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| author | Kees Cook <keescook@chromium.org> | 2023-09-22 10:54:37 -0700 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2023-09-26 16:01:07 +0300 |
| commit | 9cf63f3a33e929f7eca36409914b8c12102b9984 (patch) | |
| tree | fdcc2a2f1802666dd9ea836f83fc6c4f6b1603a3 | |
| parent | 55ec81f7517fad09135f65552cea0a3ee84fff30 (diff) | |
| download | lwn-9cf63f3a33e929f7eca36409914b8c12102b9984.tar.gz lwn-9cf63f3a33e929f7eca36409914b8c12102b9984.zip | |
platform/surface: aggregator: Annotate struct ssam_event 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 ssam_event.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Maximilian Luz <luzmaximilian@gmail.com>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Link: https://lore.kernel.org/r/20230922175436.work.031-kees@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
| -rw-r--r-- | include/linux/surface_aggregator/controller.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/surface_aggregator/controller.h b/include/linux/surface_aggregator/controller.h index cb7980805920..5b67f0f47d80 100644 --- a/include/linux/surface_aggregator/controller.h +++ b/include/linux/surface_aggregator/controller.h @@ -44,7 +44,7 @@ struct ssam_event { u8 command_id; u8 instance_id; u16 length; - u8 data[]; + u8 data[] __counted_by(length); }; /** |