Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] staging: rtl8192e: Annotate struct rtllib_txb with __counted_by | Date | Thu, 17 Aug 2023 13:45:24 -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 rtllib_txb.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Philipp Hortmann <philipp.g.hortmann@gmail.com> Cc: linux-staging@lists.linux.dev Signed-off-by: Kees Cook <keescook@chromium.org> --- 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
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