From: Kees Cook <keescook@chromium.org>
To: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: "Kees Cook" <keescook@chromium.org>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Wei Liu" <wei.liu@kernel.org>,
"Dexuan Cui" <decui@microsoft.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Rob Herring" <robh@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
"Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Tom Rix" <trix@redhat.com>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
linux-hardening@vger.kernel.org
Subject: [PATCH] PCI: hv: Annotate struct hv_dr_state with __counted_by
Date: Fri, 22 Sep 2023 10:52:57 -0700 [thread overview]
Message-ID: <20230922175257.work.900-kees@kernel.org> (raw)
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
next reply other threads:[~2023-09-22 17:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-22 17:52 Kees Cook [this message]
2023-09-22 18:42 ` [PATCH] PCI: hv: Annotate struct hv_dr_state with __counted_by Wei Liu
2023-09-23 17:00 ` Gustavo A. R. Silva
2023-10-14 19:42 ` Krzysztof Wilczyński
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