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staging: rtl8192e: Annotate struct rtllib_txb with __counted_by

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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>
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20230817204523.never.034-kees@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2023-08-17 13:45:24 -07:00 committed by Greg Kroah-Hartman
parent f6f0d97b2c
commit aee17df05e
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rtl8192e/rtllib.h
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@ -814,7 +814,7 @@ 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