| Message ID | 20230922175358.work.774-kees@kernel.org (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | power: supply: axp20x_usb_power: Annotate struct axp20x_usb_power with __counted_by | expand |
On Fri, 22 Sep 2023 10:53:58 -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 axp20x_usb_power. > > [...] Applied, thanks! [1/1] power: supply: axp20x_usb_power: Annotate struct axp20x_usb_power with __counted_by commit: de1ca06bc0364a58ba0889d97a7a094d87dd5477 Best regards,
On Fri, Sep 22, 2023 at 10:53:58AM -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 axp20x_usb_power. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Sebastian Reichel <sre@kernel.org> > Cc: Chen-Yu Tsai <wens@csie.org> > Cc: linux-pm@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks -- Gustavo > --- > drivers/power/supply/axp20x_usb_power.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c > index bde17406c130..e23308ad4cc7 100644 > --- a/drivers/power/supply/axp20x_usb_power.c > +++ b/drivers/power/supply/axp20x_usb_power.c > @@ -73,7 +73,7 @@ struct axp20x_usb_power { > unsigned int old_status; > unsigned int online; > unsigned int num_irqs; > - unsigned int irqs[]; > + unsigned int irqs[] __counted_by(num_irqs); > }; > > static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power) > -- > 2.34.1 > >
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c index bde17406c130..e23308ad4cc7 100644 --- a/drivers/power/supply/axp20x_usb_power.c +++ b/drivers/power/supply/axp20x_usb_power.c @@ -73,7 +73,7 @@ struct axp20x_usb_power { unsigned int old_status; unsigned int online; unsigned int num_irqs; - unsigned int irqs[]; + unsigned int irqs[] __counted_by(num_irqs); }; static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power)
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 axp20x_usb_power. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Sebastian Reichel <sre@kernel.org> Cc: Chen-Yu Tsai <wens@csie.org> Cc: linux-pm@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/power/supply/axp20x_usb_power.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)