[patch 139/192] kasan: use dump_stack_lvl(KERN_ERR) to print stacks

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From: Alexander Potapenko <glider@xxxxxxxxxx>
Subject: kasan: use dump_stack_lvl(KERN_ERR) to print stacks

Most of the contents of KASAN reports are printed with pr_err(), so use a
consistent logging level to print the memory access stacks.

Link: https://lkml.kernel.org/r/20210506105405.3535023-2-glider@xxxxxxxxxx
Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Prasad Sodagudi <psodagud@xxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: he, bo <bo.he@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Yanmin Zhang <yanmin_zhang@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/kasan/report.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/mm/kasan/report.c~kasan-use-dump_stack_lvlkern_err-to-print-stacks
+++ a/mm/kasan/report.c
@@ -230,7 +230,7 @@ static void print_address_description(vo
 {
 	struct page *page = kasan_addr_to_page(addr);
 
-	dump_stack();
+	dump_stack_lvl(KERN_ERR);
 	pr_err("\n");
 
 	if (page && PageSlab(page)) {
@@ -375,7 +375,7 @@ void kasan_report_async(void)
 	pr_err("BUG: KASAN: invalid-access\n");
 	pr_err("Asynchronous mode enabled: no access details available\n");
 	pr_err("\n");
-	dump_stack();
+	dump_stack_lvl(KERN_ERR);
 	end_report(&flags, 0);
 }
 #endif /* CONFIG_KASAN_HW_TAGS */
@@ -420,7 +420,7 @@ static void __kasan_report(unsigned long
 		pr_err("\n");
 		print_memory_metadata(info.first_bad_addr);
 	} else {
-		dump_stack();
+		dump_stack_lvl(KERN_ERR);
 	}
 
 	end_report(&flags, addr);
_



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