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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_format_helper.h 
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2016 Noralf Trønnes
 */

#ifndef __LINUX_DRM_FORMAT_HELPER_H
#define __LINUX_DRM_FORMAT_HELPER_H

#include <linux/types.h>

struct drm_device;
struct drm_format_info;
struct drm_framebuffer;
struct drm_rect;

struct iosys_map;

unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format,
				const struct drm_rect *clip);

void drm_fb_memcpy(struct iosys_map *dst, const unsigned int *dst_pitch,
		   const struct iosys_map *src, const struct drm_framebuffer *fb,
		   const struct drm_rect *clip);
void drm_fb_swab(struct iosys_map *dst, const unsigned int *dst_pitch,
		 const struct iosys_map *src, const struct drm_framebuffer *fb,
		 const struct drm_rect *clip, bool cached);
void drm_fb_xrgb8888_to_rgb332(struct iosys_map *dst, const unsigned int *dst_pitch,
			       const struct iosys_map *src, const struct drm_framebuffer *fb,
			       const struct drm_rect *clip);
void drm_fb_xrgb8888_to_rgb565(struct iosys_map *dst, const unsigned int *dst_pitch,
			       const struct iosys_map *src, const struct drm_framebuffer *fb,
			       const struct drm_rect *clip, bool swab);
void drm_fb_xrgb8888_to_xrgb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
				 const struct iosys_map *src, const struct drm_framebuffer *fb,
				 const struct drm_rect *clip);
void drm_fb_xrgb8888_to_argb1555(struct iosys_map *dst, const unsigned int *dst_pitch,
				 const struct iosys_map *src, const struct drm_framebuffer *fb,
				 const struct drm_rect *clip);
void drm_fb_xrgb8888_to_rgba5551(struct iosys_map *dst, const unsigned int *dst_pitch,
				 const struct iosys_map *src, const struct drm_framebuffer *fb,
				 const struct drm_rect *clip);
void drm_fb_xrgb8888_to_rgb888(struct iosys_map *dst, const unsigned int *dst_pitch,
			       const struct iosys_map *src, const struct drm_framebuffer *fb,
			       const struct drm_rect *clip);
void drm_fb_xrgb8888_to_argb8888(struct iosys_map *dst, const unsigned int *dst_pitch,
				 const struct iosys_map *src, const struct drm_framebuffer *fb,
				 const struct drm_rect *clip);
void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
				    const struct iosys_map *src, const struct drm_framebuffer *fb,
				    const struct drm_rect *clip);
void drm_fb_xrgb8888_to_argb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
				    const struct iosys_map *src, const struct drm_framebuffer *fb,
				    const struct drm_rect *clip);
void drm_fb_xrgb8888_to_gray8(struct iosys_map *dst, const unsigned int *dst_pitch,
			      const struct iosys_map *src, const struct drm_framebuffer *fb,
			      const struct drm_rect *clip);

int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t dst_format,
		const struct iosys_map *src, const struct drm_framebuffer *fb,
		const struct drm_rect *rect);

void drm_fb_xrgb8888_to_mono(struct iosys_map *dst, const unsigned int *dst_pitch,
			     const struct iosys_map *src, const struct drm_framebuffer *fb,
			     const struct drm_rect *clip);

size_t drm_fb_build_fourcc_list(struct drm_device *dev,
				const u32 *native_fourccs, size_t native_nfourccs,
				u32 *fourccs_out, size_t nfourccs_out);

#endif /* __LINUX_DRM_FORMAT_HELPER_H */
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