[PATCH v4 3/6] kasan: print timer and workqueue stack

[Walter Wu]

The aux_stack[2] is reused to record the call_rcu() call stack,
timer init call stack, and enqueuing work call stacks. So that
we need to change the auxiliary stack title for common title,
print them in KASAN report.

Signed-off-by: Walter Wu <walter-zh...@mediatek.com>
Suggested-by: Marco Elver <el...@google.com>
Acked-by: Marco Elver <el...@google.com>
Reviewed-by: Dmitry Vyukov <dvyu...@google.com>
Reviewed-by: Andrey Konovalov <andreyk...@google.com>
Cc: Andrey Ryabinin <aryabi...@virtuozzo.com>
Cc: Alexander Potapenko <gli...@google.com>
---

v2:
- Thanks for Marco suggestion.
- We modify aux stack title name in KASAN report
  in order to print call_rcu()/timer/workqueue stack.

---
 mm/kasan/report.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 4f49fa6cd1aa..886809d0a8dd 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -183,12 +183,12 @@ static void describe_object(struct kmem_cache *cache, 
void *object,
 
 #ifdef CONFIG_KASAN_GENERIC
                if (alloc_info->aux_stack[0]) {
-                       pr_err("Last call_rcu():\n");
+                       pr_err("Last potentially related work creation:\n");
                        print_stack(alloc_info->aux_stack[0]);
                        pr_err("\n");
                }
                if (alloc_info->aux_stack[1]) {
-                       pr_err("Second to last call_rcu():\n");
+                       pr_err("Second to last potentially related work 
creation:\n");
                        print_stack(alloc_info->aux_stack[1]);
                        pr_err("\n");
                }
-- 
2.18.0