Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] media: i2c: Annotate struct i2c_atr with __counted_by | Date | Fri, 22 Sep 2023 10:54:25 -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 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 i2c_atr.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Wolfram Sang <wsa@kernel.org> Cc: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Cc: Luca Ceresoli <luca.ceresoli@bootlin.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Tom Rix <trix@redhat.com> Cc: linux-i2c@vger.kernel.org Cc: llvm@lists.linux.dev Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/i2c/i2c-atr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c index 8ca1daadec93..f21475ae5921 100644 --- a/drivers/i2c/i2c-atr.c +++ b/drivers/i2c/i2c-atr.c @@ -94,7 +94,7 @@ struct i2c_atr { struct notifier_block i2c_nb; - struct i2c_adapter *adapter[]; + struct i2c_adapter *adapter[] __counted_by(max_adapters); }; static struct i2c_atr_alias_pair * -- 2.34.1
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