rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=7061, q=34 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294966143-4294955642), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g7061 f0x2 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:28256 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf12/0x5c60 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe9/0x280 kernel/sched/core.c:6817
 schedule_timeout+0x137/0x2a0 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x1ec/0xb20 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1862
 kthread+0x2c6/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5104 Comm: syz-executor731 Not tainted 6.8.0-rc2-syzkaller-00397-g56897d51886f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_region_inline mm/kasan/generic.c:174 [inline]
RIP: 0010:kasan_check_range+0x1b/0x1a0 mm/kasan/generic.c:189
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 55 53 <0f> 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 b3
RSP: 0018:ffffc90000007a38 EFLAGS: 00000082
RAX: ffffffff93d45fc8 RBX: 0000000000000021 RCX: ffffffff8169c70e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff93d45fc0
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff27a8bfa
R10: ffffffff93d45fd7 R11: 0000000000000002 R12: ffff888079e06450
R13: ffffed100f3c0c7f R14: 00000000000000b1 R15: 0000000000000002
FS:  0000555555e3b3c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 00000000789f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228
 __lock_acquire+0x1395/0x3b40 kernel/locking/lockdep.c:5133
 reacquire_held_locks+0x20b/0x4c0 kernel/locking/lockdep.c:5279
 __lock_release kernel/locking/lockdep.c:5468 [inline]
 lock_release+0x33c/0x690 kernel/locking/lockdep.c:5774
 rcu_lock_release include/linux/rcupdate.h:308 [inline]
 rcu_read_unlock include/linux/rcupdate.h:783 [inline]
 __lock_task_sighand+0x146/0x340 kernel/signal.c:1418
 lock_task_sighand include/linux/sched/signal.h:748 [inline]
 send_sigqueue+0x1d5/0x850 kernel/signal.c:1987
 posix_timer_event kernel/time/posix-timers.c:298 [inline]
 posix_timer_fn+0x181/0x3e0 kernel/time/posix-timers.c:324
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x203/0xc30 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x400 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
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 8b 74 24 08 48 89 fb 48 83 c7 18 e8 ea a7 a3 f6 48 89 df e8 d2 22 a4 f6 e8 5d 50 cb f6 fb bf 01 00 00 00 <e8> 82 6f 95 f6 65 8b 05 f3 bd 3c 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900034ffcf8 EFLAGS: 00000202
RAX: 0000000003a8f13b RBX: ffff8880298c4a00 RCX: 1ffffffff1f3a311
RDX: 0000000000000000 RSI: ffffffff8b0cb240 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f9d4b17 R11: 0000000000000000 R12: ffff8880298c4e98
R13: 0000000000000021 R14: ffff8880298c4e00 R15: 1ffff9200069ffae
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x189d/0x2790 kernel/signal.c:2896
 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212
 do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fa8505d2e79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 18 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:00007ffd788912e8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fa8505d2e79
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000555555e3b370
R13: 0000000000000003 R14: 00007ffd78891360 R15: 00007ffd78891350
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.222 msecs