rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 0, t=10502 jiffies, g=6857, q=64 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10497 (4294968175-4294957678), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10498 jiffies! g6857 f0x2 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:26256 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
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: 5135 Comm: syz-executor297 Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_apic_msr_eoi+0xf/0x20 arch/x86/include/asm/apic.h:214
Code: f8 e9 c0 6a 70 0a 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 97 6a 70 0a 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000a08fc0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90004ecfbc8 RCX: 000000000000080b
RDX: 0000000000000000 RSI: ffffffff8bc7a140 RDI: ffffffff8c1f80e0
RBP: 0000000000000000 R08: ffffffff8135c581 R09: 1ffffffff1f51ef5
R10: dffffc0000000000 R11: ffffc90000a08ff8 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 000055558f03c3c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 000000007524e000 CR4: 0000000000350ef0
Call Trace:
apic_eoi arch/x86/include/asm/apic.h:414 [inline]
__sysvec_apic_timer_interrupt+0x47/0x3f0 arch/x86/kernel/apic/apic.c:1047
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2a af e7 f5 48 89 df e8 42 ef e8 f5 e8 8d 49 12 f6 fb bf 01 00 00 00 32 b4 da f5 65 8b 05 d3 d7 78 74 85 c0 74 06 5b e9 0c 45 25 00
RSP: 0018:ffffc90004ecfc70 EFLAGS: 00000282
RAX: 6a176f633c75cd00 RBX: ffff888029a54a00 RCX: ffffffff9472d603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc90004ecfdb0 R08: ffffffff8fa8f7af R09: 1ffffffff1f51ef5
R10: dffffc0000000000 R11: fffffbfff1f51ef6 R12: 0000000000000021
R13: 1ffff1100534a9d3 R14: ffff888029a54e98 R15: ffff888029a54a00
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x14dd/0x1740 kernel/signal.c:2914
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79b73daa79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc4e27a7e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f79b73daa79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f79b743201d
R13: 00007ffc4e27a950 R14: 00007ffc4e27a870 R15: 00007ffc4e27a860
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.430 msecs