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); _
