rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10918/2:b..l P4482/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=38101, q=9 ncpus=2)
task:udevd           state:R  running task     stack:24976 pid:4482  ppid:1      flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6864
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x5d/0x70 kernel/locking/spinlock.c:194
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 __wake_up_common_lock+0xe3/0x140 kernel/sched/wait.c:140
 sock_def_readable+0x156/0x750 net/core/sock.c:3324
 __netlink_sendskb net/netlink/af_netlink.c:1289 [inline]
 netlink_sendskb net/netlink/af_netlink.c:1295 [inline]
 netlink_unicast+0x6df/0x810 net/netlink/af_netlink.c:1383
 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2558
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2612
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2641
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4e75324a4b
RSP: 002b:00007ffdcf9202d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000055ef6bd17240 RCX: 00007f4e75324a4b
RDX: 0000000000000000 RSI: 00007ffdcf9202e8 RDI: 0000000000000004
RBP: 000055ef6bd17a60 R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000000b4 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
task:syz-executor.2  state:R  running task     stack:26464 pid:10918 ppid:5060   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7007
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x60/0x70 kernel/kcov.c:225
Code: 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00 8b 92 e4 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 41 57
RSP: 0018:ffffc90004e87118 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc90003a82000
RDX: 0000000000040000 RSI: ffffffff88f5bc0c RDI: 0000000000000005
RBP: ffff88801afffc00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90004e872d8
R13: ffff88801afffc58 R14: 1ffff920009d0e34 R15: dffffc0000000000
 rt6_select net/ipv6/route.c:869 [inline]
 fib6_table_lookup+0x13c/0xa30 net/ipv6/route.c:2183
 ip6_pol_route+0x1bf/0x1210 net/ipv6/route.c:2219
 pol_lookup_func include/net/ip6_fib.h:614 [inline]
 fib6_rule_lookup+0x11e/0x5f0 net/ipv6/fib6_rules.c:116
 ip6_route_output_flags_noref net/ipv6/route.c:2627 [inline]
 ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2639
 ip6_dst_lookup_tail.constprop.0+0x963/0x1760 net/ipv6/ip6_output.c:1137
 ip6_dst_lookup_flow+0x99/0x1c0 net/ipv6/ip6_output.c:1240
 rawv6_sendmsg+0xdb6/0x4100 net/ipv6/raw.c:892
 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:846
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x2ac/0x940 net/socket.c:2558
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2612
 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2698
 __do_sys_sendmmsg net/socket.c:2727 [inline]
 __se_sys_sendmmsg net/socket.c:2724 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2724
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe93c07cae9
RSP: 002b:00007fe93ccff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fe93c19bf80 RCX: 00007fe93c07cae9
RDX: 00000000000004ff RSI: 00000000200092c0 RDI: 0000000000000003
RBP: 00007fe93c0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe93c19bf80 R15: 00007ffd37e35028
 </TASK>