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 rtllib_txb. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Philipp Hortmann <philipp.g.hortmann@xxxxxxxxx> Cc: linux-staging@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/staging/rtl8192e/rtllib.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/rtl8192e/rtllib.h b/drivers/staging/rtl8192e/rtllib.h index c5a692dfcd17..543d8671281d 100644 --- a/drivers/staging/rtl8192e/rtllib.h +++ b/drivers/staging/rtl8192e/rtllib.h @@ -818,7 +818,7 @@ struct rtllib_txb { u16 reserved; __le16 frag_size; __le16 payload_size; - struct sk_buff *fragments[]; + struct sk_buff *fragments[] __counted_by(nr_frags); }; #define MAX_SUBFRAME_COUNT 64 -- 2.34.1
