INFO: task kworker/0:2:8 blocked for more than 143 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:26256 pid: 8 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 linkwatch_event+0x5/0x50 net/core/link_watch.c:250 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/1:4:4840 blocked for more than 143 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:27376 pid: 4840 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 addrconf_dad_work+0x9f/0x10f0 net/ipv6/addrconf.c:4031 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task kworker/0:6:8662 blocked for more than 143 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:6 state:D stack:27400 pid: 8662 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 addrconf_dad_work+0x9f/0x10f0 net/ipv6/addrconf.c:4031 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.1:8799 blocked for more than 144 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24208 pid: 8799 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007fff240d7c30 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004193ec RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff240d7c84 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:8801 blocked for more than 144 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:24320 pid: 8801 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007ffc3d523990 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004193ec RDX: 0000000000000040 RSI: 00000000014a4370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc3d5239e4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.3:8804 blocked for more than 145 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24256 pid: 8804 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007fff767e4500 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004193ec RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff767e4554 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.5:8806 blocked for more than 145 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24296 pid: 8806 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007fffd46bab00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004193ec RDX: 000000000000002c RSI: 00000000014a4370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fffd46bab54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.4:8807 blocked for more than 145 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24312 pid: 8807 ppid: 1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007ffec320f7a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004193ec RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffec320f7f4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.0:10122 blocked for more than 146 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27696 pid:10122 ppid: 8800 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 nl80211_pre_doit+0x1d/0x480 net/wireless/nl80211.c:14805 genl_family_rcv_msg_doit+0x1bc/0x2f0 net/netlink/genetlink.c:734 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 __sys_sendto+0x1a4/0x270 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xd8/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4193ec RSP: 002b:00007f48f4f35f80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f48f4f360f0 RCX: 00000000004193ec RDX: 0000000000000024 RSI: 00007f48f4f36140 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f48f4f35fd4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f48f4f36140 R14: 0000000000000005 R15: 0000000000000000 INFO: task syz-executor.0:10126 blocked for more than 146 seconds. Not tainted 5.12.0-rc8-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28136 pid:10126 ppid: 8800 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4322 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5073 schedule+0xcf/0x270 kernel/sched/core.c:5152 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211 __mutex_lock_common kernel/locking/mutex.c:1026 [inline] __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096 nl80211_pre_doit+0x1d/0x480 net/wireless/nl80211.c:14805 genl_family_rcv_msg_doit+0x1bc/0x2f0 net/netlink/genetlink.c:734 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2502 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2350 ___sys_sendmsg+0xd3/0x150 net/socket.c:2404 __sys_sendmsg+0xb2/0x140 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x466459 RSP: 002b:00007f48f4ef5188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000466459 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffe53db7eaf R14: 00007f48f4ef5300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/0:0/5: #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88800ec65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2246 #1: ffffc90000ca7db0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2250 #2: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x74/0xa30 net/wireless/reg.c:2416 2 locks held by kworker/0:1/7: #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2246 #1: ffff8880ba01f948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 3 locks held by kworker/0:2/8: #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88800ec64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2246 #1: ffffc90000cd7db0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2250 #2: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x50 net/core/link_watch.c:250 2 locks held by kworker/u4:5/525: #0: ffff8880ba135118 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1321 [inline] #0: ffff8880ba135118 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x21c/0x2170 kernel/sched/core.c:4990 #1: ffff8880ba11f948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 1 lock held by khungtaskd/1612: #0: ffffffff8a76af80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6328 3 locks held by kworker/1:4/4840: #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2246 #1: ffffc90000eefdb0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2250 #2: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x10f0 net/ipv6/addrconf.c:4031 1 lock held by in:imklog/8075: #0: ffff8880163e2370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:974 3 locks held by kworker/0:6/8662: #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88801f930138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2246 #1: ffffc900021a7db0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2250 #2: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x10f0 net/ipv6/addrconf.c:4031 1 lock held by syz-executor.1/8799: #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 1 lock held by syz-executor.2/8801: #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 1 lock held by syz-executor.3/8804: #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 1 lock held by syz-executor.5/8806: #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 1 lock held by syz-executor.4/8807: #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 2 locks held by syz-executor.0/10122: #0: ffffffff8be3b930 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:810 #1: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x1d/0x480 net/wireless/nl80211.c:14805 4 locks held by syz-executor.0/10125: 2 locks held by syz-executor.0/10126: #0: ffffffff8be3b930 (cb_lock){++++}-{3:3}, at: genl_rcv+0x10/0x30 net/netlink/genetlink.c:810 #1: ffffffff8bdb1d48 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0x1d/0x480 net/wireless/nl80211.c:14805 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1612 Comm: khungtaskd Not tainted 5.12.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa5/0xe6 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 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+0x956/0xc30 kernel/hung_task.c:294 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 525 Comm: kworker/u4:5 Not tainted 5.12.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_acquire+0x0/0x740 kernel/locking/lockdep.c:5479 Code: 22 51 00 e9 fc fd ff ff 48 c7 c7 c8 dc 35 8c e8 46 22 51 00 e9 a5 fe ff ff 48 c7 c7 c8 dc 35 8c e8 35 22 51 00 e9 fb fe ff ff <48> b8 00 00 00 00 00 fc ff df 41 57 41 89 d7 41 56 41 89 f6 41 55 RSP: 0018:ffffc9000297fc00 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888017673158 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880191c8ad8 RBP: ffff8880191c8ac0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff87e1bb00 R13: ffff8880191c8ac0 R14: ffff88802b3ecc00 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feb69022000 CR3: 000000003e3f4000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] batadv_nc_purge_paths+0xc0/0x2d0 net/batman-adv/network-coding.c:438 batadv_nc_worker+0x6b9/0xcc0 net/batman-adv/network-coding.c:718 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294