Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] mailbox: zynqmp: Annotate struct zynqmp_ipi_pdata with __counted_by | Date | Fri, 22 Sep 2023 10:53:51 -0700 |
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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 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> --- 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 = { -- 2.34.1
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