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| author | Kees Cook <keescook@chromium.org> | 2023-09-22 20:32:11 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2023-10-05 12:30:50 +0300 |
| commit | b16cc13baca7381737e2656c0095f787328a44b4 (patch) | |
| tree | bd4978c5ee6696b9a187ecca97611612fd4ebcb0 | |
| parent | 9760e50db54f3a858e67703f74f99e65784fd873 (diff) | |
| download | linux-b16cc13baca7381737e2656c0095f787328a44b4.tar.xz | |
drm/vc4: Annotate struct vc4_perfmon 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 vc4_perfmon.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Emma Anholt <emma@anholt.net>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230922173216.3823169-6-keescook@chromium.org
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_drv.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index bf66499765fb..ab61e96e7e14 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -76,7 +76,7 @@ struct vc4_perfmon { * Note that counter values can't be reset, but you can fake a reset by * destroying the perfmon and creating a new one. */ - u64 counters[]; + u64 counters[] __counted_by(ncounters); }; struct vc4_dev { |