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-rw-r--r--mm/kasan/report.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 5835d69563f5..fab8e7882ff1 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -54,6 +54,9 @@ static void print_error_description(struct kasan_access_info *info)
shadow_val = *(u8 *)kasan_mem_to_shadow(info->first_bad_addr);
switch (shadow_val) {
+ case KASAN_FREE_PAGE:
+ bug_type = "use after free";
+ break;
case 0 ... KASAN_SHADOW_SCALE_SIZE - 1:
bug_type = "out of bounds access";
break;
@@ -69,6 +72,14 @@ static void print_error_description(struct kasan_access_info *info)
static void print_address_description(struct kasan_access_info *info)
{
+ const void *addr = info->access_addr;
+
+ if ((addr >= (void *)PAGE_OFFSET) &&
+ (addr < high_memory)) {
+ struct page *page = virt_to_head_page(addr);
+ dump_page(page, "kasan: bad access detected");
+ }
+
dump_stack();
}