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 3535BC10F14 for ; Tue, 8 Oct 2019 22:29:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 159A820873 for ; Tue, 8 Oct 2019 22:29:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727115AbfJHW3J (ORCPT ); Tue, 8 Oct 2019 18:29:09 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:40141 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725879AbfJHW3J (ORCPT ); Tue, 8 Oct 2019 18:29:09 -0400 Received: by mail-io1-f69.google.com with SMTP id r20so932002ioh.7 for ; Tue, 08 Oct 2019 15:29:09 -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=jVNpj39i7xvK8MWgtKNyHcAmTmAx0cA9HUYpZ02atfs=; b=oL2kzy9pXik/zNBRo8n+qHyOrDqDU2EpGvGwwMJZJwWdHOukA8W8/TWny+b3b0KpFR foB/Ox4+qjqtyqgFV7GNDs7VdIMsDlekKHAH/o9CKOgwfqQTk8Wq2X9RJaOvDqfBTXwd zSiEDA2HbJrYKb9n8TPxsqi93f2V9euPKvlSoqCCPMgaM0eU468e6fPYrLLMk4nwo54G NECG/uh6n2JdBkvRaZmwUF1XUfpJVWoHfmARqkCn5Om2kKnli7+FOranWSaP8X8ToRXr +tuMT2kORqk6M8f9MhLEi9rf/Ckwd5OpV+iMwwsMSSCpwkOpwIndXfhXVm6/QZmYAFHY V/6g== X-Gm-Message-State: APjAAAVLL/fThz6I4zg6pVpzZlBddYNJyLukFWHRhfb5PfIMu/zGhl8o sBj4Jhudr0L/ow8a+VnfztoLteM+VVP9BGMBqIMZffQQ4A93 X-Google-Smtp-Source: APXvYqwL0qHuZSap+ExhhuRbTa9K5CfNjcj8eimDFS5NP3QrMmCUb4Dk1KGAKMjlKfYDqC4T4wxdh0NGmkoVr8VnUQ9eu9IByaJ/ MIME-Version: 1.0 X-Received: by 2002:a92:17c4:: with SMTP id 65mr704706ilx.28.1570573748770; Tue, 08 Oct 2019 15:29:08 -0700 (PDT) Date: Tue, 08 Oct 2019 15:29:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000639e6005946db2ed@google.com> Subject: KMSAN: uninit-value in bsearch From: syzbot To: benpicco@googlemail.com, glider@google.com, hias@horus.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, patrick9876@free.fr, sean@mess.org, syzkaller-bugs@googlegroups.com 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=130b16fd600000 kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d dashboard link: https://syzkaller.appspot.com/bug?extid=427ce10b72235583ef69 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+427ce10b72235583ef69@syzkaller.appspotmail.com dvb-usb: bulk message failed: -22 (1/-30591) ===================================================== BUG: KMSAN: uninit-value in ir_lookup_by_scancode drivers/media/rc/rc-main.c:494 [inline] BUG: KMSAN: uninit-value in rc_g_keycode_from_table drivers/media/rc/rc-main.c:582 [inline] BUG: KMSAN: uninit-value in rc_keydown+0x1a6/0x6f0 drivers/media/rc/rc-main.c:816 CPU: 1 PID: 11436 Comm: kworker/1:2 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+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 bsearch+0x1dd/0x250 lib/bsearch.c:41 ir_lookup_by_scancode drivers/media/rc/rc-main.c:494 [inline] rc_g_keycode_from_table drivers/media/rc/rc-main.c:582 [inline] rc_keydown+0x1a6/0x6f0 drivers/media/rc/rc-main.c:816 cxusb_rc_query+0x2e1/0x360 drivers/media/usb/dvb-usb/cxusb.c:548 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline] kmsan_internal_chain_origin+0xd2/0x170 mm/kmsan/kmsan.c:314 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:184 rc_g_keycode_from_table drivers/media/rc/rc-main.c:583 [inline] rc_keydown+0x2c4/0x6f0 drivers/media/rc/rc-main.c:816 cxusb_rc_query+0x2e1/0x360 drivers/media/usb/dvb-usb/cxusb.c:548 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 ===================================================== --- 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.