From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6002124A07C for ; Sun, 8 Mar 2026 04:12:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772943148; cv=none; b=lYBg2GK1F9qnVKWg1+qoZVczuKkeOGQy6/hiROQWx3Vp/9TQH7yu7LOZ1tH/v9WyKmmuhqammTxH1e/plbhiAbe54Uadp7rge+0LGSIc4fWIg8QVC6cpKxM5qDekZcXQVJLU2p8mFIgZzbVONFj5jGH6GsNyAVA9o8yWQ3+AMmQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772943148; c=relaxed/simple; bh=qYRRhJ/rjVX6gADAftLWWxxgi7AUGT+kfAfgu9FnizM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=SEabc64uUAUKOhXu4fLdrl/joOoeaacjIkVtYWbTrsbZnKc8HhZvF5N/kmLPu3o79Ync/j7Fb6PNLAPAPGuct9PndEyY5e+5AhWKfnr6+xE+avL/vyzGSYMHwH90do0s61d2nwfyOTphzVjd6cCk0SsYYO8QeX/02qu3N0deaPY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f71.google.com with SMTP id 006d021491bc7-679caf7ec07so171677831eaf.1 for ; Sat, 07 Mar 2026 20:12:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772943146; x=1773547946; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=zA1wgT+unS1d+T7tI8dP5Kbt/EPIFkFNGoMj1Twx1A8=; b=WeGKgN9LuFxXIEoogOFzjGOqA/GN/tQeddla96RVARm97F81ksqvmtQoTSgUpAzWXO Dq4MgDgut0SfKwKK72ke9kD9TuSlKxpOTruH7z+pgyn+ZlVDjeIKRhJW2BIH7NcmmkMA EEX6nbYLp7GEDyHbbRwEcZ3FYYRAbke0ptDaOYrgx/gPpIrw9kXvP9yZM8jKAZOmxyJx J3SOCJ4K0jiU27rQsZNxiuTkFBsoZ5HVbktsmX+uHtJjTLl6Z35Jha6MbhKyhu2osiEX Gh32WtrYVYWbuXiPs7j66FhCHRwyseMcVcvqYWuzoyVf/HdNc8Jcz0CeL9zxCNJ70Jus gTNQ== X-Forwarded-Encrypted: i=1; AJvYcCVIvomWY5A6cG7aEZSKBO0QrIgGxYwgJKjKeuZJokf/8NmkrEZvyud4te8bn3Vape8UQB/554wY7k4=@vger.kernel.org X-Gm-Message-State: AOJu0Yy33MEGwc7exA3llc0xGZycQ5S9EtAFaclx07DaeTUeEso3tMh4 AyhrBKgz+WLmCkbZsfEXGls3AHt0+zDkKh8XkhhrkzUsPy8kfvgKw9ImvMz2nyy+wlYb81PX3pp SPLPGiaTFprSIZYfeO1QcGDW5T3Lgl3tSBJvxGsfNUwSkvVNXcxnAHwkhkLo= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4b92:b0:679:975b:f227 with SMTP id 006d021491bc7-67b9bd2e167mr4624023eaf.42.1772943146303; Sat, 07 Mar 2026 20:12:26 -0800 (PST) Date: Sat, 07 Mar 2026 20:12:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69acf72a.050a0220.310d8.0004.GAE@google.com> Subject: [syzbot] [sound?] general protection fault in snd_scarlett2_init From: syzbot To: g@b4.vu, linux-kernel@vger.kernel.org, linux-sound@vger.kernel.org, linux-usb@vger.kernel.org, perex@perex.cz, syzkaller-bugs@googlegroups.com, tiwai@suse.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: bb375c251ab4 dt-bindings: usb: st,st-ohci-300x: convert to.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=138f1b5a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f1500201919951cc dashboard link: https://syzkaller.appspot.com/bug?extid=ae893a8901067fde2741 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14ffb006580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ebbb5a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2475c3172471/disk-bb375c25.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/30449aa672dd/vmlinux-bb375c25.xz kernel image: https://storage.googleapis.com/syzbot-assets/46d3937d1c16/bzImage-bb375c25.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ae893a8901067fde2741@syzkaller.appspotmail.com usb 4-1: 0:6 : does not exist usb 4-1: 0:7 : does not exist usb 4-1: 0:8 : does not exist usb 4-1: 0:9 : does not exist usb 4-1: 0:10 : does not exist usb 4-1: Focusrite Scarlett Gen 3 Mixer Driver enabled (pid=0x8215); report any issues to https://github.com/geoffreybennett/scarlett-gen2/issues Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 28 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_endpoint_num include/uapi/linux/usb/ch9.h:479 [inline] RIP: 0010:scarlett2_find_fc_interface sound/usb/mixer_scarlett2.c:8261 [inline] RIP: 0010:scarlett2_init_private sound/usb/mixer_scarlett2.c:8295 [inline] RIP: 0010:snd_scarlett2_controls_create sound/usb/mixer_scarlett2.c:8684 [inline] RIP: 0010:snd_scarlett2_init.cold+0xbad/0x6c79 sound/usb/mixer_scarlett2.c:9407 Code: 84 c0 74 06 0f 8e ca 0b 00 00 48 8b 44 24 20 48 8d 7b 02 48 89 fa 40 88 a8 48 02 00 00 b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 9e 0b 00 00 RSP: 0018:ffffc900001e68d8 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81543c4b RDX: 0000000000000000 RSI: ffffffff81543c5d RDI: 0000000000000002 RBP: 0000000000000001 R08: 0000000000000001 R09: 00000000000000ff R10: 00000000000000ff R11: 0000000000000000 R12: ffff88811dd24804 R13: dffffc0000000000 R14: ffff88811dd248a8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8882687d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558c34efbe88 CR3: 00000000094ae000 CR4: 00000000003506f0 Call Trace: snd_usb_mixer_apply_create_quirk+0x1c21/0x2b80 sound/usb/mixer_quirks.c:4446 snd_usb_create_mixer+0x7a2/0x1910 sound/usb/mixer.c:3641 usb_audio_probe+0xf6d/0x3a90 sound/usb/card.c:1033 usb_probe_interface+0x303/0x8f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:583 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:661 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2208 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:583 [inline] really_probe+0x241/0xa60 drivers/base/dd.c:661 __driver_probe_device+0x1de/0x400 drivers/base/dd.c:803 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:833 __device_attach_driver+0x1ff/0x3e0 drivers/base/dd.c:961 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1033 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1088 bus_probe_device+0x64/0x160 drivers/base/bus.c:574 device_add+0x11d9/0x1950 drivers/base/core.c:3689 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953 process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x5da/0xe40 kernel/workqueue.c:3439 kthread+0x370/0x450 kernel/kthread.c:467 ret_from_fork+0x6c3/0xcb0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:usb_endpoint_num include/uapi/linux/usb/ch9.h:479 [inline] RIP: 0010:scarlett2_find_fc_interface sound/usb/mixer_scarlett2.c:8261 [inline] RIP: 0010:scarlett2_init_private sound/usb/mixer_scarlett2.c:8295 [inline] RIP: 0010:snd_scarlett2_controls_create sound/usb/mixer_scarlett2.c:8684 [inline] RIP: 0010:snd_scarlett2_init.cold+0xbad/0x6c79 sound/usb/mixer_scarlett2.c:9407 Code: 84 c0 74 06 0f 8e ca 0b 00 00 48 8b 44 24 20 48 8d 7b 02 48 89 fa 40 88 a8 48 02 00 00 b8 ff ff 37 00 48 c1 ea 03 48 c1 e0 2a <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 9e 0b 00 00 RSP: 0018:ffffc900001e68d8 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81543c4b RDX: 0000000000000000 RSI: ffffffff81543c5d RDI: 0000000000000002 RBP: 0000000000000001 R08: 0000000000000001 R09: 00000000000000ff R10: 00000000000000ff R11: 0000000000000000 R12: ffff88811dd24804 R13: dffffc0000000000 R14: ffff88811dd248a8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8882687d3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4cb1355900 CR3: 00000001175e2000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 84 c0 test %al,%al 2: 74 06 je 0xa 4: 0f 8e ca 0b 00 00 jle 0xbd4 a: 48 8b 44 24 20 mov 0x20(%rsp),%rax f: 48 8d 7b 02 lea 0x2(%rbx),%rdi 13: 48 89 fa mov %rdi,%rdx 16: 40 88 a8 48 02 00 00 mov %bpl,0x248(%rax) 1d: b8 ff ff 37 00 mov $0x37ffff,%eax 22: 48 c1 ea 03 shr $0x3,%rdx 26: 48 c1 e0 2a shl $0x2a,%rax * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 48 89 fa mov %rdi,%rdx 31: 83 e2 07 and $0x7,%edx 34: 38 d0 cmp %dl,%al 36: 7f 08 jg 0x40 38: 84 c0 test %al,%al 3a: 0f 85 9e 0b 00 00 jne 0xbde --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup