From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 3DCEF35BDAA for ; Sun, 5 Jul 2026 10:23:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783247011; cv=none; b=mkjqQTUhltsGOm9QsBF9EutalZ4XYhhAMGtwHGBi3EyYSL/xR+OHKPxH5KwHZgid58+JQYy8RPMlVmWnkBH6VwJxpBaWvyX8ToJam+KOPyINwZazMc03kIS9oEbPbunNEt1OQDEKrlFQw1pfilVAxYEu1XblzJquvDoNzH4Irho= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783247011; c=relaxed/simple; bh=hNFmTnngxLSLsxsXNFj3jUEtk+Q5LmPPobqraYiAiUQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=souLVwP1psT647kgi2E/Aq4EyPMofm9HoR3kVykanqH5eHM4Sxo4sNza0WpT2caJAuTfaFE4YUrV7eQJmh3gT81PGdGqlAtWgK3lIRUA2jD5M7Go1p0W0mCq2GnOoNzExHGEleD+cGt7l1gw70tsm2Lm1PymIrPq8MI+rbMIEx8= 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=209.85.167.208 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-oi1-f208.google.com with SMTP id 5614622812f47-495b8b30310so2312974b6e.1 for ; Sun, 05 Jul 2026 03:23:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783247009; x=1783851809; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=d1f8miQPu5ASvBPSW17QlfKdLB3S/5ugH6lDJOVghNk=; b=oVjgMeV7pyYQeRs0ZsWWmVS2AgJPcDRnDNO8afQ0UNmBnGJTnG18KuIEixKXptuLl6 FH8MYSARB4lO1kW1HHjP/suHRdOy29sBZAfqUu5xoy6Etk91cXNZt7zIXfblq4q1q0Dl NavGR1F5AzfToS8MxamZtAnb6FtuOg44Tam3V8R9GsB2DRQjOUaZK5zdOpW49kMF3fk7 njD3PDGiBjzkClt6uP4PzOeDRQSn8JmfjwaNy6amGHcm478j6OHf04o4IX7SEnxH6dhb XEeaXNIRDgHw96qifH0lDmXZBfQZzM68KEzBWeIhDdPiYdJSJKSQHvb9o3YMQF4smgcy yraw== X-Forwarded-Encrypted: i=1; AFNElJ8spY0CVZIEGfyacbSvz80iR/bqpAANd804nUk2DyqC4mdoxsxEyQR/+6aGHhYxDMVyQqZ9o80FjWc=@vger.kernel.org X-Gm-Message-State: AOJu0Yz0b/eOzVjGb+qiy9hNkuwgiJn1VWV6xQ7671bvq9zj2i+HwkCE m6Il1Jg7WakqxxZhD56hz+QxBqcpLK4OW2XWCNCZGqIoCXxFM5PC5BgIs+9k9sMAjRj+V0APVI0 yl3wX1xhwCbsJLbGSjZsI9Nsf47KaJFoVss6USYnbwuH4lSZATY3+/DkWoso= Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c413:b0:496:c5a:e11d with SMTP id 5614622812f47-499b79f806amr4814279b6e.15.1783247009201; Sun, 05 Jul 2026 03:23:29 -0700 (PDT) Date: Sun, 05 Jul 2026 03:23:29 -0700 In-Reply-To: <69038243.a70a0220.5b2ed.0048.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a4a30a1.7b9523b0.16a4a.000b.GAE@google.com> Subject: Re: [syzbot] [usb?] BUG: corrupted list in usb_hcd_link_urb_to_ep (5) From: syzbot To: gregkh@linuxfoundation.org, hdanton@sina.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 2b763db0c276 Add linux-next specific files for 20260703 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11f96ffe580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bc069df559a09463 dashboard link: https://syzkaller.appspot.com/bug?extid=e69c25cf38a53d0cf64c compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a9dffe580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=103d8b1c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/48dad133dd60/disk-2b763db0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/df274fd385d1/vmlinux-2b763db0.xz kernel image: https://storage.googleapis.com/syzbot-assets/f3a54c0c16ec/bzImage-2b763db0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e69c25cf38a53d0cf64c@syzkaller.appspotmail.com list_add double add: new=ffff88801bf49818, prev=ffff88801bf49818, next=ffff888040cc4078. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:37! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 7510 Comm: syz.2.757 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__list_add_valid_or_report+0xa5/0x130 lib/list_debug.c:35 Code: 74 12 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 02 d7 79 06 cc 48 c7 c7 60 9c cb 8b 4c 89 fe 4c 89 f2 48 89 d9 e8 6c a0 50 fc 90 <0f> 0b 48 c7 c7 40 9a cb 8b e8 5d a0 50 fc 90 0f 0b 48 c7 c7 00 9b RSP: 0018:ffffc90005a3f320 EFLAGS: 00010246 RAX: 0000000000000058 RBX: ffff888040cc4078 RCX: aa19a771139add00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff11008198810 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff52000b47e15 R12: 1ffff110037e9303 R13: dffffc0000000000 R14: ffff88801bf49818 R15: ffff88801bf49818 FS: 00007fadf887e6c0(0000) GS:ffff888125b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f79a3b540 CR3: 000000003c4c0000 CR4: 00000000003526f0 Call Trace: __list_add_valid include/linux/list.h:96 [inline] __list_add include/linux/list.h:158 [inline] list_add_tail include/linux/list.h:191 [inline] usb_hcd_link_urb_to_ep+0x1d2/0x330 drivers/usb/core/hcd.c:1154 dummy_urb_enqueue+0x299/0x760 drivers/usb/gadget/udc/dummy_hcd.c:1292 usb_hcd_submit_urb+0x322/0x1b40 drivers/usb/core/hcd.c:1542 cm109_submit_buzz_toggle drivers/input/misc/cm109.c:351 [inline] cm109_toggle_buzzer_async drivers/input/misc/cm109.c:484 [inline] cm109_input_ev+0x1d1/0x3b0 drivers/input/misc/cm109.c:615 input_event_dispose+0x80/0x6b0 drivers/input/input.c:322 input_inject_event+0x1fa/0x310 drivers/input/input.c:424 kd_sound_helper+0x101/0x210 drivers/tty/vt/keyboard.c:257 input_handler_for_each_handle+0x101/0x1c0 drivers/input/input.c:2540 kd_mksound+0x96/0x130 drivers/tty/vt/keyboard.c:281 handle_ascii drivers/tty/vt/vt.c:2382 [inline] do_con_trol drivers/tty/vt/vt.c:2699 [inline] do_con_write+0x2f5a/0x5540 drivers/tty/vt/vt.c:3325 con_write+0x31/0x2e0 drivers/tty/vt/vt.c:3661 process_output_block drivers/tty/n_tty.c:557 [inline] n_tty_write+0xd4f/0x11e0 drivers/tty/n_tty.c:2366 iterate_tty_write drivers/tty/tty_io.c:1006 [inline] file_tty_write+0x50b/0x980 drivers/tty/tty_io.c:1081 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61e/0xbb0 fs/read_write.c:687 ksys_write+0x156/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fadf921de59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fadf887e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fadf94a5fa0 RCX: 00007fadf921de59 RDX: 000000000000045c RSI: 00002000000004c0 RDI: 0000000000000005 RBP: 00007fadf92b3e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fadf94a6038 R14: 00007fadf94a5fa0 R15: 00007ffcbb190028 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid_or_report+0xa5/0x130 lib/list_debug.c:35 Code: 74 12 b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d e9 02 d7 79 06 cc 48 c7 c7 60 9c cb 8b 4c 89 fe 4c 89 f2 48 89 d9 e8 6c a0 50 fc 90 <0f> 0b 48 c7 c7 40 9a cb 8b e8 5d a0 50 fc 90 0f 0b 48 c7 c7 00 9b RSP: 0018:ffffc90005a3f320 EFLAGS: 00010246 RAX: 0000000000000058 RBX: ffff888040cc4078 RCX: aa19a771139add00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff11008198810 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff52000b47e15 R12: 1ffff110037e9303 R13: dffffc0000000000 R14: ffff88801bf49818 R15: ffff88801bf49818 FS: 00007fadf887e6c0(0000) GS:ffff888125b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0f79a3b540 CR3: 000000003c4c0000 CR4: 00000000003526f0 --- 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.