Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] PCI: hv: Annotate struct hv_dr_state with __counted_by | Date | Fri, 22 Sep 2023 10:52:57 -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 hv_dr_state.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Wei Liu <wei.liu@kernel.org> Cc: Dexuan Cui <decui@microsoft.com> Cc: Lorenzo Pieralisi <lpieralisi@kernel.org> Cc: "Krzysztof Wilczyński" <kw@linux.com> Cc: Rob Herring <robh@kernel.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: linux-hyperv@vger.kernel.org Cc: linux-pci@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/pci/controller/pci-hyperv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index bed3cefdaf19..30c7dfeccb16 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -545,7 +545,7 @@ struct hv_pcidev_description { struct hv_dr_state { struct list_head list_entry; u32 device_count; - struct hv_pcidev_description func[]; + struct hv_pcidev_description func[] __counted_by(device_count); }; struct hv_pci_dev { -- 2.34.1
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