INFO: task syz-executor:21083 blocked  for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26864 pid:21083 tgid:21083 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x153e/0x5070
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 inet_rtm_newaddr+0x404/0x1ad0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
 netlink_unicast+0x80f/0x9b0
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x18f/0x1d0
 __sys_sendto+0x3ff/0x590
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8325d5b58e
RSP: 002b:00007fffb6291358 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000055558105b500 RCX: 00007f8325d5b58e
RDX: 0000000000000028 RSI: 00007f8326b44670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fffb62913d4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f8326b44670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:21087 blocked  for more than 146 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26304 pid:21087 tgid:21087 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x153e/0x5070
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 inet_rtm_newaddr+0x404/0x1ad0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
 netlink_unicast+0x80f/0x9b0
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x18f/0x1d0
 __sys_sendto+0x3ff/0x590
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ee4f5b58e
RSP: 002b:00007ffee70a4338 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000555568601500 RCX: 00007f7ee4f5b58e
RDX: 0000000000000028 RSI: 00007f7ee5d44670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffee70a43b4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f7ee5d44670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/10:
 #0: ffff88810006b548 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc900000f7c40 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffffffff8e5663b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by khungtaskd/35:
 #0: ffffffff8e560120 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u11:0/55:
 #0: ffff888113e9a148 ((wq_completion)hci10#2){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90000bf7c40 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff88811df780c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x950
 #3: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x54c/0x950
1 lock held by dhcpcd/5551:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x65f/0xe30
2 locks held by getty/5634:
 #0: ffff8881123b90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900035732f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
4 locks held by kworker/u11:3/5815:
 #0: ffff88810a922948 ((wq_completion)hci11#2){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc900049efc40 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff88811eadc0c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x950
 #3: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x54c/0x950
3 locks held by kworker/0:7/13044:
 #0: ffff88810006a148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90003fefc40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0xa5/0xfe0
3 locks held by kworker/0:8/13045:
 #0: ffff88810006b548 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90003fdfc40 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
5 locks held by kworker/u11:4/16665:
 #0: ffff88810b784148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90009477c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff888114950ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881149500c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x8a3/0xed0
 #4: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
5 locks held by kworker/u11:6/16673:
 #0: ffff8881a83c0948 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc900094b7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff888197224ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881972240c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x8a3/0xed0
 #4: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
5 locks held by kworker/u11:7/16694:
 #0: ffff8881093d5948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90009487c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff888111f8cec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff888111f8c0c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x8a3/0xed0
 #4: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
3 locks held by kworker/u8:6/16696:
 #0: ffff888111bac948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc90009657c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
4 locks held by kworker/u11:8/16704:
 #0: ffff88810c193148 ((wq_completion)hci9#2){+.+.}-{0:0}, at: process_one_work+0x855/0x1650
 #1: ffffc9000247fc40 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650
 #2: ffff8881127280c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x950
 #3: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x54c/0x950
4 locks held by syz-executor/17074:
 #0: ffff8881bac0cec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x5a0
 #1: ffff8881bac0c0c0 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x640/0x10e0
 #2: ffffffff8fb505c8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x260
 #3: ffff8881994bd2f8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x7b/0x5c0
3 locks held by syz.3.3938/21052:
2 locks held by syz.9.3946/21079:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
 #1: ffffffff8e5663b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by syz-executor/21083:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21087:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21090:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21095:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21100:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21103:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by dhcpcd/21108:
 #0: ffff888171182608 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by dhcpcd/21109:
 #0: ffff888171183808 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by dhcpcd/21110:
 #0: ffff888171185008 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by dhcpcd/21111:
 #0: ffff888171187a08 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by dhcpcd/21112:
 #0: ffff8881a6090808 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by dhcpcd/21113:
 #0: ffff8881a6096808 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: __sock_release+0x89/0x250
1 lock held by syz-executor/21115:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21120:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/21123:
 #0: ffffffff8f9c3d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0x103d/0x1090
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 21052 Comm: syz.3.3938 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc 89 f6 31 d2 e9 36 3e 6a 03 66 0f 1f 44 00
RSP: 0018:ffffc90000a08698 EFLAGS: 00000046
RAX: 00000000000000d2 RBX: ffff88823c623e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 00000000000000d2 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81b13c55 R09: ffffffff9a075508
R10: 0000000000000003 R11: ffffffff81730750 R12: 0000000010004d2c
R13: dffffc0000000000 R14: 00000000000000d2 R15: 0000000000000020
FS:  0000555583e9e500(0000) GS:ffff8882a96a4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3f113546c0 CR3: 000000016c212000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1c9/0x350
 hrtimer_interrupt+0x620/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x460
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__unwind_start+0x592/0x760
Code: 0f 92 c2 20 ca 80 fa 01 75 3e 48 8b 54 24 20 4c 39 e2 0f 97 c1 48 39 c2 0f 96 c0 20 c8 3c 01 75 27 48 8b 44 24 08 80 3c 30 00 <4c> 8b 64 24 18 74 08 4c 89 e7 e8 0f 65 b6 00 48 8b 44 24 10 49 39
RSP: 0018:ffffc90000a08908 EFLAGS: 00000246
RAX: 1ffff92000141134 RBX: ffffc90000a08968 RCX: 0000000000000101
RDX: ffffc90000a089f8 RSI: dffffc0000000000 RDI: ffff8881bb0b1d00
RBP: 1ffff9200014112e R08: ffffc90000a089f0 R09: 0000000000000000
R10: ffffc90000a089b8 R11: fffff52000141139 R12: ffffc90000a01000
R13: ffffc90000a08978 R14: 1ffff9200014112f R15: ffffc90000a08970
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 __rcu_free_sheaf_prepare+0x129/0x290
 rcu_free_sheaf+0x31/0x200
 rcu_core+0x7cd/0x1070
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x245/0x920
Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 85 ca fc 09 e8 20 85 37 00 fb 4c 8b 65 c0 <49> 8d bc 24 30 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000700f2f8 EFLAGS: 00000206
RAX: 000000000045f511 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dcf1fb8 RDI: ffffffff8c076d00
RBP: ffffc9000700f350 R08: ffffffff8ff0e0b7 R09: 1ffffffff1fe1c16
R10: dffffc0000000000 R11: fffffbfff1fe1c17 R12: ffff8881bb0b1d00
R13: dffffc0000000000 R14: ffff8881af2b5700 R15: ffff88823c63b918
 __schedule+0x1546/0x5070
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x599/0x620
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x2d7/0x3d0
Code: 64 57 11 00 00 00 00 eb b5 e8 95 a1 ed 09 f7 c3 00 02 00 00 74 b9 65 48 8b 05 15 1f 57 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 62 92 53
RSP: 0018:ffffc9000700f680 EFLAGS: 00000282
RAX: b99652cdd5f84a00 RBX: 0000000000000202 RCX: 0000000000000046
RDX: 0000000000000001 RSI: ffffffff8df5fbb5 RDI: ffffffff8c076d00
RBP: ffff8881bb0b2840 R08: ffffc9000700fd30 R09: 0000000000000000
R10: ffffc9000700f7d8 R11: fffff52000e01efd R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e560120 R15: ffff8881bb0b1d00
 unwind_next_frame+0x1aaa/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c1/0x630
 security_sk_free+0xa4/0x180
 __sk_destruct+0x5dd/0x880
 unix_release_sock+0xa3e/0xc80
 unix_release+0x92/0xd0
 __sock_release+0xb9/0x250
 sock_close+0x1c/0x30
 __fput+0x44f/0xa70
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f619ad9acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed702b8d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffed702b9c0 RCX: 00007f619ad9acb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000afbb2 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2fd20000 R11: 0000000000000246 R12: 00007ffed702ba00
R13: 00007f619b015fac R14: 00000000000b0a95 R15: 00007f619b015fa0
 </TASK>
