From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C726A1FB7 for ; Fri, 25 Mar 2022 01:12:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 932C7C340EC; Fri, 25 Mar 2022 01:12:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648170743; bh=vnAUd7nf5uyUi8olJddwm57pCYbDS8/7np9LcQEPrxc=; h=Date:To:From:In-Reply-To:Subject:From; b=Ct9Ii/FiAGzRWUkNzl9KtFFlzOhvNnguTYRuFUtalu96XtrhXmvXRXgYntfiK0b9q I+nDT/mQLn4PQHSYGMaOe+8BQfMw6tQmgx1yaw0eteGaeHEGWCdPG3k4dicXgN/DkR uPZIFCnjEglz0zAowOp1VhOzc+ereSJmEA1M+Ms8= Date: Thu, 24 Mar 2022 18:12:23 -0700 To: ryabinin.a.a@gmail.com,glider@google.com,elver@google.com,dvyukov@google.com,andreyknvl@google.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220324180758.96b1ac7e17675d6bc474485e@linux-foundation.org> Subject: [patch 076/114] kasan: improve stack frame info in reports Message-Id: <20220325011223.932C7C340EC@smtp.kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: From: Andrey Konovalov Subject: kasan: improve stack frame info in reports - Print at least task name and id for reports affecting allocas (get_address_stack_frame_info() does not support them). - Capitalize first letter of each sentence. Link: https://lkml.kernel.org/r/aa613f097c12f7b75efb17f2618ae00480fb4bc3.1646237226.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Marco Elver Signed-off-by: Andrew Morton --- mm/kasan/report_generic.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/mm/kasan/report_generic.c~kasan-improve-stack-frame-info-in-reports +++ a/mm/kasan/report_generic.c @@ -180,7 +180,7 @@ static void print_decoded_frame_descr(co return; pr_err("\n"); - pr_err("this frame has %lu %s:\n", num_objects, + pr_err("This frame has %lu %s:\n", num_objects, num_objects == 1 ? "object" : "objects"); while (num_objects--) { @@ -266,13 +266,14 @@ void kasan_print_address_stack_frame(con if (WARN_ON(!object_is_on_stack(addr))) return; + pr_err("The buggy address belongs to stack of task %s/%d\n", + current->comm, task_pid_nr(current)); + if (!get_address_stack_frame_info(addr, &offset, &frame_descr, &frame_pc)) return; - pr_err("\n"); - pr_err("addr %px is located in stack of task %s/%d at offset %lu in frame:\n", - addr, current->comm, task_pid_nr(current), offset); + pr_err(" and is located at offset %lu in frame:\n", offset); pr_err(" %pS\n", frame_pc); if (!frame_descr) _