From: Kees Cook Date: Fri, 15 Sep 2023 20:03:53 +0000 (-0700) Subject: dm: Annotate struct stripe_c with __counted_by X-Git-Tag: v6.7-rc1~171^2~22 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=694b3b9d7acf771c4289babbe0f810556625b6b3;p=thirdparty%2Fkernel%2Flinux.git dm: Annotate struct stripe_c 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 stripe_c. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Alasdair Kergon Cc: Mike Snitzer Cc: dm-devel@redhat.com Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230915200352.never.118-kees@kernel.org Signed-off-by: Kees Cook --- diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index e2854a3cbd282..5e70f5ae394d0 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -44,7 +44,7 @@ struct stripe_c { /* Work struct used for triggering events*/ struct work_struct trigger_event; - struct stripe stripe[]; + struct stripe stripe[] __counted_by(stripes); }; /*