On 9/22/23 11:28, 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 mana_rxq.
[1]
https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: "K. Y. Srinivasan" <k...@microsoft.com>
Cc: Haiyang Zhang <haiya...@microsoft.com>
Cc: Wei Liu <wei....@kernel.org>
Cc: Dexuan Cui <de...@microsoft.com>
Cc: Long Li <lon...@microsoft.com>
Cc: Ajay Sharma <sharmaa...@microsoft.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Eric Dumazet <eduma...@google.com>
Cc: Jakub Kicinski <k...@kernel.org>
Cc: Paolo Abeni <pab...@redhat.com>
Cc: linux-hyp...@vger.kernel.org
Cc: linux-r...@vger.kernel.org
Cc: net...@vger.kernel.org
Signed-off-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavo...@kernel.org>
Thanks
--
Gustavo
---
include/net/mana/mana.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h
index 9f70b4332238..38441be68592 100644
--- a/include/net/mana/mana.h
+++ b/include/net/mana/mana.h
@@ -338,7 +338,7 @@ struct mana_rxq {
/* MUST BE THE LAST MEMBER:
* Each receive buffer has an associated mana_recv_buf_oob.
*/
- struct mana_recv_buf_oob rx_oobs[];
+ struct mana_recv_buf_oob rx_oobs[] __counted_by(num_rx_buf);
};
struct mana_tx_qp {
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