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 13B77C433E0 for ; Wed, 3 Jun 2020 05:41:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC7972072F for ; Wed, 3 Jun 2020 05:41:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725866AbgFCFlS (ORCPT ); Wed, 3 Jun 2020 01:41:18 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:44160 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725855AbgFCFlS (ORCPT ); Wed, 3 Jun 2020 01:41:18 -0400 Received: by mail-il1-f198.google.com with SMTP id b8so711093ilr.11 for ; Tue, 02 Jun 2020 22:41:17 -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=7PaEP4t/B3kjXAbvlDlHJVPzwZvbdoEtutPTrhsFWoQ=; b=PFSouSt2MrkJyonfOZHLwVexxTPzx1ITMJ5Pnuj0rDbt1B8wuVlBo7OYoeWKxheOQ+ C1idRUZQKFlgFFr+5xjHIXu0qxuuhPkOPGKE88GIwYIKyubooJweHBzc1jSfDJbDie33 rEqUw4hQGsRt0ek/tWSlyhRQ3p4Wm4mjWCnWKTcGqQ1AIqtXJ08T5Hw8d75LOyiTuT9Y uIeflB3/k19rxaMpwmT20uVFOU0QkoKxpvN0ydndNoDshF0koIsXwRlKqGxFu0SixQTc K/q5y5TK752rt7GIqnBGFWxlg9DmA3PPRvT0Y3yGwlh4jnpkR2mJil2D/9jTeF4YfWIU q5tg== X-Gm-Message-State: AOAM533JQ/jxaoQ7e3Ot/h2GfZwI7GVOYGemUQkp/ayx8jekqkEtA238 X6cwJi9cpawSmHFUka/6fp7+4I3hX/bTCQtLj2Dlgr2H079n X-Google-Smtp-Source: ABdhPJw8f0fUZU9WLJrKfj4Zf3cfsWMIJgeIP97nKn/peVLTrc3yEoIobmLcvScJqjw+IkFqoqIl2uHaHfiJNbTCmdjDBo/kMwho MIME-Version: 1.0 X-Received: by 2002:a02:810:: with SMTP id 16mr28697375jac.17.1591162876898; Tue, 02 Jun 2020 22:41:16 -0700 (PDT) Date: Tue, 02 Jun 2020 22:41:16 -0700 In-Reply-To: <000000000000bbd09005a6fdc6cc@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000000eb4b905a7277a7d@google.com> Subject: Re: WARNING in snd_usbmidi_submit_urb/usb_submit_urb From: syzbot To: andreyknvl@google.com, balbi@kernel.org, gregkh@linuxfoundation.org, ingrassia@epigenesys.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 1ee08de1 Merge tag 'for-5.8/io_uring-2020-06-01' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15f9e516100000 kernel config: https://syzkaller.appspot.com/x/.config?x=b46ebd806238a886 dashboard link: https://syzkaller.appspot.com/bug?extid=5f1d24c49c1d2c427497 compiler: gcc (GCC) 9.0.0 20181231 (experimental) userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1667dcca100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13f9e516100000 The bug was bisected to: commit f2c2e717642c66f7fe7e5dd69b2e8ff5849f4d10 Author: Andrey Konovalov Date: Mon Feb 24 16:13:03 2020 +0000 usb: gadget: add raw-gadget interface bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=164afcf2100000 final crash: https://syzkaller.appspot.com/x/report.txt?x=154afcf2100000 console output: https://syzkaller.appspot.com/x/log.txt?x=114afcf2100000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5f1d24c49c1d2c427497@syzkaller.appspotmail.com Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") ------------[ cut here ]------------ URB 0000000044767a7f submitted while active WARNING: CPU: 1 PID: 9186 at drivers/usb/core/urb.c:363 usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:363 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9186 Comm: syz-executor730 Not tainted 5.7.0-syzkaller #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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:105 [inline] fixup_bug arch/x86/kernel/traps.c:100 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:197 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:usb_submit_urb+0x10c1/0x13b0 drivers/usb/core/urb.c:363 Code: 89 de e8 c2 16 66 fc 84 db 0f 85 42 f6 ff ff e8 85 15 66 fc 4c 89 fe 48 c7 c7 40 b3 ab 88 c6 05 98 27 78 05 01 e8 57 29 37 fc <0f> 0b e9 20 f6 ff ff c7 44 24 14 01 00 00 00 e9 d7 f6 ff ff 41 bd RSP: 0018:ffffc90007dc72b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815cd4c7 RDI: fffff52000fb8e48 RBP: dffffc0000000000 R08: ffff888095b144c0 R09: ffffed1015ce45f1 R10: ffff8880ae722f83 R11: ffffed1015ce45f0 R12: 0000000000000cc0 R13: 00000000fffffff0 R14: ffff888095974000 R15: ffff88809fa06600 snd_usbmidi_submit_urb+0x19/0x60 sound/usb/midi.c:194 snd_usbmidi_input_start_ep sound/usb/midi.c:2313 [inline] snd_usbmidi_input_start.part.0+0xbe/0x1c0 sound/usb/midi.c:2329 snd_usbmidi_input_start sound/usb/midi.c:1119 [inline] substream_open.isra.0+0x505/0x830 sound/usb/midi.c:1119 open_substream+0x42e/0x880 sound/core/rawmidi.c:299 rawmidi_open_priv+0x2e8/0x6e0 sound/core/rawmidi.c:342 snd_rawmidi_kernel_open+0x1b5/0x270 sound/core/rawmidi.c:382 midisynth_subscribe+0xf2/0x330 sound/core/seq/seq_midi.c:170 subscribe_port sound/core/seq/seq_ports.c:412 [inline] check_and_subscribe_port+0x5b5/0x800 sound/core/seq/seq_ports.c:495 snd_seq_port_connect+0x2e4/0x510 sound/core/seq/seq_ports.c:564 snd_seq_ioctl_subscribe_port+0x1df/0x310 sound/core/seq/seq_clientmgr.c:1484 snd_seq_kernel_client_ctl+0xeb/0x130 sound/core/seq/seq_clientmgr.c:2353 snd_seq_oss_midi_open+0x3cb/0x640 sound/core/seq/oss/seq_oss_midi.c:364 snd_seq_oss_synth_setup_midi+0x123/0x520 sound/core/seq/oss/seq_oss_synth.c:269 snd_seq_oss_open+0x7fa/0x980 sound/core/seq/oss/seq_oss_init.c:261 odev_open+0x6c/0x90 sound/core/seq/oss/seq_oss.c:125 soundcore_open+0x446/0x600 sound/sound_core.c:593 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x546/0x1340 fs/open.c:828 do_open fs/namei.c:3229 [inline] path_openat+0x1e59/0x27d0 fs/namei.c:3346 do_filp_open+0x192/0x260 fs/namei.c:3373 do_sys_openat2+0x585/0x7d0 fs/open.c:1179 do_sys_open+0xc3/0x140 fs/open.c:1195 do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] do_fast_syscall_32+0x270/0xe90 arch/x86/entry/common.c:396 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Kernel Offset: disabled Rebooting in 86400 seconds..