Input: ims-pcu - annotate struct ims_pcu_flash_fmt with __counted_by

Use the __counted_by compiler attribute for the data[] flexible array
member to improve the results of array bound sanitizers.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20240619-ims-pcu-counted_by-v1-1-3ee0ead2e57d@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/misc/ims-pcu.c b/drivers/input/misc/ims-pcu.c
index 408a586f8c360c845d7572ab32ae27ddd91b81e4..91f8ad8262383680c2d5d3581d06579e8336bac1 100644 (file)
--- a/drivers/input/misc/ims-pcu.c
+++ b/drivers/input/misc/ims-pcu.c
@@ -761,7 +761,7 @@ static int ims_pcu_switch_to_bootloader(struct ims_pcu *pcu)
 struct ims_pcu_flash_fmt {
        __le32 addr;
        u8 len;
-       u8 data[];
+       u8 data[] __counted_by(len);
 };
 
 static unsigned int ims_pcu_count_fw_records(const struct firmware *fw)