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 bios_args. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jorge Lopez <jorge.lopez2@xxxxxx> Cc: Hans de Goede <hdegoede@xxxxxxxxxx> Cc: Mark Gross <markgross@xxxxxxxxxx> Cc: Nathan Chancellor <nathan@xxxxxxxxxx> Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> Cc: Tom Rix <trix@xxxxxxxxxx> Cc: platform-driver-x86@xxxxxxxxxxxxxxx Cc: llvm@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c b/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c index dea54f35b8b5..4da99cb7218d 100644 --- a/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c +++ b/drivers/platform/x86/hp/hp-bioscfg/biosattr-interface.c @@ -19,7 +19,7 @@ struct bios_args { u32 command; u32 commandtype; u32 datasize; - u8 data[]; + u8 data[] __counted_by(datasize); }; /** -- 2.34.1
