rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10478 ticks this GP) idle=142/1/0x4000000000000000 softirq=8943/8943 fqs=0 
	(t=10500 jiffies g=6417 q=873)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g6417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3496
rcu: rcu_preempt kthread starved for 10500 jiffies! g6417 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:29480 pid:   13 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x8e2/0x2190 kernel/sched/core.c:5940
 schedule+0xd3/0x270 kernel/sched/core.c:6019
 schedule_timeout+0x11d/0x250 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0xcb9/0x2170 kernel/rcu/tree.c:2177
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 7398 Comm: syz-executor.1 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack_lvl+0xbd/0xe2 lib/dump_stack.c:96
 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_check_gp_kthread_starvation.cold+0x25a/0x25f kernel/rcu/tree_stall.h:478
 print_cpu_stall kernel/rcu/tree_stall.h:622 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x365/0x66e kernel/rcu/tree.c:2649
 update_process_times+0x131/0x1a0 kernel/time/timer.c:1796
 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x19e/0xb90 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x2ef/0x900 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x13e/0x520 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:debug_lockdep_rcu_enabled+0x2b/0x30 kernel/rcu/update.c:282
Code: 05 96 23 c8 02 85 c0 74 21 8b 05 4c 56 c8 02 85 c0 74 17 65 48 8b 04 25 c0 fe 01 00 8b 80 94 09 00 00 85 c0 0f 94 c0 0f b6 c0 <c3> cc cc cc cc 53 48 c7 c3 00 7d 03 00 e8 43 08 00 00 89 c0 48 03
RSP: 0018:ffffc90004c56c90 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200098ad95 RCX: ffffffff81551aa8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a457190
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8a457197
R10: fffffbfff148ae32 R11: 615f6e616d746162 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88812ce669d8 R15: 0000000000000000
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x4a1/0x5d0 kernel/locking/lockdep.c:5596
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 batadv_tt_local_purge+0xfb/0x310 net/batman-adv/translation-table.c:1367
 batadv_tt_local_resize_to_mtu+0x78/0xe0 net/batman-adv/translation-table.c:3987
 batadv_hardif_activate_interface.part.0.cold+0x141/0x1b4 net/batman-adv/hard-interface.c:654
 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:746 [inline]
 batadv_hardif_enable_interface+0x736/0x7e0 net/batman-adv/hard-interface.c:738
 batadv_softif_slave_add+0x48/0xb0 net/batman-adv/soft-interface.c:851
 do_setlink+0x84b/0x2cb0 net/core/rtnetlink.c:2728
 __rtnl_newlink+0xaca/0x13b0 net/core/rtnetlink.c:3393
 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3508
 rtnetlink_rcv_msg+0x32f/0x8c0 net/core/rtnetlink.c:5574
 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:702 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:722
 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2385
 ___sys_sendmsg+0xd3/0x150 net/socket.c:2439
 __sys_sendmsg+0xb2/0x140 net/socket.c:2468
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x463ca9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0268d9d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000463ca9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004ae538 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf00
R13: 00007ffcf177fdbf R14: 00007f0268d9d300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 7398 Comm: syz-executor.1 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack_lvl+0xbd/0xe2 lib/dump_stack.c:96
 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x232/0x360 kernel/rcu/tree_stall.h:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq.cold+0x36a/0x66e kernel/rcu/tree.c:2649
 update_process_times+0x131/0x1a0 kernel/time/timer.c:1796
 tick_sched_handle+0x6f/0x130 kernel/time/tick-sched.c:226
 tick_sched_timer+0x132/0x210 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x19e/0xb90 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x2ef/0x900 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x13e/0x520 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:debug_lockdep_rcu_enabled+0x2b/0x30 kernel/rcu/update.c:282
Code: 05 96 23 c8 02 85 c0 74 21 8b 05 4c 56 c8 02 85 c0 74 17 65 48 8b 04 25 c0 fe 01 00 8b 80 94 09 00 00 85 c0 0f 94 c0 0f b6 c0 <c3> cc cc cc cc 53 48 c7 c3 00 7d 03 00 e8 43 08 00 00 89 c0 48 03
RSP: 0018:ffffc90004c56c90 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff9200098ad95 RCX: ffffffff81551aa8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a457190
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8a457197
R10: fffffbfff148ae32 R11: 615f6e616d746162 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88812ce669d8 R15: 0000000000000000
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x4a1/0x5d0 kernel/locking/lockdep.c:5596
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 batadv_tt_local_purge+0xfb/0x310 net/batman-adv/translation-table.c:1367
 batadv_tt_local_resize_to_mtu+0x78/0xe0 net/batman-adv/translation-table.c:3987
 batadv_hardif_activate_interface.part.0.cold+0x141/0x1b4 net/batman-adv/hard-interface.c:654
 batadv_hardif_activate_interface net/batman-adv/hard-interface.c:746 [inline]
 batadv_hardif_enable_interface+0x736/0x7e0 net/batman-adv/hard-interface.c:738
 batadv_softif_slave_add+0x48/0xb0 net/batman-adv/soft-interface.c:851
 do_setlink+0x84b/0x2cb0 net/core/rtnetlink.c:2728
 __rtnl_newlink+0xaca/0x13b0 net/core/rtnetlink.c:3393
 rtnl_newlink+0x5a/0x90 net/core/rtnetlink.c:3508
 rtnetlink_rcv_msg+0x32f/0x8c0 net/core/rtnetlink.c:5574
 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:702 [inline]
 sock_sendmsg+0xab/0xe0 net/socket.c:722
 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2385
 ___sys_sendmsg+0xd3/0x150 net/socket.c:2439
 __sys_sendmsg+0xb2/0x140 net/socket.c:2468
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x463ca9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0268d9d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000055bf00 RCX: 0000000000463ca9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000004ae538 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf00
R13: 00007ffcf177fdbf R14: 00007f0268d9d300 R15: 0000000000022000