rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P30015/1:b..l
rcu: 	(detected by 0, t=10506 jiffies, g=168733, q=3859 ncpus=2)
task:syz.1.10134     state:R  running task     stack:23752 pid:30015 tgid:30010 ppid:5880   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 preempt_schedule_common+0x82/0xd0
 preempt_schedule_thunk+0x16/0x30
 __local_bh_enable_ip+0xe1/0x130
 bpf_test_run+0x3a8/0x830
 bpf_prog_test_run_skb+0xe2c/0x2260
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0x643/0x950
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8054b9cdd9
RSP: 002b:00007f8055a3b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8054e15fa0 RCX: 00007f8054b9cdd9
RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f8054c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8054e16038 R14: 00007f8054e15fa0 R15: 00007ffd3875a638
 </TASK>
rcu: rcu_preempt kthread starved for 10490 jiffies! g168733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:27536 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 26452 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70
Code: 89 fb e8 23 00 00 00 48 8b 3d d4 eb 60 0c 48 89 de 5b e9 e3 00 60 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0d b8 4b 73 11 65 8b 15 d9 4b 73
RSP: 0018:ffffc900088af558 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88812103c2c8 RCX: ffff8881053e1d80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900088af688 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: fffffbfff206165f R12: 1ffff110478c8199
R13: dffffc0000000000 R14: ffff88823c640cc8 R15: 0000000000000001
FS:  0000555557a01500(0000) GS:ffff88818dc91000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfe79456b8 CR3: 00000000204c4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xfe6/0x13d0
 on_each_cpu_cond_mask+0x3f/0x80
 flush_tlb_mm_range+0x5c3/0x10b0
 dup_mmap+0x17a2/0x1d90
 copy_mm+0x13b/0x4a0
 copy_process+0x1f1c/0x4450
 kernel_clone+0x284/0x8f0
 __x64_sys_clone+0x1b6/0x230
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdfe6bc5852
Code: 89 e7 e8 71 8b f7 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 66 89 c5 85 c0 75 3b 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffe83123ca0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe83123ca0 RCX: 00007fdfe6bc5852
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe83123e2c R08: 0000000000000000 R09: 0000000000000001
R10: 0000555557a017d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000da7f7 R15: 00007ffe83123e80
 </TASK>
ip6_tunnel: ip6tnl2 xmit: Local address not yet configured!
