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=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 A63D3C47404 for ; Thu, 3 Oct 2019 03:39:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87D8A21D81 for ; Thu, 3 Oct 2019 03:39:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728593AbfJCDjL (ORCPT ); Wed, 2 Oct 2019 23:39:11 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:36718 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728540AbfJCDjJ (ORCPT ); Wed, 2 Oct 2019 23:39:09 -0400 Received: by mail-io1-f70.google.com with SMTP id g126so3085921iof.3 for ; Wed, 02 Oct 2019 20:39:07 -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=mvJOaHk+FTZL9FNb7UAf3Jmr8rKxImWpF0+2sR45UOw=; b=gA0gqmzRTdyyaAVx3IXKf0qXBmTUFfuSE8+IuLRsmbjBEysr7DrDzloqJXz6tzLv5W /A/ntgahNI2B7Kk5jkFWNJJ5vSflUOoHEMfheGz3VoSn2ezOteHXeNhpXkctY1aguqqc FJ4p2h6ceTpSjEY/womLOvUdKm52b5WZIRTCEZb6b3wmx3aej96HcBqwg4O0tmK3+G/l P6n63XLh0LNR2tslOB7PVGr1r3veDUIxh4nhJlmwbb4nGya7634+0cYGUs+6jCwiy64W 2q9nkcURA+h3BKIbsDfYE2tXWawMiHGre8dT7LFHayAhhzWbt8Pfc/3RZYLF6EVb0MJV 7QLA== X-Gm-Message-State: APjAAAWoAjeghd8RbaA+UOSLXG+ptskiyTVvGCeK1wse22kOKX/adZQP nOF6lKS+S0+WvFbnYOHWwwARii6j46zLI0kowjH7u6KEebVC X-Google-Smtp-Source: APXvYqyVfwzpbA6LMRrTu2ruIncppD+gfoB8uXriSv6YxjGTpOn6O9m0rZxAdq57PC7sPCzETPZKKSadSKsz/qGlMoKjB4wXdv4h MIME-Version: 1.0 X-Received: by 2002:a05:6e02:683:: with SMTP id o3mr7342118ils.58.1570073947326; Wed, 02 Oct 2019 20:39:07 -0700 (PDT) Date: Wed, 02 Oct 2019 20:39:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e6d0f70593f953dd@google.com> Subject: KMSAN: uninit-value in cxusb_rc_query From: syzbot To: glider@google.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, mkrufky@linuxtv.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: cebbfdbc kmsan: merge set_no_shadow_page() and set_no_orig.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1277527e600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=98730b985cad4931a552 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10a648e5600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156af545600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+98730b985cad4931a552@syzkaller.appspotmail.com dvb-usb: bulk message failed: -22 (1/-30591) ================================================================== BUG: KMSAN: uninit-value in cxusb_rc_query+0x2f7/0x360 drivers/media/usb/dvb-usb/cxusb.c:547 CPU: 0 PID: 761 Comm: kworker/0:2 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events dvb_usb_read_remote_control Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 cxusb_rc_query+0x2f7/0x360 drivers/media/usb/dvb-usb/cxusb.c:547 dvb_usb_read_remote_control+0xf9/0x290 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355 Local variable description: ----ircode@cxusb_rc_query Variable was created at: cxusb_rc_query+0x4d/0x360 drivers/media/usb/dvb-usb/cxusb.c:543 dvb_usb_read_remote_control+0xf9/0x290 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 761 Comm: kworker/0:2 Tainted: G B 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events dvb_usb_read_remote_control 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+0x2ca/0x2d0 mm/kmsan/kmsan_report.c:129 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 cxusb_rc_query+0x2f7/0x360 drivers/media/usb/dvb-usb/cxusb.c:547 dvb_usb_read_remote_control+0xf9/0x290 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415 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. 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