On Fri, Sep 22, 2023 at 10:54:25AM -0700, Kees Cook wrote: > 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@xxxxxxxxxx> > Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx> > Cc: Luca Ceresoli <luca.ceresoli@xxxxxxxxxxx> > Cc: Nathan Chancellor <nathan@xxxxxxxxxx> > Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > Cc: Tom Rix <trix@xxxxxxxxxx> > Cc: linux-i2c@xxxxxxxxxxxxxxx > Cc: llvm@xxxxxxxxxxxxxxx > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Reviewed-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> Thanks -- Gustavo > --- > 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 > >
