Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] eeprom: at24: Annotate struct at24_data with __counted_by | Date | Fri, 22 Sep 2023 10:51:55 -0700 |
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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
Cc: Bartosz Golaszewski <brgl@bgdev.pl> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-i2c@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/misc/eeprom/at24.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index af83aca452b7..7dfd7fdb423e 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -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); }; /* -- 2.34.1
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