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Message-Id: <20230915200552.never.642-kees@kernel.org>
Date: Fri, 15 Sep 2023 13:05:52 -0700
From: Kees Cook <keescook@...omium.org>
To: Arend van Spriel <aspriel@...il.com>
Cc: Kees Cook <keescook@...omium.org>,
Franky Lin <franky.lin@...adcom.com>,
Hante Meuleman <hante.meuleman@...adcom.com>,
Kalle Valo <kvalo@...nel.org>,
Matthias Brugger <mbrugger@...e.com>,
Hector Martin <marcan@...can.st>,
Alvin Šipraga <alsi@...g-olufsen.dk>,
Hans de Goede <hdegoede@...hat.com>,
linux-wireless@...r.kernel.org,
brcm80211-dev-list.pdl@...adcom.com,
SHA-cyfmac-dev-list@...ineon.com,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Tom Rix <trix@...hat.com>,
"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
linux-hardening@...r.kernel.org
Subject: [PATCH] wifi: brcmfmac: firmware: Annotate struct brcmf_fw_request 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 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 brcmf_fw_request.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Arend van Spriel <aspriel@...il.com>
Cc: Franky Lin <franky.lin@...adcom.com>
Cc: Hante Meuleman <hante.meuleman@...adcom.com>
Cc: Kalle Valo <kvalo@...nel.org>
Cc: Matthias Brugger <mbrugger@...e.com>
Cc: Hector Martin <marcan@...can.st>
Cc: "Alvin Šipraga" <alsi@...g-olufsen.dk>
Cc: Hans de Goede <hdegoede@...hat.com>
Cc: linux-wireless@...r.kernel.org
Cc: brcm80211-dev-list.pdl@...adcom.com
Cc: SHA-cyfmac-dev-list@...ineon.com
Signed-off-by: Kees Cook <keescook@...omium.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
index 1266cbaee072..4002d326fd21 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
@@ -69,7 +69,7 @@ struct brcmf_fw_request {
u16 bus_nr;
u32 n_items;
const char *board_types[BRCMF_FW_MAX_BOARD_TYPES];
- struct brcmf_fw_item items[];
+ struct brcmf_fw_item items[] __counted_by(n_items);
};
struct brcmf_fw_name {
--
2.34.1
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