rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (7147 ticks this GP) idle=351/1/0x4000000000000000 softirq=20293/20294 fqs=61
(t=10502 jiffies g=26097 q=1030)
rcu: rcu_preempt kthread starved for 1461 jiffies! g26097 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28736 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0x940/0x26f0 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15980 Comm: syz-executor.2 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:104 [inline]
RIP: 0010:rcu_read_lock_sched_held+0xd/0x70 kernel/rcu/update.c:123
Code: 01 44 89 e0 41 5c c3 45 31 e4 44 89 e0 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 54 41 bc 01 00 00 00 e8 33 88 d2 07 <85> c0 75 06 44 89 e0 41 5c c3 e8 e4 8c 00 00 84 c0 74 41 e8 fb 9a
RSP: 0018:ffffc90000dc0110 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff812a10f2
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff8d6e53d0
RBP: ffffc90000dc0148 R08: 0000000000000000 R09: ffffffff8d6e53d7
R10: fffffbfff1adca7a R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe028519000 CR3: 000000001852a000 CR4: 0000000000350ee0
Call Trace:
trace_irq_work_exit arch/x86/include/asm/trace/irq_vectors.h:64 [inline]
__sysvec_irq_work+0x1af/0x3d0 arch/x86/kernel/irq_work.c:23
sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
RIP: 0010:__sanitizer_cov_trace_switch+0x3c/0xf0 kernel/kcov.c:319
Code: f8 20 0f 84 c4 00 00 00 0f 87 9e 00 00 00 48 83 f8 08 0f 84 aa 00 00 00 48 83 f8 10 0f 85 83 00 00 00 bb 03 00 00 00 4d 8b 10 <31> c9 65 4c 8b 24 25 40 f0 01 00 4d 85 d2 74 6b 4c 89 e6 bf 03 00
RSP: 0018:ffffc90000dc01f8 EFLAGS: 00000246
RAX: 0000000000000020 RBX: 0000000000000005 RCX: 0000000000000100
RDX: ffff888039369c80 RSI: ffffffff8ab3dce0 RDI: 0000000000000006
RBP: 0000000000000000 R08: ffffffff8ab3dce0 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000006 R12: ffffc90000dc02b8
R13: dffffc0000000000 R14: ffff88801844c000 R15: 0000000000000000
jhash+0x22/0x230 include/linux/jhash.h:88
batadv_choose_tt net/batman-adv/translation-table.c:110 [inline]
batadv_tt_hash_find+0x12c/0x6a0 net/batman-adv/translation-table.c:139
batadv_tt_global_hash_find net/batman-adv/translation-table.c:202 [inline]
batadv_tt_local_add+0x709/0x1f40 net/batman-adv/translation-table.c:662
batadv_interface_tx+0x758/0x16e0 net/batman-adv/soft-interface.c:247
__netdev_start_xmit include/linux/netdevice.h:4970 [inline]
netdev_start_xmit include/linux/netdevice.h:4984 [inline]
xmit_one net/core/dev.c:3576 [inline]
dev_hard_start_xmit+0x1eb/0x920 net/core/dev.c:3592
sch_direct_xmit+0x19f/0xbb0 net/sched/sch_generic.c:342
qdisc_restart net/sched/sch_generic.c:407 [inline]
__qdisc_run+0x4bc/0x1700 net/sched/sch_generic.c:415
__dev_xmit_skb net/core/dev.c:3861 [inline]
__dev_queue_xmit+0x1f6e/0x3710 net/core/dev.c:4170
neigh_hh_output include/net/neighbour.h:499 [inline]
neigh_output include/net/neighbour.h:508 [inline]
ip6_finish_output2+0x922/0x1500 net/ipv6/ip6_output.c:126
__ip6_finish_output net/ipv6/ip6_output.c:191 [inline]
__ip6_finish_output+0x4c1/0x1050 net/ipv6/ip6_output.c:170
ip6_finish_output+0x32/0x200 net/ipv6/ip6_output.c:201
NF_HOOK_COND include/linux/netfilter.h:296 [inline]
ip6_output+0x1e4/0x530 net/ipv6/ip6_output.c:224
dst_output include/net/dst.h:450 [inline]
NF_HOOK include/linux/netfilter.h:307 [inline]
ndisc_send_skb+0xa99/0x17f0 net/ipv6/ndisc.c:508
ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3885
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:PageMemcgKmem include/linux/memcontrol.h:537 [inline]
RIP: 0010:page_memcg+0x20/0x250 include/linux/memcontrol.h:452
Code: fa ff e9 a4 f4 ff ff 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 41 54 55 48 89 fd 48 83 c7 38 48 89 fa 53 48 c1 ea 03 80 3c 02 00 <0f> 85 c6 01 00 00 48 8b 5d 38 f6 c3 01 0f 85 50 01 00 00 48 8d 7d
RSP: 0018:ffffc90002d9f710 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff8161d004
RDX: 1ffffd40002c954f RSI: 0000000000000004 RDI: ffffea000164aa78
RBP: ffffea000164aa40 R08: 0000000000000000 R09: ffff8880b9d3298b
R10: ffffed10173a6531 R11: 0000000000000000 R12: 00000000ffffffff
R13: 0000000000000012 R14: ffffea000164aa40 R15: 00007f44520de000
__mod_lruvec_page_state+0xd4/0x2c0 mm/memcontrol.c:746
page_remove_file_rmap mm/rmap.c:1287 [inline]
page_remove_rmap+0x71f/0x1480 mm/rmap.c:1349
zap_pte_range mm/memory.c:1362 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0xed5/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x620 mm/mmap.c:3195
__mmput+0x122/0x470 kernel/fork.c:1103
mmput+0x58/0x60 kernel/fork.c:1124
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: Unable to access opcode bytes at RIP 0x4665cf.
RSP: 002b:00007f4451880188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: fffffffffffffdfe RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000040
RBP: 00000000004bfcc4 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe976b062f R14: 00007f4451880300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 15966 Comm: syz-executor.0 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 1a e7 24 f8 48 89 ef e8 62 5d 25 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 63 1e 19 f8 65 8b 05 2c 6c cb 76 85 c0 74 0a 5b 5d c3 e8 40 bc
RSP: 0018:ffffc90000007e28 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000200 RCX: 1ffffffff1add0dd
RDX: 0000000000000000 RSI: ffffffff817c4071 RDI: 0000000000000001
RBP: ffff8880b9c223c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff817c4058 R11: 0000000000000000 R12: 00000042bdfdcb11
R13: ffff8880b9c22640 R14: ffff8880b9c223c0 R15: ffffffff85355630
__run_hrtimer kernel/time/hrtimer.c:1681 [inline]
__hrtimer_run_queues+0x51a/0xe50 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x60 kernel/kcov.c:197
Code: 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 f9 d7 8b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 00 01 ff 00 74 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b
RSP: 0018:ffffc90002d0f7a8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00fff00000002036 RCX: 0000000000000000
RDX: ffff8880151cd580 RSI: ffffffff81ab0ba2 RDI: 0000000000000003
RBP: ffffea0000e09b80 R08: ffffffffffffffff R09: 0000000000000000
R10: ffffffff81ab0b93 R11: 0000000000000000 R12: ffffea0000e09b88
R13: ffffea0000e09b48 R14: dffffc0000000000 R15: 000000000042c000
_compound_head include/linux/page-flags.h:185 [inline]
PageSwapBacked include/linux/page-flags.h:360 [inline]
mm_counter_file include/linux/mm.h:1961 [inline]
mm_counter include/linux/mm.h:1970 [inline]
zap_pte_range mm/memory.c:1361 [inline]
zap_pmd_range mm/memory.c:1481 [inline]
zap_pud_range mm/memory.c:1510 [inline]
zap_p4d_range mm/memory.c:1531 [inline]
unmap_page_range+0xe22/0x2a10 mm/memory.c:1552
unmap_single_vma+0x198/0x310 mm/memory.c:1597
unmap_vmas+0x16d/0x2f0 mm/memory.c:1629
exit_mmap+0x1d0/0x620 mm/mmap.c:3195
__mmput+0x122/0x470 kernel/fork.c:1103
mmput+0x58/0x60 kernel/fork.c:1124
exit_mm kernel/exit.c:501 [inline]
do_exit+0xabc/0x2a30 kernel/exit.c:812
do_group_exit+0x125/0x310 kernel/exit.c:922
get_signal+0x47f/0x2160 kernel/signal.c:2868
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: Unable to access opcode bytes at RIP 0x4665cf.
RSP: 002b:00007fb21baab188 EFLAGS: 00000246 ORIG_RAX: 000000000000010e
RAX: fffffffffffffdfe RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000040
RBP: 00000000004bfcc4 R08: 0000000020000200 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007fff8ef900ef R14: 00007fb21baab300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 01 44 89 e0 add %eax,-0x20(%rcx,%rcx,4)
4: 41 5c pop %r12
6: c3 retq
7: 45 31 e4 xor %r12d,%r12d
a: 44 89 e0 mov %r12d,%eax
d: 41 5c pop %r12
f: c3 retq
10: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
17: 00 00 00 00
1b: 66 90 xchg %ax,%ax
1d: 41 54 push %r12
1f: 41 bc 01 00 00 00 mov $0x1,%r12d
25: e8 33 88 d2 07 callq 0x7d2885d
* 2a: 85 c0 test %eax,%eax <-- trapping instruction
2c: 75 06 jne 0x34
2e: 44 89 e0 mov %r12d,%eax
31: 41 5c pop %r12
33: c3 retq
34: e8 e4 8c 00 00 callq 0x8d1d
39: 84 c0 test %al,%al
3b: 74 41 je 0x7e
3d: e8 .byte 0xe8
3e: fb sti
3f: 9a (bad)