Skip to content

Commit

Permalink
leds: mt6360: Annotate struct mt6360_priv with __counted_by
Browse files Browse the repository at this point in the history
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 mt6360_priv.

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

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230915201020.never.433-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
  • Loading branch information
Kees Cook authored and Lee Jones committed Nov 1, 2023
1 parent 6061302 commit 476301c
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion drivers/leds/flash/leds-mt6360.c
Original file line number Diff line number Diff line change
Expand Up @@ -91,7 +91,7 @@ struct mt6360_priv {
unsigned int fled_torch_used;
unsigned int leds_active;
unsigned int leds_count;
struct mt6360_led leds[];
struct mt6360_led leds[] __counted_by(leds_count);
};

static int mt6360_mc_brightness_set(struct led_classdev *lcdev,
Expand Down

0 comments on commit 476301c

Please sign in to comment.