From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) by kanga.kvack.org (Postfix) with ESMTP id 031A48E0001 for ; Fri, 28 Dec 2018 17:01:59 -0500 (EST) Received: by mail-pg1-f197.google.com with SMTP id q62so20764910pgq.9 for ; Fri, 28 Dec 2018 14:01:58 -0800 (PST) Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id az5sor4448858plb.11.2018.12.28.14.01.57 for (Google Transport Security); Fri, 28 Dec 2018 14:01:57 -0800 (PST) Date: Sat, 29 Dec 2018 01:01:52 +0300 From: "Kirill A. Shutemov" Subject: Re: KASAN: use-after-free Read in filemap_fault Message-ID: <20181228220152.wkeslziuovnunvwk@kshutemo-mobl1> References: <000000000000b57d19057e1b383d@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000b57d19057e1b383d@google.com> Sender: owner-linux-mm@kvack.org List-ID: To: syzbot Cc: akpm@linux-foundation.org, darrick.wong@oracle.com, hannes@cmpxchg.org, hughd@google.com, jack@suse.cz, josef@toxicpanda.com, jrdr.linux@gmail.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, willy@infradead.org On Fri, Dec 28, 2018 at 12:51:04PM -0800, syzbot wrote: > Allocated by task 8196: ... > Freed by task 8197: Hm. VMA allocated by one process (I don't see threads in the test case) gets freed by another one. Looks fishy to me. -- Kirill A. Shutemov