From: Kees Cook Date: Fri, 15 Sep 2023 20:03:36 +0000 (-0700) Subject: dm raid: Annotate struct raid_set with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e3260d90c8f35c03ce182bfd2eeea75805586c25;p=linux.git dm raid: Annotate struct raid_set 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 raid_set. [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/20230915200335.never.098-kees@kernel.org Signed-off-by: Kees Cook --- diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 5f9991765f270..9755788e8b785 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -254,7 +254,7 @@ struct raid_set { int mode; } journal_dev; - struct raid_dev dev[]; + struct raid_dev dev[] __counted_by(raid_disks); }; static void rs_config_backup(struct raid_set *rs, struct rs_layout *l)