syzbot

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=7994/1/0x4000000000000000 softirq=89492/89498 fqs=1
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P18755/1:b..l
rcu: 	(detected by 1, t=10506 jiffies, g=60201, q=51 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18760 Comm: syz.5.2872 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_preemption_disabled+0xf/0xe0 lib/smp_processor_id.c:16
Code: 0f 0b 90 e9 53 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 05 6c 49 08 <65> 8b 05 fa 6b 49 08 a9 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b 5d
RSP: 0018:ffffc90000007d50 EFLAGS: 00000086
RAX: 0000000000010001 RBX: 0000000000000000 RCX: ffffffff89995791
RDX: ffff888079fc4880 RSI: ffffffff8c1573e0 RDI: ffffffff8c157420
RBP: ffff8880314e3c00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 186202ecd4000000
R13: 186202ecd4000000 R14: 0000000000000002 R15: ffff88805686b410
FS:  00007f6f1d94f6c0(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eff7ff8 CR3: 0000000023722000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:745
 rcu_read_unlock include/linux/rcupdate.h:869 [inline]
 advance_sched+0x8bc/0xc80 net/sched/sch_taprio.c:987
 __run_hrtimer kernel/time/hrtimer.c:1761 [inline]
 __hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
Code: 00 e8 c2 59 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 70 84 20 00 48 85 db 0f 85 55 01 00 00 e8 f2 88 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 b7 dc 85
RSP: 0018:ffffc90003ddec28 EFLAGS: 00000287
RAX: ffffffff8f2e8118 RBX: 0000000000000000 RCX: ffffc900201b5000
RDX: 0000000000080000 RSI: ffffffff819b5f7e RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8f2e8118
R13: ffffffff8f2e80c0 R14: ffffc90003ddecb8 R15: dffffc0000000000
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
 vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
 _printk+0xc7/0x100 kernel/printk/printk.c:2475
 __nla_validate_parse+0x751/0x2880 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 nla_parse_nested_deprecated include/net/netlink.h:1365 [inline]
 ctnetlink_parse_tuple_ip net/netfilter/nf_conntrack_netlink.c:1354 [inline]
 ctnetlink_parse_tuple_filter+0x31f/0xa30 net/netfilter/nf_conntrack_netlink.c:1490
 ctnetlink_alloc_filter+0x777/0xaf0 net/netfilter/nf_conntrack_netlink.c:1037
 ctnetlink_start+0xd4/0x200 net/netfilter/nf_conntrack_netlink.c:1082
 __netlink_dump_start+0x60b/0x990 net/netlink/af_netlink.c:2433
 netlink_dump_start include/linux/netlink.h:341 [inline]
 ctnetlink_get_conntrack+0x608/0x7d0 net/netfilter/nf_conntrack_netlink.c:1690
 nfnetlink_rcv_msg+0x9f9/0x1200 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
 nfnetlink_rcv+0x1b3/0x430 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x58a/0x850 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
 __sys_sendmsg+0x16d/0x220 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f1cb8e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6f1d94f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6f1cdb6240 RCX: 00007f6f1cb8e9a9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 000000000000000c
RBP: 00007f6f1cc10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6f1cdb6240 R15: 00007fff60581368
 </TASK>
task:syz.5.2872      state:R  running task     stack:26128 pid:18755 tgid:18752 ppid:13292  task_flags:0x400040 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x116a/0x5dd0 kernel/sched/core.c:6786
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6966
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 wp_page_copy mm/memory.c:3670 [inline]
 do_wp_page+0x177b/0x4f20 mm/memory.c:4030
 handle_pte_fault mm/memory.c:6085 [inline]
 __handle_mm_fault+0x2223/0x5490 mm/memory.c:6212
 handle_mm_fault+0x589/0xd10 mm/memory.c:6381
 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_nocheck_4+0x3/0x10 arch/x86/lib/putuser.S:104
Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 01 cb <89> 01 31 c9 0f 01 ca e9 11 5b 03 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900052379f8 EFLAGS: 00050246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000200000073030
RDX: 0000000000080000 RSI: ffffffff8954d063 RDI: 0000000000000005
RBP: ffffc90005237d98 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000000
R13: 0000200000073000 R14: ffffc90005237ddc R15: 0000000000000002
 ____sys_recvmsg+0x2ee/0x6b0 net/socket.c:2799
 ___sys_recvmsg+0x114/0x1a0 net/socket.c:2828
 do_recvmmsg+0x2fe/0x750 net/socket.c:2923
 __sys_recvmmsg net/socket.c:2997 [inline]
 __do_sys_recvmmsg net/socket.c:3020 [inline]
 __se_sys_recvmmsg net/socket.c:3013 [inline]
 __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3013
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f1cb8e9a9
RSP: 002b:00007f6f1d991038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6f1cdb6080 RCX: 00007f6f1cb8e9a9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f6f1cc10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6f1cdb6080 R15: 00007fff60581368
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g60201 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27368 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x116a/0x5dd0 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6879
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2256
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 5945 Comm: kworker/1:5 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events fqdir_free_fn
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x1f4/0x6b0 kernel/smp.c:679
Code: 00 00 00 66 44 89 ac 24 ce 00 00 00 48 89 de e8 82 fa ff ff 41 89 c5 0f 1f 44 00 00 e8 25 00 0c 00 eb 07 e8 1e 00 0c 00 f3 90 <8b> 9c 24 c8 00 00 00 31 ff 83 e3 01 89 de e8 49 fb 0b 00 85 db 75
RSP: 0018:ffffc900052e7a40 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81afe867
RDX: ffff88801f7f0000 RSI: ffffffff81afe852 RDI: 0000000000000005
RBP: ffffc900052e7b98 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff92000a5cf50
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124820000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa005d1d58 CR3: 000000006d691000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rcu_barrier kernel/rcu/tree.c:3838 [inline]
 rcu_barrier+0x28d/0x6e0 kernel/rcu/tree.c:3775
 fqdir_free_fn+0x32/0x130 net/ipv4/inet_fragment.c:166
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/1:5:5945]
Modules linked in:
irq event stamp: 6893906
hardirqs last  enabled at (6893905): [<ffffffff8b86884b>] irqentry_exit+0x3b/0x90 kernel/entry/common.c:310
hardirqs last disabled at (6893906): [<ffffffff8b86726e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050
softirqs last  enabled at (6893900): [<ffffffff817ceeae>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (6893900): [<ffffffff817ceeae>] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607
softirqs last disabled at (6893817): [<ffffffff817cf369>] __do_softirq kernel/softirq.c:613 [inline]
softirqs last disabled at (6893817): [<ffffffff817cf369>] invoke_softirq kernel/softirq.c:453 [inline]
softirqs last disabled at (6893817): [<ffffffff817cf369>] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
CPU: 1 UID: 0 PID: 5945 Comm: kworker/1:5 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events fqdir_free_fn
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x1f4/0x6b0 kernel/smp.c:679
Code: 00 00 00 66 44 89 ac 24 ce 00 00 00 48 89 de e8 82 fa ff ff 41 89 c5 0f 1f 44 00 00 e8 25 00 0c 00 eb 07 e8 1e 00 0c 00 f3 90 <8b> 9c 24 c8 00 00 00 31 ff 83 e3 01 89 de e8 49 fb 0b 00 85 db 75
RSP: 0018:ffffc900052e7a40 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81afe867
RDX: ffff88801f7f0000 RSI: ffffffff81afe852 RDI: 0000000000000005
RBP: ffffc900052e7b98 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffff92000a5cf50
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124820000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa005d1d58 CR3: 000000006d691000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rcu_barrier kernel/rcu/tree.c:3838 [inline]
 rcu_barrier+0x28d/0x6e0 kernel/rcu/tree.c:3775
 fqdir_free_fn+0x32/0x130 net/ipv4/inet_fragment.c:166
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c5/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18760 Comm: syz.5.2872 Not tainted 6.16.0-rc7-syzkaller-00018-g01a412d06bc5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__lock_acquire+0x126/0x1c90 kernel/locking/lockdep.c:5144
Code: 95 49 89 c4 48 b8 29 5c 8f c2 f5 28 5c 8f 49 c1 fc 03 4c 89 e7 4c 8d a5 f0 0a 00 00 48 0f af f8 89 d8 4c 8d 14 80 49 c1 e2 03 <48> 89 7c 24 10 85 db 74 28 f6 84 24 c0 00 00 00 01 75 1e 4b 8d 74
RSP: 0018:ffffc90000007cf0 EFLAGS: 00000006
RAX: 0000000000000004 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000006d
RBP: ffff888079fc4880 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000000000a0 R11: 0000000000000001 R12: ffff888079fc5370
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880b8427c98
FS:  00007f6f1d94f6c0(0000) GS:ffff888124720000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eff7ff8 CR3: 0000000023722000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5871 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5828
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1765 [inline]
 __hrtimer_run_queues+0x2bc/0xad0 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
Code: 00 e8 c2 59 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 70 84 20 00 48 85 db 0f 85 55 01 00 00 e8 f2 88 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 b7 dc 85
RSP: 0018:ffffc90003ddec28 EFLAGS: 00000287
RAX: ffffffff8f2e8118 RBX: 0000000000000000 RCX: ffffc900201b5000
RDX: 0000000000080000 RSI: ffffffff819b5f7e RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8f2e8118
R13: ffffffff8f2e80c0 R14: ffffc90003ddecb8 R15: dffffc0000000000
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
 vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
 _printk+0xc7/0x100 kernel/printk/printk.c:2475
 __nla_validate_parse+0x751/0x2880 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 nla_parse_nested_deprecated include/net/netlink.h:1365 [inline]
 ctnetlink_parse_tuple_ip net/netfilter/nf_conntrack_netlink.c:1354 [inline]
 ctnetlink_parse_tuple_filter+0x31f/0xa30 net/netfilter/nf_conntrack_netlink.c:1490
 ctnetlink_alloc_filter+0x777/0xaf0 net/netfilter/nf_conntrack_netlink.c:1037
 ctnetlink_start+0xd4/0x200 net/netfilter/nf_conntrack_netlink.c:1082
 __netlink_dump_start+0x60b/0x990 net/netlink/af_netlink.c:2433
 netlink_dump_start include/linux/netlink.h:341 [inline]
 ctnetlink_get_conntrack+0x608/0x7d0 net/netfilter/nf_conntrack_netlink.c:1690
 nfnetlink_rcv_msg+0x9f9/0x1200 net/netfilter/nfnetlink.c:302
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
 nfnetlink_rcv+0x1b3/0x430 net/netfilter/nfnetlink.c:667
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x58a/0x850 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0xa95/0xc70 net/socket.c:2566
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
 __sys_sendmsg+0x16d/0x220 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f1cb8e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6f1d94f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6f1cdb6240 RCX: 00007f6f1cb8e9a9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 000000000000000c
RBP: 00007f6f1cc10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6f1cdb6240 R15: 00007fff60581368
 </TASK>