From: Kees Cook <keescook@chromium.org>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
linux-hardening@vger.kernel.org
Subject: [PATCH] hpet: Annotate struct hpets with __counted_by
Date: Fri, 22 Sep 2023 10:53:48 -0700 [thread overview]
Message-ID: <20230922175348.work.056-kees@kernel.org> (raw)
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 hpets.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Clemens Ladisch <clemens@ladisch.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/char/hpet.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 3b2159416e62..807c389510de 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -92,7 +92,7 @@ struct hpets {
unsigned long hp_delta;
unsigned int hp_ntimer;
unsigned int hp_which;
- struct hpet_dev hp_dev[];
+ struct hpet_dev hp_dev[] __counted_by(hp_ntimer);
};
static struct hpets *hpets;
--
2.34.1
next reply other threads:[~2023-09-22 18:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 17:53 Kees Cook [this message]
2023-09-23 16:37 ` [PATCH] hpet: Annotate struct hpets with __counted_by Gustavo A. R. Silva
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