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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 2E308C4361B for ; Sat, 12 Dec 2020 17:44:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0B3622262 for ; Sat, 12 Dec 2020 17:44:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439505AbgLLRoD (ORCPT ); Sat, 12 Dec 2020 12:44:03 -0500 Received: from mail-il1-f199.google.com ([209.85.166.199]:51598 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2439433AbgLLRnv (ORCPT ); Sat, 12 Dec 2020 12:43:51 -0500 Received: by mail-il1-f199.google.com with SMTP id 1so6358233ilg.18 for ; Sat, 12 Dec 2020 09:43:35 -0800 (PST) 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=aSZGHDMYr39pdAExzWtTdZyDRsiSSJB+x/sK8AbEaCE=; b=jG8eGIjzoj1LIcMiCRFHrtTXDDZg6KHmL0b2FWVmpxMKIv+0fPt610a7l59ww3vON1 8ugwGATBZI3TzdKJFGzbFqYHxFkPfwk0o92GjhnjUurfTf47XCJrTbdlOT4cGSeiuHjX ztQKz1rlUI1erBr+sCqipDhpWQnsa0LUjkW7cfd3YCvQMbX7spX23ISBAL3HSFdoMPes N9xjg0GA4vGrqswox6botzaU2h/Mc1+yENPZSk+VX1CJ7z1LRNG+ghOrYsFSIhmQ/321 tb+3U1ZGsNDzWQPh+khg9zFAsfdsQCOw9jdHVNN9ag3X3CIjiJuDK1se9sUheXVB4aNc BVRA== X-Gm-Message-State: AOAM5331ryvEHpuoByQR+PBfFAIFQAaHC1pwIYudCG/OZlHLeIdm5bAx faGpbSPshXqPcxbLW/SUsA9bBfwzSsj8l5x+WYekDVDU/yM/ X-Google-Smtp-Source: ABdhPJxrL1TfLcbCV4wBF/uL3ocKjpSJ6geeoX7viRBgV2SDdoE8WQThYHUMOtsQpRS+m7UV4o4RTsuRh3lDgVql9Jx+TzcTIS0F MIME-Version: 1.0 X-Received: by 2002:a6b:c9cb:: with SMTP id z194mr22275866iof.110.1607794990282; Sat, 12 Dec 2020 09:43:10 -0800 (PST) Date: Sat, 12 Dec 2020 09:43:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000447ae005b647f1df@google.com> Subject: KMSAN: uninit-value in legacy_dvb_usb_read_remote_control From: syzbot To: glider@google.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=12d97ccb500000 kernel config: https://syzkaller.appspot.com/x/.config?x=eef728deea880383 dashboard link: https://syzkaller.appspot.com/bug?extid=2cd8c5db4a85f0a04142 compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=100658c5500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16e4cb9b500000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2cd8c5db4a85f0a04142@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in legacy_dvb_usb_read_remote_control+0x3b8/0x730 drivers/media/usb/dvb-usb/dvb-usb-remote.c:129 CPU: 0 PID: 8393 Comm: kworker/0:5 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events legacy_dvb_usb_read_remote_control Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 legacy_dvb_usb_read_remote_control+0x3b8/0x730 drivers/media/usb/dvb-usb/dvb-usb-remote.c:129 process_one_work+0x121c/0x1fc0 kernel/workqueue.c:2272 worker_thread+0x10cc/0x2740 kernel/workqueue.c:2418 kthread+0x51c/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Local variable ----state@legacy_dvb_usb_read_remote_control created at: legacy_dvb_usb_read_remote_control+0x68/0x730 drivers/media/usb/dvb-usb/dvb-usb-remote.c:120 legacy_dvb_usb_read_remote_control+0x68/0x730 drivers/media/usb/dvb-usb/dvb-usb-remote.c:120 ===================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8393 Comm: kworker/0:5 Tainted: G B 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events legacy_dvb_usb_read_remote_control Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 panic+0x4c8/0xea7 kernel/panic.c:231 kmsan_report+0x1da/0x1e0 mm/kmsan/kmsan_report.c:141 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 legacy_dvb_usb_read_remote_control+0x3b8/0x730 drivers/media/usb/dvb-usb/dvb-usb-remote.c:129 process_one_work+0x121c/0x1fc0 kernel/workqueue.c:2272 worker_thread+0x10cc/0x2740 kernel/workqueue.c:2418 kthread+0x51c/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Kernel Offset: disabled Rebooting in 86400 seconds.. --- This report is generated by a bot. It may contain errors. 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