From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 B668415539A for ; Mon, 29 Jul 2024 15:23:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722266606; cv=none; b=NKADDe7fDBDcSY6VzCLeuPZ164uQNO5THdvjo1JZ+KvxIBc2u9BYk6/Uwo7uBC+YiJ/iOHNxAkluYx8/aKYipwUpWUzi1JRZBXwJy1JmUHVASwmsKkrlt9pYjw3CGsLL0Pi4wQxWqTj5G/c+WRR/2UPCwkYrXp3XA91at0WejBU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722266606; c=relaxed/simple; bh=qYomeXMkVFuXrgdGSB8/1iMUmIyedm6/4wkFQU+rvMM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=MwZaJmTvC+51RN54ZW83dlN0v/TNz913lsUA98V2CttWvvZqkj44clQWhegYj/zZkFs9T0NoLzuHW4HDof+aa80oqKgMvYLVqPm1Nv4RExfgDCIspd+ipGf8cjZDwNt5DrCU+ufnmLSceHF72ldOtg3g+Ah/mO0zM8IsfdsGhAA= 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=209.85.166.71 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-io1-f71.google.com with SMTP id ca18e2360f4ac-81fa44764bbso239636339f.3 for ; Mon, 29 Jul 2024 08:23:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722266604; x=1722871404; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ug6pUn7w8BPfCU3F0BD0f8l6pYsg9PaPyBynog0myRk=; b=UbJC1fS+6ouoMYTIY5pCiFhKtdIg5ghdtaLfBWP+2vQ06bDcXVnVs6Zspaaf6QJxoE ee29SZ9oj3xMkTl1/dfJRtUcGyKVzdN0fFeisQFGifj8P7y7upXkqQVXpqOvvCH1wBGA T9B70ZeyO2SOlQFUSR0im8TuOV+a4xyX8L4BH4zDssQ47TdwK32lU9b4UmJFLU7ctmhC 03Dkj6ksMs1Id2YTInFvDCbl5stXyMGzVpaquP16Je37NikS4oomTCfF7KNTVqBNr1fh 5HEvGhm1Eyf+DZ6jHNdA0cyoz1BEBNQfisvhMjK7pPSapaJesf+kn2mxFV+NH1JOk1Rr T0ZA== X-Forwarded-Encrypted: i=1; AJvYcCXkVUOz1FxbrebzQXaJ/+zLVA6U5qICuJcM1Qms+tVkSv4gIKY3SHApTf6xck9Sqs7mBG8aqJkhpDKngYANF5g95RaScXms X-Gm-Message-State: AOJu0YytK02HJYanFnSSaUyteYRI7lqipGIZ2VZ2T5qVniMhv96O799b rEtkZPorXUnD/tZuGRGHSeoYrsql43niR0waYP2jC7yL2dF07KuUBRhUjeZzrUPSC+T1kdujTgU nbMkXP5Vv7kskiI3obhRr34McbqhaEYL1Q8Yd1zknofhTK7SIz7GVh9c= X-Google-Smtp-Source: AGHT+IFrRIj/C3ns4WiWQ7hSHn7roIVoQmhlw74yzJcq7hLTEbmG5h/INNA8BTlF5kIDTscFN5JlrUDfbgpQS/9Uo57Ffbqn76qP Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:264f:b0:4c2:8e08:f579 with SMTP id 8926c6da1cb9f-4c63f1e9e23mr360973173.2.1722266603795; Mon, 29 Jul 2024 08:23:23 -0700 (PDT) Date: Mon, 29 Jul 2024 08:23:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000020c8d0061e647124@google.com> Subject: [syzbot] [net?] INFO: task hung in addrconf_dad_work (5) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, 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" Hello, syzbot found the following issue on: HEAD commit: dc1c8034e31b minmax: simplify min()/max()/clamp() implemen.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=135baf03980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b0cca2f3880513d dashboard link: https://syzkaller.appspot.com/bug?extid=82ccd564344eeaa5427d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/29a310f3ad21/disk-dc1c8034.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4d35d3afb396/vmlinux-dc1c8034.xz kernel image: https://storage.googleapis.com/syzbot-assets/ed329ce5166e/bzImage-dc1c8034.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+82ccd564344eeaa5427d@syzkaller.appspotmail.com INFO: task kworker/u8:2:35 blocked for more than 143 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:2 state:D stack:20272 pid:35 tgid:35 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task dhcpcd:4884 blocked for more than 144 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:21632 pid:4884 tgid:4884 ppid:1 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:35 [inline] genl_op_lock net/netlink/genetlink.c:60 [inline] genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f2/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 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: 0033:0x7fa250dd6a4b RSP: 002b:00007fff5e4c9d68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00005616070a494f RCX: 00007fa250dd6a4b RDX: 0000000000000000 RSI: 00007fff5e4c9db0 RDI: 0000000000000010 RBP: 00007fff5e4ce8a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010 R13: 00007fff5e4cde10 R14: 0000000000000000 R15: 0000561624964ba0 INFO: task kworker/1:11:6096 blocked for more than 146 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:11 state:D stack:19768 pid:6096 tgid:6096 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:276 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task kworker/1:0:9989 blocked for more than 148 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:21208 pid:9989 tgid:9989 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz-executor:12923 blocked for more than 149 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20992 pid:12923 tgid:12923 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f2/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 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: 0033:0x7f365877902c RSP: 002b:00007ffd4ffb8c30 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f3659434620 RCX: 00007f365877902c RDX: 0000000000000020 RSI: 00007f3659434670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd4ffb8c84 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f3659434670 R15: 0000000000000000 INFO: task syz-executor:13157 blocked for more than 151 seconds. Not tainted 6.11.0-rc1-syzkaller-00004-gdc1c8034e31b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:19152 pid:13157 tgid:13157 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x1800/0x4a60 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb16/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f2/0x990 net/netlink/af_netlink.c:1357 --- 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 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