From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECC43C2D0EF for ; Fri, 27 Mar 2020 01:30:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B62D420787 for ; Fri, 27 Mar 2020 01:30:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727826AbgC0B2F (ORCPT ); Thu, 26 Mar 2020 21:28:05 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:51172 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727560AbgC0B2E (ORCPT ); Thu, 26 Mar 2020 21:28:04 -0400 Received: by mail-io1-f69.google.com with SMTP id s2so7067358iot.17 for ; Thu, 26 Mar 2020 18:28:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=fpOoO95ghuCLLCEIiKHNf1Vn4Rzo9M55/w0gJcRUpiM=; b=LbhPRqVa/W5TYtBTr3FZvvIXEhYLI1uA660HUfr/OPSRU1ELxUbEILOXhsnn2C5YCr PFojmyBJZ6RZlwxXZgAl+yCQ/wxIImPlM55TIR9/q/J5SCR+abNPBNA4zah6yZmikE5D jUOXtMBWEbPvmRx04OQq8C2m0DsQqSuKCcv7roZznXYtEtFr+VbYik1KevMWgRALlwdu s6ZGWTCh6/hcZS7FpeeK6Yr9SunxAsq48+wx3nGubZ19fmplgI9wFUx7l6sGME72rLXz gEhmtWrfUDJWafkg+08lLGWtkWcS1uMhhAYvRluZJHmkBRBghmQUqoWUvveLemoAGn9i dKpA== X-Gm-Message-State: ANhLgQ3dtppatSkZ44Yvtx7EmUkfK5zkoX+/9oKwHySPPFfkpyjAZwb+ T18l52AFVVc4XWH7r9YiA9qDYmhS6MVS4e9xmFTzHvSA5mfy X-Google-Smtp-Source: ADFU+vvuj9CdqnaKA39zoipe43VtYnqnycnu6XYDRVQ3pQdtkCj1GJ/YWcoFF34sHC9pd58juZJvz3MqwN724aP7IdgdRuetL7J1 MIME-Version: 1.0 X-Received: by 2002:a92:9107:: with SMTP id t7mr11623063ild.140.1585272483961; Thu, 26 Mar 2020 18:28:03 -0700 (PDT) Date: Thu, 26 Mar 2020 18:28:03 -0700 In-Reply-To: <00000000000047770d05a1c70ecb@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004760b805a1cc03fc@google.com> Subject: Re: KASAN: null-ptr-deref Write in blk_mq_map_swqueue From: syzbot To: a@unstable.cc, axboe@kernel.dk, b.a.t.m.a.n@lists.open-mesh.org, davem@davemloft.net, dongli.zhang@oracle.com, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sven@narfation.org, sw@simonwunderlich.de, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit 768134d4f48109b90f4248feecbeeb7d684e410c Author: Jens Axboe Date: Mon Nov 11 03:30:53 2019 +0000 io_uring: don't do flush cancel under inflight_lock bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14233ef5e00000 start commit: 1b649e0b Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=16233ef5e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=12233ef5e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=27392dd2975fd692 dashboard link: https://syzkaller.appspot.com/bug?extid=313d95e8a7a49263f88d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13850447e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=119a26f5e00000 Reported-by: syzbot+313d95e8a7a49263f88d@syzkaller.appspotmail.com Fixes: 768134d4f481 ("io_uring: don't do flush cancel under inflight_lock") For information about bisection process see: https://goo.gl/tpsmEJ#bisection