From 751d377f0f7a09d6122de0e2232133524568c52b Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:50:19 -0700 Subject: i3c/master/mipi-i3c-hci: Annotate struct hci_rings_data with __counted_by 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 hci_rings_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Alexandre Belloni Cc: Nicolas Pitre Cc: Len Baker Cc: Boris Brezillon Cc: linux-i3c@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230922175019.work.129-kees@kernel.org Signed-off-by: Alexandre Belloni --- drivers/i3c/master/mipi-i3c-hci/dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/i3c') diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c index 2990ac9eaade..a1ecdfc35641 100644 --- a/drivers/i3c/master/mipi-i3c-hci/dma.c +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c @@ -139,7 +139,7 @@ struct hci_rh_data { struct hci_rings_data { unsigned int total; - struct hci_rh_data headers[]; + struct hci_rh_data headers[] __counted_by(total); }; struct hci_dma_dev_ibi_data { -- cgit v1.2.3