From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (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 AA27D15D5C1 for ; Sun, 6 Oct 2024 21:38:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728250705; cv=none; b=VyI/2iDHCHrsGsFZkFcSCsZtJjbvqB/haq0+cvZ/7cn8pnEdecedSxe+GqDIb1sOj8asXEu6dHgoPVdohIjoVX2sfY6npKuKgsjdaj+4rS1alIoISd/WJjaQiqZvTF4S8fo5AVoqNK5JhCgsu3qKZGGLlfPoE6G6wuuxP9wVkGM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728250705; c=relaxed/simple; bh=CY8wDAFU6U/UmQl4YTxJ8N8joDeaC8OHUz4aYJWLXM8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=dmPDmoi/7iDon5VyWK1HpQapl23ENGzdwxGNNWOjb1SI5i4+IbOiK7Q9x30kIhet43o2t9QwfoZLIkpM8YhNPt52z9hB0y6lZpUcE8NEmMY/2d0DwQSGT8IG49jcRp8sN50EaF/ey4+juvi5ofc9yAz4AiILCNNFDWa+fNJhUhU= 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=209.85.166.197 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-f197.google.com with SMTP id e9e14a558f8ab-3a2762bfcbbso64843835ab.3 for ; Sun, 06 Oct 2024 14:38:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728250703; x=1728855503; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oi8HXwVoGMWmKJ99ATvsuDSStDmlC32JS4dpqckZqhk=; b=MeFGr+0ojjbEtjejAbHyO0Z/E4QDfPD1gBa5I5Gx0TmPBqtdS+D16VMZ/yhCTATOyZ K7DltHA69HxyDZIRveXrsmZok0IhjJtSa9kdOIOxO8PHw3QFG4SY5RA2gQL+4owWX1Sp pHIWSUPxOWjHxTuwSKei+ZAqaKPvWDSBrdkc8aAqeAqFGWSaewNBKMnkFvltcOYUqZju Z+uYlcIcIEMVj5i6rOahANUMB0iVrL0vhHNPAiIL1aCXsxrqgz/9TW+mgrVM5dNT2joF TDzoQHt0M8JcWZKsB9tXjK3ErlISzTdrprjS978hiCKWz3vj1rTnMpbO0o66kbmTpfS5 zqtg== X-Forwarded-Encrypted: i=1; AJvYcCUEXYhSQL28NbeYOgJSS7seb0XO4u6J6nvcad84MvbEuU98m/PegurAYIdAFshFQ39Tq3Dn9mscni+Tz1A=@vger.kernel.org X-Gm-Message-State: AOJu0YzZQuQbrIdU0yMqishBO88Qkcy1hoPBUxgHE1F9w4f9henI4dKR Atla7ORMTdjpxhvPpWEBLdcF6WURAEJAI66E2jNXFWjwWbcovx/JDlysEOpX6zJEYFVF6F2u0j3 s50yspUZn3Cq2MhR1bQ0pDILEfpiF9o92tGIPKMsvyp0HwC+e+fvqzXk= X-Google-Smtp-Source: AGHT+IFrv3dWZzOVoApIIE1kw9yRu1PADtpFNJmZaD7sXaDBeRVrCwWDvkIYFIgbyjfzvFGwT+UsPPpZCzQ8ZxGwLtBko48ZI3h/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c26e:0:b0:39f:93a7:e788 with SMTP id e9e14a558f8ab-3a3759780efmr86855765ab.2.1728250702839; Sun, 06 Oct 2024 14:38:22 -0700 (PDT) Date: Sun, 06 Oct 2024 14:38:22 -0700 In-Reply-To: <000000000000ef73a7061f328276@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6703034e.050a0220.49194.04e5.GAE@google.com> Subject: Re: [syzbot] [net?] INFO: task hung in switchdev_deferred_process_work (3) From: syzbot To: davem@davemloft.net, edumazet@google.com, ivecera@redhat.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 8f602276d390 Merge tag 'bcachefs-2024-10-05' of git://evil.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14199b80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ba92623fdea824c9 dashboard link: https://syzkaller.appspot.com/bug?extid=d6bbe0f5705cb8a5aa2b compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10ea8327980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/147c6aceaf24/disk-8f602276.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a61d9ce38120/vmlinux-8f602276.xz kernel image: https://storage.googleapis.com/syzbot-assets/4ffc70f580e6/bzImage-8f602276.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d6bbe0f5705cb8a5aa2b@syzkaller.appspotmail.com INFO: task kworker/0:0:8 blocked for more than 150 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:21392 pid:8 tgid:8 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/u8:0:11 blocked for more than 154 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:0 state:D stack:17144 pid:11 tgid:11 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4196 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/u8:5:928 blocked for more than 155 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:5 state:D stack:22352 pid:928 tgid:928 ppid:2 flags:0x00004000 Workqueue: events_unbound linkwatch_event Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:276 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz-executor:5329 blocked for more than 156 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21728 pid:5329 tgid:5329 ppid:5324 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773 __nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1425 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline] nsim_dev_reload_destroy+0x28a/0x490 drivers/net/netdevsim/dev.c:1658 nsim_drv_remove+0x58/0x160 drivers/net/netdevsim/dev.c:1673 device_remove drivers/base/dd.c:567 [inline] __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x4a9/0x7c0 drivers/base/dd.c:1296 bus_remove_device+0x34f/0x420 drivers/base/bus.c:576 device_del+0x57a/0x9b0 drivers/base/core.c:3864 device_unregister+0x20/0xc0 drivers/base/core.c:3905 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline] del_device_store+0x363/0x480 drivers/net/netdevsim/bus.c:226 kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdc0217cadf RSP: 002b:00007fdc0245f220 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fdc0217cadf RDX: 0000000000000001 RSI: 00007fdc0245f270 RDI: 0000000000000005 RBP: 00007fdc021f13ae R08: 0000000000000000 R09: 00007fdc0245f077 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007fdc0245f270 R14: 00007fdc02e64620 R15: 0000000000000003 INFO: task syz-executor:5341 blocked for more than 159 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:19824 pid:5341 tgid:5341 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba4d57cadf RSP: 002b:00007fba4d85f220 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fba4d57cadf RDX: 0000000000000001 RSI: 00007fba4d85f270 RDI: 0000000000000005 RBP: 00007fba4d5f13ae R08: 0000000000000000 R09: 00007fba4d85f077 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007fba4d85f270 R14: 00007fba4e264620 R15: 0000000000000003 INFO: task syz-executor:5344 blocked for more than 160 seconds. Not tainted 6.12.0-rc1-syzkaller-00349-g8f602276d390 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20912 pid:5344 tgid:5344 ppid:5330 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6767 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6824 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216 kernfs_fop_write_iter+0x3a0/0x500 fs/kernfs/file.c:334 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xa6d/0xc90 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4619b7cadf RSP: 002b:00007f4619e5f220 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f4619b7cadf RDX: 0000000000000001 RSI: 00007f4619e5f270 RDI: 0000000000000005 RBP: 00007f4619bf13ae R08: 0000000000000000 R09: 00007f4619e5f077 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001 R13: 00007f4619e5f270 R14: 00007f461a864620 R15: 0000000000000003 --- 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.