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eeprom: at24: Annotate struct at24_data with __counted_by

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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 at24_data.

[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>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Kees Cook 2023-09-22 10:51:55 -07:00 committed by Bartosz Golaszewski
parent 4cdc5dbbc1
commit 997a29bbb1
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/eeprom/at24.c
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@ -92,7 +92,7 @@ struct at24_data {
* them for us.
*/
u8 bank_addr_shift;
struct regmap *client_regmaps[];
struct regmap *client_regmaps[] __counted_by(num_addresses);
};
/*