rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10071/1:b..l
(detected by 1, t=10502 jiffies, g=47677, q=281 ncpus=2)
task:rm state:R running task stack:24336 pid:10071 ppid:10010 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
irqentry_exit+0x63/0x70 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:216
Code: 48 8b 3d b0 5a 9d 0c 48 89 de 5b e9 47 22 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 84 fb 7f 7e 65 8b 15 85 fb 7f 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00
RSP: 0018:ffffc90003247980 EFLAGS: 00000286
RAX: ffffffff8a1c05a6 RBX: 0000000000000009 RCX: ffff88802ff59dc0
RDX: 0000000080000000 RSI: ffff888077979c00 RDI: ffffc90003247ac0
RBP: ffffffffffffffff R08: ffff88802ff59dc0 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: ffffc90003247ac0
R13: dffffc0000000000 R14: ffff888077979c00 R15: ffff888077979c00
mas_next_node+0x26/0xb70 lib/maple_tree.c:4635
mt_validate_nulls lib/maple_tree.c:7201 [inline]
mt_validate+0x4611/0x4cb0 lib/maple_tree.c:7249
validate_mm_mt+0xe2/0x440 mm/mmap.c:295
do_brk_flags+0x6c/0xb80 mm/mmap.c:3094
__do_sys_brk mm/mmap.c:262 [inline]
__se_sys_brk+0x818/0xa20 mm/mmap.c:170
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff7b19a76c7
RSP: 002b:00007ffd98a69118 EFLAGS: 00000206 ORIG_RAX: 000000000000000c
RAX: ffffffffffffffda RBX: 0000557a91ad1000 RCX: 00007ff7b19a76c7
RDX: 00007ff7b1a89e50 RSI: 00007ff7b1a82ac0 RDI: 0000557a91ad1000
RBP: 0000557a91ab0000 R08: 0000000000021000 R09: 0000000000000000
R10: 00007ff7b1a82ac0 R11: 0000000000000206 R12: 00007ff7b1a89e50
R13: 00007ff7b1a82b20 R14: 0000000000001000 R15: 00000000000002b0
</TASK>
rcu: rcu_preempt kthread starved for 9700 jiffies! g47677 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:26992 pid:16 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:741