Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] wifi: p54: Annotate struct p54_cal_database with __counted_by | Date | Fri, 6 Oct 2023 13:17:20 -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 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 p54_cal_database.
Cc: Christian Lamparter <chunkeey@googlemail.com> Cc: Kalle Valo <kvalo@kernel.org> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: linux-wireless@vger.kernel.org Cc: linux-hardening@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@chromium.org> --- 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..770e348d1f6c 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(entries); }; #define EEPROM_READBACK_LEN 0x3fc -- 2.34.1
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