From: Kees Cook Date: Fri, 22 Sep 2023 17:54:25 +0000 (-0700) Subject: i2c: Annotate struct i2c_atr with __counted_by X-Git-Tag: v6.7-rc1~56^2~28 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a133a4e44554bb7af114f231db2f30f447417cc;p=thirdparty%2Fkernel%2Fstable.git i2c: Annotate struct i2c_atr 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 i2c_atr. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/i2c-atr.c b/drivers/i2c/i2c-atr.c index 8ca1daadec937..f21475ae59218 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 *