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Message-Id: <20230922175207.work.576-kees@kernel.org>
Date: Fri, 22 Sep 2023 10:52:07 -0700
From: Kees Cook <keescook@...omium.org>
To: Support Opensource <support.opensource@...semi.com>
Cc: Kees Cook <keescook@...omium.org>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev, linux-hardening@...r.kernel.org
Subject: [PATCH] regulator: da9063: Annotate struct da9063_regulators 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 da9063_regulators.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Support Opensource <support.opensource@...semi.com>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
drivers/regulator/da9063-regulator.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c
index a0621665a6d2..82bf321ae06f 100644
--- a/drivers/regulator/da9063-regulator.c
+++ b/drivers/regulator/da9063-regulator.c
@@ -158,7 +158,7 @@ struct da9063_regulator {
struct da9063_regulators {
unsigned int n_regulators;
/* Array size to be defined during init. Keep at end. */
- struct da9063_regulator regulator[];
+ struct da9063_regulator regulator[] __counted_by(n_regulators);
};
/* BUCK modes for DA9063 */
--
2.34.1
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