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Message-Id: <20231009161028.it.544-kees@kernel.org> Date: Mon, 9 Oct 2023 09:10:35 -0700 From: Kees Cook <keescook@...omium.org> To: Christian Lamparter <chunkeey@...glemail.com> Cc: Kees Cook <keescook@...omium.org>, Kalle Valo <kvalo@...nel.org>, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-wireless@...r.kernel.org, linux-hardening@...r.kernel.org, Jason Andryuk <jandryuk@...il.com>, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org, llvm@...ts.linux.dev Subject: [PATCH v2] wifi: p54: Annotate struct p54_cal_database with __counted_by 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 via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). Add __counted_by for struct p54_cal_database. Cc: Christian Lamparter <chunkeey@...glemail.com> Cc: Kalle Valo <kvalo@...nel.org> Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org> Cc: linux-wireless@...r.kernel.org Cc: linux-hardening@...r.kernel.org Suggested-by: Jason Andryuk <jandryuk@...il.com> Signed-off-by: Kees Cook <keescook@...omium.org> --- v1 - https://lore.kernel.org/all/20231006201719.work.356-kees@kernel.org/ v2 - use the correct member (jandryuk) --- drivers/net/wireless/intersil/p54/p54.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/intersil/p54/p54.h b/drivers/net/wireless/intersil/p54/p54.h index 3356ea708d81..522656de4159 100644 --- a/drivers/net/wireless/intersil/p54/p54.h +++ b/drivers/net/wireless/intersil/p54/p54.h @@ -126,7 +126,7 @@ struct p54_cal_database { size_t entry_size; size_t offset; size_t len; - u8 data[]; + u8 data[] __counted_by(len); }; #define EEPROM_READBACK_LEN 0x3fc -- 2.34.1
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