linux-kernel - [PATCH v4 7/9] kasan: print page description after stacks

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Date:   Fri, 24 Mar 2017 20:32:33 +0100
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH v4 7/9] kasan: print page description after stacks

Moves page description after the stacks since it's less important.

Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
---
 mm/kasan/report.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 06e27a342d1d..e0f7dbf9e883 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -242,9 +242,6 @@ static void print_address_description(struct kasan_access_info *info)
 	void *addr = (void *)info->access_addr;
 	struct page *page = addr_to_page(addr);
 
-	if (page)
-		dump_page(page, "kasan: bad access detected");
-
 	dump_stack();
 
 	if (page && PageSlab(page)) {
@@ -254,9 +251,14 @@ static void print_address_description(struct kasan_access_info *info)
 		describe_object(cache, object, addr);
 	}
 
-	if (kernel_or_module_addr(addr)) {
-		if (!init_task_stack_addr(addr))
-			pr_err("Address belongs to variable %pS\n", addr);
+	if (kernel_or_module_addr(addr) && !init_task_stack_addr(addr)) {
+		pr_err("The buggy address belongs to the variable:\n");
+		pr_err(" %pS\n", addr);
+	}
+
+	if (page) {
+		pr_err("The buggy address belongs to the page:\n");
+		dump_page(page, "kasan: bad access detected");
 	}
 }
 
-- 
2.12.1.578.ge9c3154ca4-goog