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(dynamic-2a01-0c22-72bb-b200-d170-f5fb-7a97-42d6.c22.pool.telefonica.de. [2a01:c22:72bb:b200:d170:f5fb:7a97:42d6]) by smtp.googlemail.com with ESMTPSA id my47-20020a1709065a6f00b00a4e7c2b2070sm851629ejc.8.2024.04.05.06.31.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Apr 2024 06:31:33 -0700 (PDT) Message-ID: Date: Fri, 5 Apr 2024 15:31:34 +0200 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Deadlock in pciehp on dock disconnect To: Lukas Wunner , Roman Lozko Cc: linux-pci@vger.kernel.org, Bjorn Helgaas , Dave Hansen , Sean Christopherson , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, Christian Marangi , Kurt Kanzenbach , Jesse Brandeburg , Tony Nguyen , intel-wired-lan@lists.osuosl.org References: Content-Language: en-US From: Heiner Kallweit Autocrypt: addr=hkallweit1@gmail.com; keydata= xsFNBF/0ZFUBEAC0eZyktSE7ZNO1SFXL6cQ4i4g6Ah3mOUIXSB4pCY5kQ6OLKHh0FlOD5/5/ sY7IoIouzOjyFdFPnz4Bl3927ClT567hUJJ+SNaFEiJ9vadI6vZm2gcY4ExdIevYHWe1msJF MVE4yNwdS+UsPeCF/6CQQTzHc+n7DomE7fjJD5J1hOJjqz2XWe71fTvYXzxCFLwXXbBiqDC9 dNqOe5odPsa4TsWZ09T33g5n2nzTJs4Zw8fCy8rLqix/raVsqr8fw5qM66MVtdmEljFaJ9N8 /W56qGCp+H8Igk/F7CjlbWXiOlKHA25mPTmbVp7VlFsvsmMokr/imQr+0nXtmvYVaKEUwY2g 86IU6RAOuA8E0J5bD/BeyZdMyVEtX1kT404UJZekFytJZrDZetwxM/cAH+1fMx4z751WJmxQ J7mIXSPuDfeJhRDt9sGM6aRVfXbZt+wBogxyXepmnlv9K4A13z9DVLdKLrYUiu9/5QEl6fgI kPaXlAZmJsQfoKbmPqCHVRYj1lpQtDM/2/BO6gHASflWUHzwmBVZbS/XRs64uJO8CB3+V3fa cIivllReueGCMsHh6/8wgPAyopXOWOxbLsZ291fmZqIR0L5Y6b2HvdFN1Xhc+YrQ8TKK+Z4R mJRDh0wNQ8Gm89g92/YkHji4jIWlp2fwzCcx5+lZCQ1XdqAiHQARAQABzSZIZWluZXIgS2Fs bHdlaXQgPGhrYWxsd2VpdDFAZ21haWwuY29tPsLBjgQTAQgAOBYhBGxfqY/yOyXjyjJehXLe ig9U8DoMBQJf9GRVAhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAAAoJEHLeig9U8DoMSycQ AJbfg8HZEK0ljV4M8nvdaiNixWAufrcZ+SD8zhbxl8GispK4F3Yo+20Y3UoZ7FcIidJWUUJL axAOkpI/70YNhlqAPMsuudlAieeYZKjIv1WV5ucNZ3VJ7dC+dlVqQdAr1iD869FZXvy91KhJ wYulyCf+s4T9YgmLC6jLMBZghKIf1uhSd0NzjyCqYWbk2ZxByZHgunEShOhHPHswu3Am0ftt ePaYIHgZs+Vzwfjs8I7EuW/5/f5G9w1vibXxtGY/GXwgGGHRDjFM7RSprGOv4F5eMGh+NFUJ TU9N96PQYMwXVxnQfRXl8O6ffSVmFx4H9rovxWPKobLmqQL0WKLLVvA/aOHCcMKgfyKRcLah 57vGC50Ga8oT2K1g0AhKGkyJo7lGXkMu5yEs0m9O+btqAB261/E3DRxfI1P/tvDZpLJKtq35 dXsj6sjvhgX7VxXhY1wE54uqLLHY3UZQlmH3QF5t80MS7/KhxB1pO1Cpcmkt9hgyzH8+5org +9wWxGUtJWNP7CppY+qvv3SZtKJMKsxqk5coBGwNkMms56z4qfJm2PUtJQGjA65XWdzQACib 2iaDQoBqGZfXRdPT0tC1H5kUJuOX4ll1hI/HBMEFCcO8++Bl2wcrUsAxLzGvhINVJX2DAQaF aNetToazkCnzubKfBOyiTqFJ0b63c5dqziAgzsFNBF/0ZFUBEADF8UEZmKDl1w/UxvjeyAeX kghYkY3bkK6gcIYXdLRfJw12GbvMioSguvVzASVHG8h7NbNjk1yur6AONfbUpXKSNZ0skV8V fG+ppbaY+zQofsSMoj5gP0amwbwvPzVqZCYJai81VobefTX2MZM2Mg/ThBVtGyzV3NeCpnBa 8AX3s9rrX2XUoCibYotbbxx9afZYUFyflOc7kEpc9uJXIdaxS2Z6MnYLHsyVjiU6tzKCiVOU KJevqvzPXJmy0xaOVf7mhFSNQyJTrZpLa+tvB1DQRS08CqYtIMxRrVtC0t0LFeQGly6bOngr ircurWJiJKbSXVstLHgWYiq3/GmCSx/82ObeLO3PftklpRj8d+kFbrvrqBgjWtMH4WtK5uN5 1WJ71hWJfNchKRlaJ3GWy8KolCAoGsQMovn/ZEXxrGs1ndafu47yXOpuDAozoHTBGvuSXSZo ythk/0EAuz5IkwkhYBT1MGIAvNSn9ivE5aRnBazugy0rTRkVggHvt3/7flFHlGVGpBHxFUwb /a4UjJBPtIwa4tWR8B1Ma36S8Jk456k2n1id7M0LQ+eqstmp6Y+UB+pt9NX6t0Slw1NCdYTW gJezWTVKF7pmTdXszXGxlc9kTrVUz04PqPjnYbv5UWuDd2eyzGjrrFOsJEi8OK2d2j4FfF++ AzOMdW09JVqejQARAQABwsF2BBgBCAAgFiEEbF+pj/I7JePKMl6Fct6KD1TwOgwFAl/0ZFUC GwwACgkQct6KD1TwOgxUfg//eAoYc0Vm4NrxymfcY30UjHVD0LgSvU8kUmXxil3qhFPS7KA+ y7tgcKLHOkZkXMX5MLFcS9+SmrAjSBBV8omKoHNo+kfFx/dUAtz0lot8wNGmWb+NcHeKM1eb nwUMOEa1uDdfZeKef/U/2uHBceY7Gc6zPZPWgXghEyQMTH2UhLgeam8yglyO+A6RXCh+s6ak Wje7Vo1wGK4eYxp6pwMPJXLMsI0ii/2k3YPEJPv+yJf90MbYyQSbkTwZhrsokjQEaIfjrIk3 rQRjTve/J62WIO28IbY/mENuGgWehRlTAbhC4BLTZ5uYS0YMQCR7v9UGMWdNWXFyrOB6PjSu Trn9MsPoUc8qI72mVpxEXQDLlrd2ijEWm7Nrf52YMD7hL6rXXuis7R6zY8WnnBhW0uCfhajx q+KuARXC0sDLztcjaS3ayXonpoCPZep2Bd5xqE4Ln8/COCslP7E92W1uf1EcdXXIrx1acg21 H/0Z53okMykVs3a8tECPHIxnre2UxKdTbCEkjkR4V6JyplTS47oWMw3zyI7zkaadfzVFBxk2 lo/Tny+FX1Azea3Ce7oOnRUEZtWSsUidtIjmL8YUQFZYm+JUIgfRmSpMFq8JP4VH43GXpB/S OCrl+/xujzvoUBFV/cHKjEQYBxo+MaiQa1U54ykM2W4DnHb1UiEf5xDkFd4= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 05.04.2024 12:02, Lukas Wunner wrote: > [cc += netdev maintainers] > > On Fri, Apr 05, 2024 at 11:14:01AM +0200, Roman Lozko wrote: >> Hi, I'm using HP G4 Thunderbolt docking station, and recently (?) >> kernel started to "partially" deadlock after disconnecting the dock >> station. This results in inability to turn network interfaces on or >> off, system can't reboot, `sudo` does not work (guess because it uses >> DNS). >> >> It started to occur ~two weeks ago, don't know why, I did not change >> anything at that time. First seen on 6.8.2, nothing changed with >> 6.9.0-rc2. > > This is not a pciehp issue, it's a networking issue: > > In the stacktrace you've provided below, the rtnl_lock() is acquired > recursively, which leads to the deadlock: > > unregister_netdev() acquires rtnl_lock(), indirectly invokes > netdev_trig_deactivate() upon unregistering some LED, thereby > calling unregister_netdevice_notifier(), which tries to > acquire rtnl_lock() again. > >>>From a quick look at the source files involved, this doesn't look > like something new, though I note LED support for igc was added > only recently with ea578703b03d ("igc: Add support for LEDs on > i225/i226"), which went into v6.9-rc1. > > The other hanging tasks are simply waiting for rtnl_lock() as well. > > >> pciehp stack trace: >> INFO: task irq/122-pciehp:209 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:irq/122-pciehp state:D stack:0 pid:209 tgid:209 ppid:2 >> flags:0x00004000 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> unregister_netdevice_notifier+0x40/0x150 >> netdev_trig_deactivate+0x1f/0x60 [ledtrig_netdev c68f5c964fe428d1a2169816a653c62dba2f2e01] >> led_trigger_set+0x102/0x330 >> led_classdev_unregister+0x4b/0x110 >> release_nodes+0x3d/0xb0 >> devres_release_all+0x8b/0xc0 >> device_del+0x34f/0x3c0 >> unregister_netdevice_many_notify+0x80b/0xaf0 >> unregister_netdev+0x7c/0xd0 >> igc_remove+0xd8/0x1e0 [igc d1bcf7b726f7370e167c72960cdb27ae7f970357] >> pci_device_remove+0x3f/0xb0 >> device_release_driver_internal+0x1be/0x2d0 >> pci_stop_bus_device+0x68/0xa0 >> pci_stop_bus_device+0x39/0xa0 >> pci_stop_bus_device+0x39/0xa0 >> pciehp_unconfigure_device+0x12b/0x1d0 >> pciehp_disable_slot+0x65/0x120 >> pciehp_handle_presence_or_link_change+0x7a/0x450 >> pciehp_ist+0xf5/0x320 >> irq_thread_fn+0x1d/0x40 >> irq_thread+0x19b/0x260 >> kthread+0x147/0x160 >> ret_from_fork+0x34/0x40 >> ret_from_fork_asm+0x11/0x20 >> >> >> Other affected kernel threads >> INFO: task NetworkManager:1294 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:NetworkManager state:D stack:0 pid:1294 tgid:1294 ppid:1 >> flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> ____sys_sendmsg+0x1a5/0x2a0 >> ___sys_sendmsg+0x293/0x2d0 >> __x64_sys_sendmsg+0x10d/0x140 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x7971ac52c02b >> RSP: 002b:00007ffc684c09a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e >> RAX: ffffffffffffffda RBX: 00005661e9bc5be0 RCX: 00007971ac52c02b >> RDX: 0000000000000000 RSI: 00007ffc684c09e0 RDI: 000000000000000d >> RBP: 00007ffc684c09c0 R08: 0000000000000000 R09: 0000000000000001 >> R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000001 >> R13: 0000000000000000 R14: 00005661e9c45030 R15: 00005661e9bc5cac >> >> INFO: task geoclue:2325 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:geoclue state:D stack:0 pid:2325 tgid:2325 ppid:1 >> flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x7ad712b2beea >> RSP: 002b:00007fff94c1fd80 EFLAGS: 00000246 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ad712b2beea >> RDX: 0000000000000014 RSI: 00007fff94c1fe10 RDI: 0000000000000007 >> RBP: 00007fff94c1fdb0 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000004000 R11: 0000000000000246 R12: 00007fff94c1fe10 >> R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000000 >> >> INFO: task pool-geoclue:84396 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:pool-geoclue state:D stack:0 pid:84396 tgid:2325 ppid:1 >> flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x7ad712b2c0e4 >> RSP: 002b:00007ad6e7dfdf40 EFLAGS: 00000293 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ad712b2c0e4 >> RDX: 0000000000000014 RSI: 00007ad6e7dff070 RDI: 000000000000000b >> RBP: 00007ad6e7dfdf80 R08: 00007ad6e7dff014 R09: 000000000000000c >> R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000b >> R13: 0000000000000010 R14: 00007ad6e7dff030 R15: 00000000d3fb1bea >> >> INFO: task Qt bearer threa:4002 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:Qt bearer threa state:D stack:0 pid:4002 tgid:3506 >> ppid:3034 flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x76f3c692beea >> RSP: 002b:000076f3a51fecb0 EFLAGS: 00000246 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000076f3c692beea >> RDX: 0000000000000020 RSI: 000076f3a51fed60 RDI: 0000000000000023 >> RBP: 000076f3a51fece0 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 000076f3a51fee38 >> R13: 000076f378026b30 R14: 000076f3a51fed30 R15: 000076f378026b48 >> >> INFO: task gnome-software:3529 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:gnome-software state:D stack:0 pid:3529 tgid:3529 >> ppid:3034 flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x7d6be892beea >> RSP: 002b:00007ffd94e01560 EFLAGS: 00000246 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007d6be892beea >> RDX: 0000000000000014 RSI: 00007ffd94e015f0 RDI: 000000000000000d >> RBP: 00007ffd94e01590 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000004000 R11: 0000000000000246 R12: 00007ffd94e015f0 >> R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000000 >> >> INFO: task Qt bearer threa:3960 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:Qt bearer threa state:D stack:0 pid:3960 tgid:3550 >> ppid:3034 flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x777a42b2beea >> RSP: 002b:0000777a2abfecf0 EFLAGS: 00000246 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000777a42b2beea >> RDX: 0000000000000020 RSI: 0000777a2abfeda0 RDI: 000000000000001d >> RBP: 0000777a2abfed20 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 0000777a2abfee78 >> R13: 0000777a080285b0 R14: 0000777a2abfed70 R15: 0000777a080285c8 >> >> INFO: task xdg-desktop-por:3821 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:xdg-desktop-por state:D stack:0 pid:3821 tgid:3821 >> ppid:2776 flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x79d76612beea >> RSP: 002b:00007ffd480942a0 EFLAGS: 00000246 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000079d76612beea >> RDX: 0000000000000014 RSI: 00007ffd48094330 RDI: 0000000000000008 >> RBP: 00007ffd480942d0 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000004000 R11: 0000000000000246 R12: 00007ffd48094330 >> R13: 0000000000000014 R14: 0000000000000000 R15: 0000000000000000 >> >> INFO: task DNS Res~ver #11:25588 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:DNS Res~ver #11 state:D stack:0 pid:25588 tgid:4934 >> ppid:3070 flags:0x00000002 >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> netlink_dump+0x1c4/0x3f0 >> __netlink_dump_start+0x2b3/0x340 >> rtnetlink_rcv_msg+0x469/0x4a0 >> netlink_rcv_skb+0xed/0x120 >> netlink_unicast+0x2ce/0x3f0 >> netlink_sendmsg+0x39c/0x450 >> __sys_sendto+0x2c8/0x350 >> __x64_sys_sendto+0x26/0x30 >> do_syscall_64+0x92/0x170 >> entry_SYSCALL_64_after_hwframe+0x46/0x4e >> RIP: 0033:0x72d65892c0e4 >> RSP: 002b:000072d649cbb880 EFLAGS: 00000293 ORIG_RAX: 000000000000002c >> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000072d65892c0e4 >> RDX: 0000000000000014 RSI: 000072d649cbc9b0 RDI: 0000000000000053 >> RBP: 000072d649cbb8c0 R08: 000072d649cbc954 R09: 000000000000000c >> R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000053 >> R13: 0000000000000010 R14: 000072d649cbc970 R15: 00000000b48fd654 >> >> INFO: task kworker/u88:2:31385 blocked for more than 120 seconds. >> Not tainted 6.9.0-rc2 #1 >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. >> task:kworker/u88:2 state:D stack:0 pid:31385 tgid:31385 ppid:2 >> flags:0x00004000 >> Workqueue: ipv6_addrconf addrconf_verify_work >> Call Trace: >> >> __schedule+0x5dd/0x1380 >> schedule+0x6e/0xf0 >> schedule_preempt_disabled+0x15/0x20 >> __mutex_lock+0x2a0/0x750 >> addrconf_verify_work+0x20/0x30 >> process_scheduled_works+0x1f4/0x450 >> worker_thread+0x349/0x5e0 >> kthread+0x147/0x160 >> ret_from_fork+0x34/0x40 >> ret_from_fork_asm+0x11/0x20 >> > It's unfortunate that the device-managed LED is bound to the netdev device. Wouldn't binding it to the parent (&pdev->dev) solve the issue?