rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13779/1:b..l P10976/2:b..l P13157/1:b..l P14757/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=177273, q=943 ncpus=1)
task:syz.8.1356      state:R  running task     stack:25840 pid:14757 tgid:14749 ppid:13138  task_flags:0x40054c flags:0x00080001
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x9e3/0x2550
Code: 5d 01 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 04 17 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 1a 17 00 00 <49> 0f bf 45 00 49 01 c0 e9 e5 00 00 00 48 8b 44 24 28 42 80 3c 20
RSP: 0018:ffffc900044df1c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff9184b4b1 RCX: ffffffff90d4c238
RDX: ffffffff9184b4b4 RSI: ffffffff9184b4b0 RDI: ffffffff8c4bc220
RBP: ffffc900044df2a0 R08: ffffc900044df890 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c20 R12: dffffc0000000000
R13: ffffffff9184b4b0 R14: ffffc900044df268 R15: 1ffff9200089be4d
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 save_stack+0x122/0x230
 __reset_page_owner+0x71/0x1f0
 free_pages_prepare+0x9eb/0xaf0
 __free_contig_range_common+0x174/0x340
 free_pages_bulk+0x48/0x120
 vfree+0x224/0x4a0
 packet_set_ring+0x19fd/0x24d0
 packet_release+0x85d/0xd30
 sock_close+0xad/0x220
 __fput+0x418/0xa50
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb1799e0d9
RSP: 002b:00007fcb1891e0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fcb17c26098 RCX: 00007fcb1799e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcb17c26098
RBP: 00007fcb17c26090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcb17c26128 R14: 00007fff64e5c310 R15: 00007fff64e5c3f8
 </TASK>
task:kworker/u8:1    state:R  running task     stack:24464 pid:13157 tgid:13157 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: bat_events batadv_mcast_mla_update
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_get_return_address+0x4/0x90
Code: e8 11 97 bd 00 4c 89 f7 4c 89 fe e9 29 ff ff ff e8 61 23 58 0a 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <41> 57 41 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df 48 89 f8 48
RSP: 0018:ffffc9000352f4c0 EFLAGS: 00000202
RAX: 00000000f21da101 RBX: ffffc9000352f580 RCX: 0000000000000046
RDX: 0000000000000003 RSI: ffffffff8e4aacbf RDI: ffffc9000352f4c8
RBP: ffffc9000352f550 R08: ffffc9000352ff38 R09: 0000000000000000
R10: ffffc9000352f518 R11: fffff520006a5ea5 R12: ffff8881027b5940
R13: ffff888109ef9040 R14: ffffffff81b1df90 R15: ffffc9000352f4c8
 arch_stack_walk+0xfb/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x32d/0x660
 batadv_mcast_mla_update+0x18e2/0x3730
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
task:kworker/u9:8    state:R  running task     stack:23528 pid:10976 tgid:10976 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound macvlan_process_broadcast
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x1977/0x2550
Code: 0f 85 ab 0a 00 00 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 bd 0a 00 00 49 0f bf 04 24 48 01 c6 4c 89 f7 48 89 da eb 41 <49> 8d 5d 02 49 83 c5 03 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0
RSP: 0018:ffffc9000639f3c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9000639f518 RCX: 0000000000000000
RDX: ffffffff90ee211e RSI: 0000000000000008 RDI: ffffc9000639f528
RBP: 1ffffffff21dc423 R08: ffffc9000639f4c8 R09: 0000000000000000
R10: ffffc9000639f518 R11: fffff52000c73ea5 R12: dffffc0000000000
R13: ffffffff90ee211a R14: ffffc9000639f4c8 R15: ffffc9000639f510
 __unwind_start+0x514/0x660
 arch_stack_walk+0xe3/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x2a0/0x5f0
 skb_clone+0x212/0x3a0
 macvlan_broadcast+0x24e/0x630
 macvlan_process_broadcast+0x437/0x660
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
task:syz-executor    state:R  running task     stack:22224 pid:13779 tgid:13779 ppid:13776  task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:copy_pmd_range+0x5210/0x5c00
Code: 00 fc ff df eb 24 e8 cf 88 aa ff c6 05 bb 21 24 0e 01 48 c7 c7 40 5c fa 8b be 66 03 00 00 48 c7 c2 60 61 fa 8b e8 f0 87 86 ff <48> c7 c7 20 9c b5 8e 4c 89 f6 e8 71 6e 86 ff e8 3c 1d 90 ff 48 c7
RSP: 0018:ffffc90003df7300 EFLAGS: 00000293
RAX: ffffffff821c5eae RBX: ffff88810bd5e3c0 RCX: ffff888113901dc0
RDX: 0000000000000000 RSI: ffffffff8c4bc260 RDI: ffffffff8c4bc220
RBP: ffffc90003df7590 R08: ffff88810ccb6903 R09: 1ffff11021996d20
R10: dffffc0000000000 R11: ffffed1021996d21 R12: 00007f355c078000
R13: 00007f355c200000 R14: ffffffff821c5e59 R15: dffffc0000000000
 copy_page_range+0xc82/0x1290
 dup_mmap+0xf17/0x1dc0
 copy_mm+0x11a/0x480
 copy_process+0x1e3e/0x4390
 kernel_clone+0x2d7/0x940
 __x64_sys_clone+0x1b6/0x230
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f355c9c6b52
RSP: 002b:00007ffc8ee75860 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc8ee75860 RCX: 00007f355c9c6b52
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc8ee759ec R08: 0000000000000000 R09: 0000000000000001
R10: 0000555578e8a7d0 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000000927c0 R14: 00000000000819d8 R15: 00007ffc8ee75a40
 </TASK>
rcu: rcu_preempt kthread starved for 9568 jiffies! g177273 f0x0 RCU_GP_INIT(4) ->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:27752 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_gp_init+0x12cb/0x15c0
Code: b1 fd ff ff e8 c6 06 88 00 e9 a7 fd ff ff 89 f9 80 e1 07 38 c1 0f 8c e8 fb ff ff e8 af 06 88 00 e9 de fb ff ff bf 01 00 00 00 <e8> 10 57 e7 ff e8 2b bd fe ff e8 66 b1 22 0a 89 c3 83 f8 08 0f 83
RSP: 0018:ffffc90000157c40 EFLAGS: 00000246
RAX: ffffffff8eb5fcc0 RBX: ffff888102ed04f0 RCX: ffffffff8eb5fcc0
RDX: 0000000000000000 RSI: ffffffff8e4aacbf RDI: 0000000000000001
RBP: ffffc90000157d30 R08: ffffffff90571d37 R09: 1ffffffff20ae3a6
R10: dffffc0000000000 R11: fffffbfff20ae3a7 R12: 0000000000000500
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
 rcu_gp_kthread+0x18b/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: 14765 Comm: syz.1.1362 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:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 6a 7d d0 f5 48 89 df e8 c2 f2 d0 f5 e8 1d d1 fc f5 fb bf 01 00 00 00 <e8> e2 08 c2 f5 65 8b 05 cb df 99 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc9000424fc78 EFLAGS: 00000206
RAX: 0000000005c7a98d RBX: ffff888104bca600 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8e226439 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff90571d37 R09: 1ffffffff20ae3a6
R10: dffffc0000000000 R11: fffffbfff20ae3a7 R12: 0000000000000021
R13: ffff888104bcaa98 R14: 000000001c000004 R15: dffffc0000000000
FS:  00007f1bf66f76c0(0000) GS:ffff88818d95d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000114f80000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 get_signal+0x1136/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1bf579e0d7
Code: 83 c8 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
RSP: 002b:00007f1bf66f70e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f1bf5a25fa8 RCX: 00007f1bf579e0d9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1bf5a25fa8
RBP: 00007f1bf5a25fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1bf5a26038 R14: 00007fffdc310f90 R15: 00007fffdc311078
 </TASK>
clocksource: Marking clocksource tsc unstable due to frequency skew
clocksource: Watchdog               kvm-clock interval:             5435ns
clocksource: Clocksource                  tsc interval:             5163ns
tsc: Marking TSC unstable due to clocksource watchdog
