From 45492b13453f9862abff6f9d7af5e8116849a9c9 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:52:50 -0700 Subject: [PATCH] memstick: jmb38x_ms: Annotate struct jmb38x_ms 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 jmb38x_ms. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Maxim Levitsky Cc: Alex Dubov Cc: Ulf Hansson Cc: Tom Rix Cc: Len Baker Cc: Dan Carpenter Cc: "Gustavo A. R. Silva" Cc: linux-mmc@vger.kernel.org Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20230922175249.work.593-kees@kernel.org Signed-off-by: Ulf Hansson --- drivers/memstick/host/jmb38x_ms.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c index 21cb2a786058..e77eb8b0eb12 100644 --- a/drivers/memstick/host/jmb38x_ms.c +++ b/drivers/memstick/host/jmb38x_ms.c @@ -66,7 +66,7 @@ struct jmb38x_ms_host { struct jmb38x_ms { struct pci_dev *pdev; int host_cnt; - struct memstick_host *hosts[]; + struct memstick_host *hosts[] __counted_by(host_cnt); }; #define BLOCK_COUNT_MASK 0xffff0000