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i2c: Annotate struct i2c_atr with __counted_by

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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

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:54:25 -07:00 committed by Wolfram Sang
parent 86f8a1ef96
commit 3a133a4e44
1 changed files with 1 additions and 1 deletions
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drivers/i2c/i2c-atr.c
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@ -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 *