From f34907ecca71177a438bc1f1012e945326f707c3 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:52:45 -0700 Subject: [PATCH] mxser: Annotate struct mxser_board 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 mxser_board. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Jiri Slaby Cc: Greg Kroah-Hartman Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam Cc: NXP Linux Team Cc: linux-serial@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Kees Cook Reviewed-by: Jiri Slaby Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230922175245.work.196-kees@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/mxser.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 10aa4ed387937..6ce7f259968fa 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -288,7 +288,7 @@ struct mxser_board { enum mxser_must_hwid must_hwid; speed_t max_baud; - struct mxser_port ports[]; + struct mxser_port ports[] __counted_by(nports); }; static DECLARE_BITMAP(mxser_boards, MXSER_BOARDS);