rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=5ff/1/0x4000000000000000 softirq=176845/176846 fqs=1
(t=10502 jiffies g=336865 q=6904)
rcu: rcu_preempt kthread timer wakeup didn't happen for 8982 jiffies! g336865 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=159133
rcu: rcu_preempt kthread starved for 8985 jiffies! g336865 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:28000 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
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: 30562 Comm: syz-executor.0 Not tainted 5.15.0-next-20211112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ktime_add_safe kernel/time/hrtimer.c:335 [inline]
RIP: 0010:hrtimer_add_expires include/linux/hrtimer.h:266 [inline]
RIP: 0010:hrtimer_forward+0x109/0x270 kernel/time/hrtimer.c:1066
Code: 89 ef 4c 89 7c 24 08 e8 75 d6 10 00 4c 39 e5 0f 8e f6 00 00 00 41 be 01 00 00 00 e8 f1 d2 10 00 4c 8b 64 24 10 31 ff 49 01 ec <4c> 89 e6 e8 6f d5 10 00 4d 85 e4 48 b8 ff ff ff ff ff ff ff 7f 78
RSP: 0018:ffffc90000dc0bf0 EFLAGS: 00000006
RAX: 0000000080010001 RBX: ffff8881937c3068 RCX: 0000000000000000
RDX: ffff8880480157c0 RSI: ffffffff81671bcf RDI: 0000000000000000
RBP: 0000000000002710 R08: 00000225158e6f79 R09: 0000000000000000
R10: ffffffff81671d00 R11: 0000000000000000 R12: 00000225158e90a9
R13: 00000225158e6999 R14: 0000000000000002 R15: 00000225158e6999
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61529efce9 CR3: 000000006ed3d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hrtimer_forward_now include/linux/hrtimer.h:506 [inline]
perf_swevent_hrtimer+0x254/0x3f0 kernel/events/core.c:10602
__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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:lock_release+0x3f1/0x720 kernel/locking/lockdep.c:5645
Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9001026f6e0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: aceda8242ca9ced0 RCX: ffffc9001026f730
RDX: 1ffff11009002c43 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff9200204dede R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000002 R14: ffff888048016220 R15: ffff8880480157c0
zap_pte_range mm/memory.c:1361 [inline]
zap_pmd_range mm/memory.c:1471 [inline]
zap_pud_range mm/memory.c:1500 [inline]
zap_p4d_range mm/memory.c:1521 [inline]
unmap_page_range+0xf0e/0x29f0 mm/memory.c:1542
unmap_single_vma+0x198/0x310 mm/memory.c:1587
unmap_vmas+0x16b/0x2f0 mm/memory.c:1619
exit_mmap+0x1d0/0x630 mm/mmap.c:3170
__mmput+0x122/0x4b0 kernel/fork.c:1164
mmput+0x56/0x60 kernel/fork.c:1185
exit_mm kernel/exit.c:507 [inline]
do_exit+0xb27/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2830
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
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:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fa827d0aae9
Code: Unable to access opcode bytes at RIP 0x7fa827d0aabf.
RSP: 002b:00007fa825280218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fa827e1df68 RCX: 00007fa827d0aae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fa827e1df68
RBP: 00007fa827e1df60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa827e1df6c
R13: 00007fff6c0cef5f R14: 00007fa825280300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 11202 Comm: syz-executor.3 Not tainted 5.15.0-next-20211112-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:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 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:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
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+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:write_comp_data kernel/kcov.c:221 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x3/0x70 kernel/kcov.c:294
Code: 44 89 c6 48 83 c2 01 48 89 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 c3 0f 1f 40 00 49 89 f8 03 00 00 00 4c 8b 14 24 48 89 f1 65 48 8b 34 25 40 70 02 00 e8
RSP: 0018:ffffc9000c99f7a0 EFLAGS: 00000282
RAX: 1ffff11032a3b1e2 RBX: 80000000188e7007 RCX: 0000000000000000
RDX: ffff8880267fd7c0 RSI: 80000000188e7007 RDI: 0000000000000000
RBP: ffffea000086bf00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81accd83 R11: 0000000000000000 R12: 80000000188e7007
R13: ffff8881951d8f10 R14: dffffc0000000000 R15: 00007efc8b1e3000
zap_pte_range mm/memory.c:1333 [inline]
zap_pmd_range mm/memory.c:1471 [inline]
zap_pud_range mm/memory.c:1500 [inline]
zap_p4d_range mm/memory.c:1521 [inline]
unmap_page_range+0xa8d/0x29f0 mm/memory.c:1542
unmap_single_vma+0x198/0x310 mm/memory.c:1587
unmap_vmas+0x16b/0x2f0 mm/memory.c:1619
exit_mmap+0x1d0/0x630 mm/mmap.c:3170
__mmput+0x122/0x4b0 kernel/fork.c:1164
mmput+0x56/0x60 kernel/fork.c:1185
exit_mm kernel/exit.c:507 [inline]
do_exit+0xb27/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2830
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
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:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7efc8d087ae9
Code: Unable to access opcode bytes at RIP 0x7efc8d087abf.
RSP: 002b:00007efc8a5fd218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efc8d19af68 RCX: 00007efc8d087ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efc8d19af68
RBP: 00007efc8d19af60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efc8d19af6c
R13: 00007ffcf9cf990f R14: 00007efc8a5fd300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 89 ef mov %ebp,%edi
2: 4c 89 7c 24 08 mov %r15,0x8(%rsp)
7: e8 75 d6 10 00 callq 0x10d681
c: 4c 39 e5 cmp %r12,%rbp
f: 0f 8e f6 00 00 00 jle 0x10b
15: 41 be 01 00 00 00 mov $0x1,%r14d
1b: e8 f1 d2 10 00 callq 0x10d311
20: 4c 8b 64 24 10 mov 0x10(%rsp),%r12
25: 31 ff xor %edi,%edi
27: 49 01 ec add %rbp,%r12
* 2a: 4c 89 e6 mov %r12,%rsi <-- trapping instruction
2d: e8 6f d5 10 00 callq 0x10d5a1
32: 4d 85 e4 test %r12,%r12
35: 48 b8 ff ff ff ff ff movabs $0x7fffffffffffffff,%rax
3c: ff ff 7f
3f: 78 .byte 0x78