __counted_by
 
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

As found with Coccinelle[1], add __counted_by for struct cxl_cxims_data.
Additionally, since the element count member must be set before accessing
the annotated flexible array member, move its initialization earlier.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: linux-cxl@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20230922175319.work.096-kees@kernel.org
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 parent a76b625
Raw File
drm_gem_ttm_helper.h 
/* SPDX-License-Identifier: GPL-2.0-or-later */

#ifndef DRM_GEM_TTM_HELPER_H
#define DRM_GEM_TTM_HELPER_H

#include <linux/container_of.h>

#include <drm/drm_device.h>
#include <drm/drm_gem.h>
#include <drm/ttm/ttm_bo.h>

struct iosys_map;

#define drm_gem_ttm_of_gem(gem_obj) \
	container_of(gem_obj, struct ttm_buffer_object, base)

void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
			    const struct drm_gem_object *gem);
int drm_gem_ttm_vmap(struct drm_gem_object *gem,
		     struct iosys_map *map);
void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
			struct iosys_map *map);
int drm_gem_ttm_mmap(struct drm_gem_object *gem,
		     struct vm_area_struct *vma);

int drm_gem_ttm_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
				uint32_t handle, uint64_t *offset);

#endif
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