Messages in this thread | | | Date | Sat, 23 Sep 2023 10:38:00 -0600 | Subject | Re: [PATCH] mailbox: zynqmp: Annotate struct zynqmp_ipi_pdata with __counted_by | From | "Gustavo A. R. Silva" <> |
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On 9/22/23 11:53, 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 zynqmp_ipi_pdata. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Jassi Brar <jassisinghbrar@gmail.com> > Cc: Michal Simek <michal.simek@amd.com> > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Thanks -- Gustavo
> --- > drivers/mailbox/zynqmp-ipi-mailbox.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c > index e4fcac97dbfa..7fa533e80dd9 100644 > --- a/drivers/mailbox/zynqmp-ipi-mailbox.c > +++ b/drivers/mailbox/zynqmp-ipi-mailbox.c > @@ -108,7 +108,7 @@ struct zynqmp_ipi_pdata { > unsigned int method; > u32 local_id; > int num_mboxes; > - struct zynqmp_ipi_mbox ipi_mboxes[]; > + struct zynqmp_ipi_mbox ipi_mboxes[] __counted_by(num_mboxes); > }; > > static struct device_driver zynqmp_ipi_mbox_driver = {
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