| Message ID | 20200522020151.23405-1-walter-zh.wu@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kasan: memorize and print call_rcu stack | expand |
On Fri, May 22, 2020 at 4:02 AM Walter Wu <walter-zh.wu@mediatek.com> wrote: > > Test call_rcu() call stack recording and verify whether it correctly > is printed in KASAN report. Reviewed-and-tested-by: Dmitry Vyukov <dvyukov@google.com> > Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> > Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> > Cc: Dmitry Vyukov <dvyukov@google.com> > Cc: Alexander Potapenko <glider@google.com> > Cc: Matthias Brugger <matthias.bgg@gmail.com> > --- > lib/test_kasan.c | 30 ++++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/lib/test_kasan.c b/lib/test_kasan.c > index e3087d90e00d..6e5fb05d42d8 100644 > --- a/lib/test_kasan.c > +++ b/lib/test_kasan.c > @@ -792,6 +792,35 @@ static noinline void __init vmalloc_oob(void) > static void __init vmalloc_oob(void) {} > #endif > > +static struct kasan_rcu_info { > + int i; > + struct rcu_head rcu; > +} *global_ptr; > + > +static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp) > +{ > + struct kasan_rcu_info *fp = container_of(rp, > + struct kasan_rcu_info, rcu); > + > + kfree(fp); > + fp->i = 1; > +} > + > +static noinline void __init kasan_rcu_uaf(void) > +{ > + struct kasan_rcu_info *ptr; > + > + pr_info("use-after-free in kasan_rcu_reclaim\n"); > + ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL); > + if (!ptr) { > + pr_err("Allocation failed\n"); > + return; > + } > + > + global_ptr = rcu_dereference_protected(ptr, NULL); > + call_rcu(&global_ptr->rcu, kasan_rcu_reclaim); > +} > + > static int __init kmalloc_tests_init(void) > { > /* > @@ -839,6 +868,7 @@ static int __init kmalloc_tests_init(void) > kasan_bitops(); > kmalloc_double_kzfree(); > vmalloc_oob(); > + kasan_rcu_uaf(); > > kasan_restore_multi_shot(multishot); > > -- > 2.18.0 > > -- > You received this message because you are subscribed to the Google Groups "kasan-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an email to kasan-dev+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/kasan-dev/20200522020151.23405-1-walter-zh.wu%40mediatek.com.
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3087d90e00d..6e5fb05d42d8 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -792,6 +792,35 @@ static noinline void __init vmalloc_oob(void) static void __init vmalloc_oob(void) {} #endif +static struct kasan_rcu_info { + int i; + struct rcu_head rcu; +} *global_ptr; + +static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp) +{ + struct kasan_rcu_info *fp = container_of(rp, + struct kasan_rcu_info, rcu); + + kfree(fp); + fp->i = 1; +} + +static noinline void __init kasan_rcu_uaf(void) +{ + struct kasan_rcu_info *ptr; + + pr_info("use-after-free in kasan_rcu_reclaim\n"); + ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + global_ptr = rcu_dereference_protected(ptr, NULL); + call_rcu(&global_ptr->rcu, kasan_rcu_reclaim); +} + static int __init kmalloc_tests_init(void) { /* @@ -839,6 +868,7 @@ static int __init kmalloc_tests_init(void) kasan_bitops(); kmalloc_double_kzfree(); vmalloc_oob(); + kasan_rcu_uaf(); kasan_restore_multi_shot(multishot);
Test call_rcu() call stack recording and verify whether it correctly is printed in KASAN report. Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> --- lib/test_kasan.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)