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 0CC7B1FB7 for ; Fri, 25 Mar 2022 01:12:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC81EC340EE; Fri, 25 Mar 2022 01:12:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648170731; bh=RPS66mLY40uI7CEhGYfZFqqxIgB4RPI/gfzwyJYAVB8=; h=Date:To:From:In-Reply-To:Subject:From; b=VzuZPvGwr82PnQ7KgUnkbt/5DAtiej7C3uoqr5NCSS70ylCvW4Psv0DAR9s/2I1m3 oqqYyserZmuq27LctMKTO4X5I8aRrHZozobQ74LcsvUcy2FXwP3QYsqhnbiIT5eb2V I+6JXukwRq3x8mKN/9AHwWK9kWnopKLNTxeF6oaI= Date: Thu, 24 Mar 2022 18:12:11 -0700 To: ryabinin.a.a@gmail.com,mark.rutland@arm.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 072/114] kasan: print virtual mapping info in reports Message-Id: <20220325011211.CC81EC340EE@smtp.kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: From: Andrey Konovalov Subject: kasan: print virtual mapping info in reports Print virtual mapping range and its creator in reports affecting virtual mappings. Also get physical page pointer for such mappings, so page information gets printed as well. Link: https://lkml.kernel.org/r/6ebb11210ae21253198e264d4bb0752c1fad67d7.1645548178.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Mark Rutland Cc: Marco Elver Cc: Alexander Potapenko Cc: Dmitriy Vyukov Cc: Andrey Ryabinin Signed-off-by: Andrew Morton --- mm/kasan/report.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) --- a/mm/kasan/report.c~kasan-print-virtual-mapping-info-in-reports +++ a/mm/kasan/report.c @@ -260,8 +260,21 @@ static void print_address_description(vo pr_err(" %pS\n", addr); } + if (is_vmalloc_addr(addr)) { + struct vm_struct *va = find_vm_area(addr); + + if (va) { + pr_err("The buggy address belongs to the virtual mapping at\n" + " [%px, %px) created by:\n" + " %pS\n", + va->addr, va->addr + va->size, va->caller); + + page = vmalloc_to_page(page); + } + } + if (page) { - pr_err("The buggy address belongs to the page:\n"); + pr_err("The buggy address belongs to the physical page:\n"); dump_page(page, "kasan: bad access detected"); } _