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 <maximlevitsky@xxxxxxxxx> Cc: Alex Dubov <oakad@xxxxxxxxx> Cc: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Cc: Tom Rix <trix@xxxxxxxxxx> Cc: Len Baker <len.baker@xxxxxxx> Cc: Dan Carpenter <error27@xxxxxxxxx> Cc: "Gustavo A. R. Silva" <gustavoars@xxxxxxxxxx> Cc: linux-mmc@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- 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 -- 2.34.1
