On Tue, Jan 5, 2021 at 7:28 PM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > Add 3 new tests for tag-based KASAN modes: > > 1. Check that match-all pointer tag is not assigned randomly. > 2. Check that 0xff works as a match-all pointer tag. > 3. Check that there are no match-all memory tags. > > Note, that test #3 causes a significant number (255) of KASAN reports > to be printed during execution for the SW_TAGS mode. > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > Link: https://linux-review.googlesource.com/id/I78f1375efafa162b37f3abcb2c5bc2f3955dfd8e > --- > lib/test_kasan.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++ > mm/kasan/kasan.h | 6 ++++ > 2 files changed, 99 insertions(+) > > diff --git a/lib/test_kasan.c b/lib/test_kasan.c > index 46e578c8e842..f1eda0bcc780 100644 > --- a/lib/test_kasan.c > +++ b/lib/test_kasan.c > @@ -13,6 +13,7 @@ > #include <linux/mman.h> > #include <linux/module.h> > #include <linux/printk.h> > +#include <linux/random.h> > #include <linux/slab.h> > #include <linux/string.h> > #include <linux/uaccess.h> > @@ -790,6 +791,95 @@ static void vmalloc_oob(struct kunit *test) > vfree(area); > } > > +/* > + * Check that match-all pointer tag is not assigned randomly for > + * tag-based modes. > + */ > +static void match_all_not_assigned(struct kunit *test) > +{ Do we want to run this test in non-tag-based modes? Probably not?
