bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 0-...!: (10348 ticks this GP) idle=412/1/0x4000000000000004 softirq=10701/10715 fqs=8
rcu: (t=10500 jiffies g=-831 q=0)
rcu: rcu_sched kthread starved for 9452 jiffies! g-831 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_sched R running task 30040 11 2 0x80000000
Call Trace:
context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517
schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561
schedule_timeout+0x4cf/0xfe0 syzkaller/managers/linux-4-19/kernel/kernel/time/timer.c:1818
rcu_gp_kthread+0xdad/0x21c0 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:2202
kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259
ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415
NMI backtrace for cpu 0
CPU: 0 PID: 9862 Comm: syz-executor.4 Not tainted 4.19.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 syzkaller/managers/linux-4-19/kernel/lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace syzkaller/managers/linux-4-19/kernel/./include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x15f/0x19c syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:1340
print_cpu_stall syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:1478 [inline]
check_cpu_stall syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:1550 [inline]
__rcu_pending syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:3293 [inline]
rcu_pending syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:3336 [inline]
rcu_check_callbacks.cold+0x62d/0xe19 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:2682
update_process_times+0x2a/0x70 syzkaller/managers/linux-4-19/kernel/kernel/time/timer.c:1650
tick_sched_handle+0x9b/0x180 syzkaller/managers/linux-4-19/kernel/kernel/time/tick-sched.c:168
tick_sched_timer+0xfc/0x290 syzkaller/managers/linux-4-19/kernel/kernel/time/tick-sched.c:1278
__run_hrtimer syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1401 [inline]
__hrtimer_run_queues+0x3f6/0xe60 syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1463
hrtimer_interrupt+0x32a/0x930 syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1521
local_apic_timer_interrupt syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/apic/apic.c:1067 [inline]
smp_apic_timer_interrupt+0x10c/0x550 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/apic/apic.c:1092
apic_timer_interrupt+0xf/0x20 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:894
RIP: 0010:sk_to_full_sk syzkaller/managers/linux-4-19/kernel/./include/net/inet_sock.h:247 [inline]
RIP: 0010:skb_to_full_sk syzkaller/managers/linux-4-19/kernel/./include/net/inet_sock.h:265 [inline]
RIP: 0010:ip_vs_out+0x115/0x1e10 syzkaller/managers/linux-4-19/kernel/net/netfilter/ipvs/ip_vs_core.c:1336
Code: 00 00 e8 5e f2 98 fa 49 8d 7f 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 3b 18 00 00 49 8b 5f 18 <48> 85 db 74 6d e8 31 f2 98 fa 48 8d 7b 12 48 b8 00 00 00 00 00 fc
RSP: 0018:ffff8880ba0070a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86c96755
RDX: 1ffff110162af0cb RSI: ffffffff86c96762 RDI: ffff8880b1578658
RBP: ffff8880ba007278 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a176b140
R13: ffff8880b1578640 R14: ffff8880ba007320 R15: ffff8880b1578640
nf_hook_entry_hookfn syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xc5/0x1e0 syzkaller/managers/linux-4-19/kernel/net/netfilter/core.c:511
nf_hook syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:244 [inline]
NF_HOOK syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:287 [inline]
br_nf_forward_ip+0xc72/0x15e0 syzkaller/managers/linux-4-19/kernel/net/bridge/br_netfilter_hooks.c:620
nf_hook_entry_hookfn syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xc5/0x1e0 syzkaller/managers/linux-4-19/kernel/net/netfilter/core.c:511
nf_hook syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:244 [inline]
NF_HOOK syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:287 [inline]
__br_forward+0x354/0xae0 syzkaller/managers/linux-4-19/kernel/net/bridge/br_forward.c:113
deliver_clone syzkaller/managers/linux-4-19/kernel/net/bridge/br_forward.c:129 [inline]
maybe_deliver+0x292/0x380 syzkaller/managers/linux-4-19/kernel/net/bridge/br_forward.c:184
br_flood+0x158/0x4d0 syzkaller/managers/linux-4-19/kernel/net/bridge/br_forward.c:226
br_handle_frame_finish+0xf41/0x1410 syzkaller/managers/linux-4-19/kernel/net/bridge/br_input.c:167
br_nf_hook_thresh+0x2a3/0x330 syzkaller/managers/linux-4-19/kernel/net/bridge/br_netfilter_hooks.c:1014
br_nf_pre_routing_finish_ipv6+0x6e3/0xd40 syzkaller/managers/linux-4-19/kernel/net/bridge/br_netfilter_ipv6.c:210
NF_HOOK syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:289 [inline]
br_nf_pre_routing_ipv6+0x3f4/0x860 syzkaller/managers/linux-4-19/kernel/net/bridge/br_netfilter_ipv6.c:240
br_nf_pre_routing+0xf05/0x1500 syzkaller/managers/linux-4-19/kernel/net/bridge/br_netfilter_hooks.c:494
nf_hook_entry_hookfn syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xc5/0x1e0 syzkaller/managers/linux-4-19/kernel/net/netfilter/core.c:511
nf_hook syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:244 [inline]
NF_HOOK syzkaller/managers/linux-4-19/kernel/./include/linux/netfilter.h:287 [inline]
br_handle_frame+0xa60/0x13b0 syzkaller/managers/linux-4-19/kernel/net/bridge/br_input.c:306
__netif_receive_skb_core+0x929/0x3270 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:4876
__netif_receive_skb_one_core+0xae/0x180 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:4952
__netif_receive_skb+0x27/0x1c0 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:5066
process_backlog+0x241/0x700 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:5848
napi_poll syzkaller/managers/linux-4-19/kernel/net/core/dev.c:6272 [inline]
net_rx_action+0x4ac/0xfb0 syzkaller/managers/linux-4-19/kernel/net/core/dev.c:6338
__do_softirq+0x265/0x980 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:292
invoke_softirq syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:372 [inline]
irq_exit+0x215/0x260 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:412
exiting_irq syzkaller/managers/linux-4-19/kernel/./arch/x86/include/asm/apic.h:545 [inline]
smp_apic_timer_interrupt+0x136/0x550 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/apic/apic.c:1094
apic_timer_interrupt+0xf/0x20 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:894
RIP: 0010:lock_page_memcg+0x4/0x220 syzkaller/managers/linux-4-19/kernel/mm/memcontrol.c:1893
Code: ff 48 8b 04 24 e9 70 fe ff ff 48 89 df e8 b4 0a fb ff e9 4b ff ff ff e8 7a 0d fb ff e9 63 ff ff ff 0f 1f 44 00 00 41 57 41 56 <41> 55 41 54 55 53 48 89 fb 48 83 ec 08 e8 fa e2 b3 ff 31 d2 45 31
RSP: 0018:ffff8880391376e8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff88809a2fa540 RBX: 0000000000000000 RCX: ffffffff818f5be1
RDX: 0000000000000000 RSI: ffffffff818f5bee RDI: ffffea00023c9f00
RBP: ffffea00023c9f00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffea00023c9f00 R15: 00007fcfea107000
page_remove_file_rmap+0x36/0xa30 syzkaller/managers/linux-4-19/kernel/mm/rmap.c:1215
page_remove_rmap+0xe5/0x120 syzkaller/managers/linux-4-19/kernel/mm/rmap.c:1300
zap_pte_range syzkaller/managers/linux-4-19/kernel/mm/memory.c:1350 [inline]
zap_pmd_range syzkaller/managers/linux-4-19/kernel/mm/memory.c:1452 [inline]
zap_pud_range syzkaller/managers/linux-4-19/kernel/mm/memory.c:1481 [inline]
zap_p4d_range syzkaller/managers/linux-4-19/kernel/mm/memory.c:1502 [inline]
unmap_page_range+0x12f6/0x2a70 syzkaller/managers/linux-4-19/kernel/mm/memory.c:1523
unmap_single_vma+0x198/0x300 syzkaller/managers/linux-4-19/kernel/mm/memory.c:1568
unmap_vmas+0xa9/0x180 syzkaller/managers/linux-4-19/kernel/mm/memory.c:1598
exit_mmap+0x2b9/0x530 syzkaller/managers/linux-4-19/kernel/mm/mmap.c:3093
__mmput syzkaller/managers/linux-4-19/kernel/kernel/fork.c:1015 [inline]
mmput+0x14e/0x4a0 syzkaller/managers/linux-4-19/kernel/kernel/fork.c:1036
exit_mm syzkaller/managers/linux-4-19/kernel/kernel/exit.c:549 [inline]
do_exit+0xaec/0x2be0 syzkaller/managers/linux-4-19/kernel/kernel/exit.c:857
do_group_exit+0x125/0x310 syzkaller/managers/linux-4-19/kernel/kernel/exit.c:967
get_signal+0x3f2/0x1f70 syzkaller/managers/linux-4-19/kernel/kernel/signal.c:2589
do_signal+0x8f/0x1670 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/signal.c:821
exit_to_usermode_loop+0x204/0x2a0 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:163
prepare_exit_to_usermode syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465d99
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:00007fcfe81bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 000000000056bf60 RCX: 0000000000465d99
RDX: 00000000200001c0 RSI: 00000000c0c0583b RDI: 0000000000000004
RBP: 00000000004bcf27 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdb2c7236f R14: 00007fcfe81bf300 R15: 0000000000022000
net_ratelimit: 347 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:b2:e2:0e:12:58:93, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:b2:e2:0e:12:58:93, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
net_ratelimit: 213 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:b2:e2:0e:12:58:93, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:b2:e2:0e:12:58:93, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 0, t=10502 jiffies, g=8561, q=2047)
rcu: All QSes seen, last rcu_preempt kthread activity 10386 (4294967104-4294956718), jiffies_till_next_fqs=1, root ->qsmask 0x0
kworker/0:4 R running task 29224 9346 2 0x80000000
Workqueue: events_power_efficient neigh_periodic_work
Call Trace:
sched_show_task.cold+0x332/0x396 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:5337
print_other_cpu_stall syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:1430 [inline]
check_cpu_stall syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:1557 [inline]
__rcu_pending syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:3293 [inline]
rcu_pending syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:3336 [inline]
rcu_check_callbacks.cold+0xb37/0xe19 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:2682
update_process_times+0x2a/0x70 syzkaller/managers/linux-4-19/kernel/kernel/time/timer.c:1650
tick_sched_handle+0x9b/0x180 syzkaller/managers/linux-4-19/kernel/kernel/time/tick-sched.c:168
tick_sched_timer+0xfc/0x290 syzkaller/managers/linux-4-19/kernel/kernel/time/tick-sched.c:1278
__run_hrtimer syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1401 [inline]
__hrtimer_run_queues+0x3f6/0xe60 syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1463
hrtimer_interrupt+0x32a/0x930 syzkaller/managers/linux-4-19/kernel/kernel/time/hrtimer.c:1521
local_apic_timer_interrupt syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/apic/apic.c:1067 [inline]
smp_apic_timer_interrupt+0x10c/0x550 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/apic/apic.c:1092
apic_timer_interrupt+0xf/0x20 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:894
RIP: 0010:unwind_next_frame+0x4c/0x1c60 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/unwind_orc.c:397
Code: 40 b3 8a b5 41 48 8d 5c 24 40 48 c7 44 24 48 bd 16 b6 89 48 c1 eb 03 48 c7 44 24 50 00 7f 29 81 48 8d 14 03 c7 02 f1 f1 f1 f1 42 04 00 f3 f3 f3 48 89 fa 65 48 8b 34 25 28 00 00 00 48 89 b4
RSP: 0018:ffff8880ba0077e8 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff11017400f05 RCX: 0000000000000006
RDX: ffffed1017400f05 RSI: ffff8880ba007778 RDI: ffff8880ba0078d0
RBP: ffff8880ba007950 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000074071 R11: 0000000000000001 R12: ffff8880ba007968
R13: 0000000000000000 R14: ffff8880b5bbe780 R15: ffff8880ba0078d0
__save_stack_trace+0x9f/0x190 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/stacktrace.c:44
save_stack syzkaller/managers/linux-4-19/kernel/mm/kasan/kasan.c:448 [inline]
set_track syzkaller/managers/linux-4-19/kernel/mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xeb/0x160 syzkaller/managers/linux-4-19/kernel/mm/kasan/kasan.c:553
slab_post_alloc_hook syzkaller/managers/linux-4-19/kernel/mm/slab.h:445 [inline]
slab_alloc_node syzkaller/managers/linux-4-19/kernel/mm/slab.c:3340 [inline]
kmem_cache_alloc_node+0x133/0x3b0 syzkaller/managers/linux-4-19/kernel/mm/slab.c:3647
__alloc_skb+0x71/0x560 syzkaller/managers/linux-4-19/kernel/net/core/skbuff.c:193
skb_copy+0x139/0x2f0 syzkaller/managers/linux-4-19/kernel/net/core/skbuff.c:1358
mac80211_hwsim_tx_frame_no_nl.isra.0+0xb8a/0x1330 syzkaller/managers/linux-4-19/kernel/drivers/net/wireless/mac80211_hwsim.c:1353
mac80211_hwsim_tx_frame+0x12b/0x210 syzkaller/managers/linux-4-19/kernel/drivers/net/wireless/mac80211_hwsim.c:1556
mac80211_hwsim_beacon_tx+0x3f8/0x680 syzkaller/managers/linux-4-19/kernel/drivers/net/wireless/mac80211_hwsim.c:1595
__iterate_interfaces+0x2e1/0x4a0 syzkaller/managers/linux-4-19/kernel/net/mac80211/util.c:614
ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 syzkaller/managers/linux-4-19/kernel/net/mac80211/util.c:650
mac80211_hwsim_beacon+0xc9/0x190 syzkaller/managers/linux-4-19/kernel/drivers/net/wireless/mac80211_hwsim.c:1615
__tasklet_hrtimer_trampoline+0x29/0xa0 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:601
tasklet_action_common.constprop.0+0x265/0x360 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:522
__do_softirq+0x265/0x980 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:292
do_softirq_own_stack+0x2a/0x40 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:1092
do_softirq.part.0+0x160/0x1c0 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:336
do_softirq syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:328 [inline]
__local_bh_enable_ip+0x20e/0x270 syzkaller/managers/linux-4-19/kernel/kernel/softirq.c:189
neigh_periodic_work+0x551/0xa30 syzkaller/managers/linux-4-19/kernel/net/core/neighbour.c:858
process_one_work+0x864/0x1570 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2155
worker_thread+0x64c/0x1130 syzkaller/managers/linux-4-19/kernel/kernel/workqueue.c:2298
kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259
ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415
rcu: rcu_preempt kthread starved for 10386 jiffies! g8561 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt R running task 29528 10 2 0x80000000
Call Trace:
context_switch syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3517
schedule+0x8d/0x1b0 syzkaller/managers/linux-4-19/kernel/kernel/sched/core.c:3561
schedule_timeout+0x4cf/0xfe0 syzkaller/managers/linux-4-19/kernel/kernel/time/timer.c:1818
rcu_gp_kthread+0xdad/0x21c0 syzkaller/managers/linux-4-19/kernel/kernel/rcu/tree.c:2202
kthread+0x33f/0x460 syzkaller/managers/linux-4-19/kernel/kernel/kthread.c:259
ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:415