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 ata_cpr_log. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Damien Le Moal <[email protected]> Cc: [email protected] Signed-off-by: Kees Cook <[email protected]> --- include/linux/libata.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/libata.h b/include/linux/libata.h index 3c17a5053f00..f91e8e7f1c00 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -656,7 +656,7 @@ struct ata_cpr { struct ata_cpr_log { u8 nr_cpr; - struct ata_cpr cpr[]; + struct ata_cpr cpr[] __counted_by(nr_cpr); }; struct ata_device { -- 2.34.1
