lkml.org 
[lkml]   [2023]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mailbox: zynqmp: Annotate struct zynqmp_ipi_pdata with __counted_by
Date
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
\
 
 \ /
  Last update: 2023-09-22 20:06    [W:0.094 / U:1.692 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site