From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 132BD1A5BA2 for ; Mon, 13 Oct 2025 22:09:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760393373; cv=none; b=tRCHr/xdLyyyF4wHYhIGqfGWIMiTs9hqYE/0qdf4Mt9ZNgSuW//43jAt4M4CryN6o7BNsn2WGyKQ1rohqexg7eIiyUaG6DjAHRbEKu6PMurug4+NS97DY7W2g/iE2nvdxrdhTrK7EKjSdfylygiGkONbJpfWfGXFC4pGIzcJjPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760393373; c=relaxed/simple; bh=8IoqDUZvnByJ9mvw3a8RIWIbHihcaXMG4jML6izeX4o=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=M5q3GiyCS41IFoOIgvNJ8i68QTwyEcX5PjeYoKeODNtIahBLh9bp2vfQ8t7lI1VSNGTtHHFCbzffqp20gqPojvYb1qtFvbjCdjeB45a5EKGMVjTf4R4fVydPLsVKqYyHoXGzv9U823mipm98V6ypc5rQelyg2ZgASbhvMi00LNs= 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=209.85.166.208 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-il1-f208.google.com with SMTP id e9e14a558f8ab-42f86e96381so137918805ab.1 for ; Mon, 13 Oct 2025 15:09:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760393371; x=1760998171; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8ec1wTm8Dfxtbgl7+JN4oUQsuTXuJwhC4tnsYXBjZkE=; b=TpPOwI7K8XjnadihsHyrWL86qxBiiSSahg+ct0Ty5AfQ/3pQLpw3fZH5QrVc+FcRrH kc9YW3DvMCFm125a3KLh0bhWME89EAd4lsofA62ew0VBGT9bHJBiMiCJ8VUbn1Yr6Szy dzBTCgNj1USEnAZOkSfE9dwfK+EC7W8+I8FRUGfgdwD43TArb/fWexbKQiwYFAG4JcV7 5XkeQZYPwpYNv0by2dhkRMIN4OCN003hqJbEqGDxiwkK8v/aj6FAX0L5k/yI+3tSS/jO V7/7oQL6fqFlxhvR3NZAGmKbSANxkp6WjyRziEWQHdi5IYrccc3BauL44WhiaAr4A2l/ KqGQ== X-Forwarded-Encrypted: i=1; AJvYcCVFoPqFgzAt1XjAUhoXxTe2O4DNm+FSiucSt+CwUEvr3bSqfKq16X+mHxcDTexfWOPFvamajKUaPRzWoSA=@vger.kernel.org X-Gm-Message-State: AOJu0YzfXxYDq7E5RyeHNGewvvBkN+mtLXZ7WvgNB5dJfttTy4ycJ/XG creuxyuYv07YZl8BXDK9cDme5W/Wqh8iQen9G8sjvCsdO3mFAUvuAkacrUFK/sjb730fCInDrHz ZhzQba1f2oh8wh6SDh2bbTpt9CpOJIY5zzgHGQlwZQDeJ2nnyP+cFTeg/y6M= X-Google-Smtp-Source: AGHT+IFTQifWmg3zDjnQ77HA/SplbzhJKj3Ui+rDN3t5MhumpFxfGFqP34Kll6+hWXzF8ULRE1mvFwFcZ9d8zBxsRh7hkWmixTTU Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:5e05:b0:42f:a779:6f43 with SMTP id e9e14a558f8ab-42fa779724bmr97421415ab.7.1760393371174; Mon, 13 Oct 2025 15:09:31 -0700 (PDT) Date: Mon, 13 Oct 2025 15:09:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68ed789b.050a0220.91a22.01f1.GAE@google.com> Subject: [syzbot] [pm?] INFO: task hung in rpm_resume (2) From: syzbot To: dakr@kernel.org, gregkh@linuxfoundation.org, lenb@kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, pavel@kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 64b229b5b681 usb: dwc3: dwc3-generic-plat: Add layerscape .. 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=14feb304580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1924ae3301255907 dashboard link: https://syzkaller.appspot.com/bug?extid=48dc1e8dfc92faf1124c compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119919e2580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15acdb34580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8706c6056174/disk-64b229b5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4a138e94650a/vmlinux-64b229b5.xz kernel image: https://storage.googleapis.com/syzbot-assets/5e83036b842b/bzImage-64b229b5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+48dc1e8dfc92faf1124c@syzkaller.appspotmail.com INFO: task kworker/1:1:42 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:23224 pid:42 tgid:42 ppid:2 task_flags:0x4288060 flags:0x00080000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 rpm_resume+0x587/0x1320 drivers/base/power/runtime.c:859 rpm_resume+0x72f/0x1320 drivers/base/power/runtime.c:917 __pm_runtime_resume+0xb6/0x170 drivers/base/power/runtime.c:1197 pm_runtime_get_active include/linux/pm_runtime.h:520 [inline] pm_runtime_resume_and_get include/linux/pm_runtime.h:539 [inline] usb_autopm_get_interface+0x20/0xe0 drivers/usb/core/driver.c:1864 aqc111_write_cmd drivers/net/usb/aqc111.c:132 [inline] aqc111_write32_cmd drivers/net/usb/aqc111.c:180 [inline] aqc111_suspend+0x7f8/0xb20 drivers/net/usb/aqc111.c:1409 usb_suspend_interface drivers/usb/core/driver.c:1323 [inline] usb_suspend_both+0x2ff/0xc70 drivers/usb/core/driver.c:1445 usb_runtime_suspend+0x49/0x180 drivers/usb/core/driver.c:1997 __rpm_callback+0xc5/0x610 drivers/base/power/runtime.c:406 rpm_callback+0xea/0x200 drivers/base/power/runtime.c:457 rpm_suspend+0x2e1/0x11d0 drivers/base/power/runtime.c:698 __pm_runtime_suspend+0xba/0x1a0 drivers/base/power/runtime.c:1167 pm_runtime_put_sync_autosuspend include/linux/pm_runtime.h:728 [inline] usb_new_device+0x1025/0x1a60 drivers/usb/core/hub.c:2721 hub_port_connect drivers/usb/core/hub.c:5561 [inline] hub_port_connect_change drivers/usb/core/hub.c:5701 [inline] port_event drivers/usb/core/hub.c:5865 [inline] hub_event+0x2fce/0x5060 drivers/usb/core/hub.c:5947 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x56a/0x700 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task dhcpcd:2894 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:24504 pid:2894 tgid:2894 ppid:2893 task_flags:0x400140 flags:0x00080001 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x12fc/0x3b80 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 rpm_resume+0x587/0x1320 drivers/base/power/runtime.c:859 rpm_resume+0x72f/0x1320 drivers/base/power/runtime.c:917 __pm_runtime_resume+0xb6/0x170 drivers/base/power/runtime.c:1197 pm_runtime_get_active include/linux/pm_runtime.h:520 [inline] pm_runtime_resume_and_get include/linux/pm_runtime.h:539 [inline] usb_autopm_get_interface+0x20/0xe0 drivers/usb/core/driver.c:1864 usbnet_open+0x71/0xbe0 drivers/net/usb/usbnet.c:899 __dev_open+0x3a3/0x850 net/core/dev.c:1682 __dev_change_flags+0x55d/0x720 net/core/dev.c:9637 netif_change_flags+0x8d/0x160 net/core/dev.c:9700 dev_change_flags+0xb6/0x170 net/core/dev_api.c:68 devinet_ioctl+0x11d5/0x1f50 net/ipv4/devinet.c:1199 inet_ioctl+0x3a7/0x3f0 net/ipv4/af_inet.c:1003 sock_do_ioctl+0x118/0x280 net/socket.c:1254 sock_ioctl+0x42f/0x6a0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4d0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcbde649378 RSP: 002b:00007ffdcdfa7d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fcbde649378 RDX: 00007ffdcdfb7f10 RSI: 0000000000008914 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdcdfc80b0 R13: 00007fcbde5496c8 R14: 0000000000000028 R15: 0000000000008914 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff892c89a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff892c89a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff892c89a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775 3 locks held by kworker/1:1/42: #0: ffff8881072e5948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3238 #1: ffffc900002c7d10 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3239 #2: ffff88810b74b198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #2: ffff88810b74b198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1be/0x5060 drivers/usb/core/hub.c:5893 3 locks held by kworker/u8:3/48: #0: ffff888111b47148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3238 #1: ffffc90000537d10 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3239 #2: ffffffff8a630488 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff8a630488 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4734 1 lock held by dhcpcd/2894: #0: ffffffff8a630488 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #0: ffffffff8a630488 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x26d/0x1f50 net/ipv4/devinet.c:1120 2 locks held by getty/2917: #0: ffff8881123490a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0xf3f/0x1170 kernel/hung_task.c:495 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x56a/0x700 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] RIP: 0010:sysvec_call_function_single+0x7b/0xb0 arch/x86/kernel/smp.c:266 Code: c7 c7 60 0f 65 87 e8 e4 22 00 00 48 c7 c7 20 0f 65 87 65 c6 05 ef 7e 53 05 01 e8 d0 22 00 00 65 4c 8b 1d a8 7e 53 05 49 89 23 <4c> 89 dc e8 6d bd fe f9 48 89 df e8 f5 a0 f3 f9 e8 60 be fe f9 5c RSP: 0018:ffffffff89007d40 EFLAGS: 00000092 RAX: 0000000000000000 RBX: ffffffff89007d58 RCX: ffffffff8186489f RDX: 0000000000000000 RSI: ffffffff87650f20 RDI: ffffffff87897640 RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff15419fa R10: ffffffff8aa0cfd7 R11: ffffc90000007ff8 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888268ea4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8efbda21e0 CR3: 0000000114588000 CR4: 00000000003506f0 Call Trace: asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82 Code: 2a 9c 01 e9 53 b6 02 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d d3 89 21 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffffff89007e08 EFLAGS: 000002c2 RAX: 00000000000cedbb RBX: 0000000000000000 RCX: ffffffff87445b79 RDX: 0000000000000000 RSI: ffffffff88c876c2 RDI: ffffffff87897640 RBP: fffffbfff1205d38 R08: 0000000000000001 R09: ffffed103eb06605 R10: ffff8881f583302b R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8902e9c0 R14: ffffffff8aa0cfd0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x38d/0x500 kernel/sched/idle.c:330 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428 rest_init+0x16b/0x2b0 init/main.c:757 start_kernel+0x3ee/0x4d0 init/main.c:1111 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x148 --- 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