On 9/22/23 11:50, 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 cdns_i3c_xfer.
[1]
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: "Przemysław Gaj" <[email protected]>
Cc: Alexandre Belloni <[email protected]>
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Thanks
--
Gustavo
---
drivers/i3c/master/i3c-master-cdns.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i3c/master/i3c-master-cdns.c
b/drivers/i3c/master/i3c-master-cdns.c
index 49551db71bc9..97c1010956a0 100644
--- a/drivers/i3c/master/i3c-master-cdns.c
+++ b/drivers/i3c/master/i3c-master-cdns.c
@@ -387,7 +387,7 @@ struct cdns_i3c_xfer {
struct completion comp;
int ret;
unsigned int ncmds;
- struct cdns_i3c_cmd cmds[];
+ struct cdns_i3c_cmd cmds[] __counted_by(ncmds);
};
struct cdns_i3c_data {
