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 autolearn=ham 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 8DAD6C47404 for ; Mon, 7 Oct 2019 19:39:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6494C206C0 for ; Mon, 7 Oct 2019 19:39:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729169AbfJGTjI (ORCPT ); Mon, 7 Oct 2019 15:39:08 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:50904 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728330AbfJGTjI (ORCPT ); Mon, 7 Oct 2019 15:39:08 -0400 Received: by mail-io1-f70.google.com with SMTP id f5so28401269iob.17 for ; Mon, 07 Oct 2019 12:39:07 -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:message-id:subject:from:to; bh=kKDb/JioBJlC3ZSH7Ra1D6u0wPhnpnLccidK2R6RBOc=; b=gAgwYyok8wAhjPjfB9RqdVY/TVnDEnUNSz1It1o+Zw2P0bAohmTj3pO5wtqV1Xp/f3 DuYlYK4BjRzNcQffsl3rdBo0/N+tShWV5yDDrKScQXx50bwXo2pXGhKlE4+UC3xdjqqj WO9dcMUkIQqqZIg8lsgpXNe1IcyvvYDV1qyvAGbxIstt7y9DS8A4Wm1DAJP2VjnAwRPn DmWnXWMqNvja7kyGHjCteAwISygzdcNy85urr5F8fnbxbbltSsd43BeC1c/FJlDPksaX 3p7E7pieAfESBU809RYwj5CQSM21Z2qHGC7no4ya+O6QGWDIDuDbag/Gui1kXBADl70H /7QQ== X-Gm-Message-State: APjAAAUqF8oKayoJPOOan5Se2Ks2L3s8AkLFuHw9rhykt3DYB2fM0C3e WNV4kXbnqQe4EKxu2ODOwRouCa8pKhAxfC4qZ7pY8nDV1hB8 X-Google-Smtp-Source: APXvYqxldHRIjyw1O4EjayR7Y53v5Fqnw/B/xW7orK7MItW9khT42lcNa9DPDqCKODNcniseUWxW2QA80sICOI8pqFH/Y0jO79O1 MIME-Version: 1.0 X-Received: by 2002:a92:5855:: with SMTP id m82mr31630600ilb.136.1570477147233; Mon, 07 Oct 2019 12:39:07 -0700 (PDT) Date: Mon, 07 Oct 2019 12:39:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007d25ff059457342d@google.com> Subject: KMSAN: uninit-value in alauda_check_media From: syzbot To: glider@google.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, syzkaller-bugs@googlegroups.com, usb-storage@lists.one-eyed-alien.net Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 1e76a3e5 kmsan: replace __GFP_NO_KMSAN_SHADOW with kmsan_i.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1204cc63600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=e7d46eb426883fb97efd compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123c860d600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110631b7600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e7d46eb426883fb97efd@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----status@alauda_check_media Variable was created at: alauda_check_media+0x8e/0x3310 drivers/usb/storage/alauda.c:454 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 ===================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12279 Comm: usb-storage Tainted: G B 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 panic+0x3c9/0xc1e kernel/panic.c:219 kmsan_report+0x2a2/0x2b0 mm/kmsan/kmsan_report.c:131 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 usb_stor_invoke_transport+0xf5/0x27e0 drivers/usb/storage/transport.c:606 usb_stor_transparent_scsi_command+0x5d/0x70 drivers/usb/storage/protocol.c:108 usb_stor_control_thread+0xca6/0x11a0 drivers/usb/storage/usb.c:380 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches