INFO: task kworker/1:1:36 blocked for more than 143 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:26672 pid: 36 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.3:1719 blocked for more than 143 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26032 pid: 1719 ppid: 6860 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.2:1731 blocked for more than 143 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26608 pid: 1731 ppid: 6856 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.2:1745 blocked for more than 144 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28736 pid: 1745 ppid: 6856 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.1:1729 blocked for more than 144 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28736 pid: 1729 ppid: 6858 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.0:1734 blocked for more than 145 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28736 pid: 1734 ppid: 6854 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.5:1736 blocked for more than 145 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28736 pid: 1736 ppid: 6861 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.4:1737 blocked for more than 146 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28736 pid: 1737 ppid: 6852 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 INFO: task syz-executor.4:1753 blocked for more than 146 seconds. Not tainted 5.9.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28736 pid: 1753 ppid: 6852 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3778 [inline] __schedule+0x9b9/0xd20 kernel/sched/core.c:4527 Showing all locks held in the system: 3 locks held by kworker/1:1/36: #0: ffff888214de8938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2242 #1: ffffc90000ea7d80 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2244 #2: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4568 1 lock held by khungtaskd/1169: #0: ffffffff894fe510 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/6512: #0: ffff888091ecf8f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x253/0x2f0 fs/file.c:930 1 lock held by syz-executor.3/1719: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: load_metaops_and_vet net/sched/act_ife.c:277 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: populate_metalist net/sched/act_ife.c:452 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: tcf_ife_init+0xbeb/0x1600 net/sched/act_ife.c:578 2 locks held by syz-executor.2/1724: 1 lock held by syz-executor.2/1731: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: load_metaops_and_vet net/sched/act_ife.c:277 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: populate_metalist net/sched/act_ife.c:452 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: tcf_ife_init+0xbeb/0x1600 net/sched/act_ife.c:578 1 lock held by syz-executor.2/1745: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 1 lock held by syz-executor.1/1729: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 1 lock held by syz-executor.0/1734: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 1 lock held by syz-executor.5/1736: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 1 lock held by syz-executor.4/1737: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 1 lock held by syz-executor.4/1753: #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff897d5c28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83c/0xd40 net/core/rtnetlink.c:5560 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1169 Comm: khungtaskd Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d6/0x29e lib/dump_stack.c:118 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd65/0xdb0 kernel/hung_task.c:295 kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1724 Comm: syz-executor.2 Not tainted 5.9.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__clear_buddies_next kernel/sched/fair.c:4263 [inline] RIP: 0010:clear_buddies kernel/sched/fair.c:4287 [inline] RIP: 0010:pick_next_entity+0x470/0xab0 kernel/sched/fair.c:4476 Code: 74 77 48 8d ab 50 01 00 00 48 89 e8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 ef e8 8b 87 61 00 48 8b 6d 00 48 83 c5 48 49 89 ef <49> c1 ef 03 43 80 3c 2f 00 74 08 48 89 ef e8 6d 87 61 00 48 39 5d RSP: 0018:ffffc90002686de0 EFLAGS: 00000082 RAX: 1ffff11015346c8a RBX: ffff8880a9a36300 RCX: dffffc0000000000 RDX: ffffc90002686f08 RSI: ffff888097ce03c0 RDI: ffff8880ae835980 RBP: ffff8880ae8359c8 R08: ffffffff839d7bc7 R09: fffffbfff131e296 R10: fffffbfff131e296 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880a9a36300 R15: ffff8880ae8359c8 FS: 00007f1e01adb700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e55820000 CR3: 00000000a7ce3000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pick_next_task_fair+0x1bb/0x970 kernel/sched/fair.c:7028 pick_next_task kernel/sched/core.c:4344 [inline] __schedule+0x422/0xd20 kernel/sched/core.c:4495 preempt_schedule_irq+0xda/0x190 kernel/sched/core.c:4785 irqentry_exit_cond_resched kernel/entry/common.c:333 [inline] irqentry_exit+0x92/0xa0 kernel/entry/common.c:363 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:arch_local_irq_restore+0x3a/0x50 arch/x86/include/asm/paravirt.h:770 Code: b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 b8 17 4d 89 e8 65 48 5b 00 48 83 3d d5 8b f3 07 00 74 0c 48 89 df 57 9d <0f> 1f 44 00 00 5b c3 0f 0b 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc90002687048 EFLAGS: 00000286 RAX: 1ffffffff129a2f7 RBX: 0000000000000286 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff894fe538 RDI: 0000000000000286 RBP: 0000000000000000 R08: ffffffff86925b54 R09: 0000000000000000 R10: ffffed1013e4f341 R11: 0000000000000000 R12: ffff888097ce0340 R13: ffffffff894fe538 R14: 00000000ffffffff R15: 0000000000000286 lock_is_held_type+0xb3/0xe0 kernel/locking/lockdep.c:5047 lock_is_held include/linux/lockdep.h:267 [inline] ___might_sleep+0x3d/0x570 kernel/sched/core.c:7265 __mutex_lock_common+0x50/0x2fc0 kernel/locking/mutex.c:935 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 tcf_idr_check_alloc+0xa4/0x380 net/sched/act_api.c:508 tcf_ife_init+0x268/0x1600 net/sched/act_ife.c:513 tcf_action_init_1+0x7dc/0xce0 net/sched/act_api.c:984 tcf_action_init+0x114/0x3d0 net/sched/act_api.c:1043 tcf_action_add net/sched/act_api.c:1451 [inline] tc_ctl_action+0x2c7/0x7e0 net/sched/act_api.c:1504 rtnetlink_rcv_msg+0x889/0xd40 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0xa57/0xd70 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x2b1/0x360 net/socket.c:2440 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1e01adac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002cec0 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffe5cbd601f R14: 00007f1e01adb9c0 R15: 000000000118cf4c