rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P10836/1:b..l
	(detected by 1, t=10502 jiffies, g=38641, q=68)
task:syz.1.1326      state:R  running task     stack:25208 pid:10836 ppid:  8263 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6777
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:681
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:209
Code: 8b 15 25 ea 81 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 34 16 00 00 00 74 2c 8b 91 10 16 00 00 83 fa 02 75 21 <48> 8b 91 18 16 00 00 48 8b 32 48 8d 7e 01 8b 89 14 16 00 00 48 39
RSP: 0018:ffffc9000490fef0 EFLAGS: 00000246
RAX: ffffffff8154b1dc RBX: 0000000000000001 RCX: ffff88801f3f8000
RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88802b233400 R08: ffffffff8154b1cf R09: fffffbfff2131821
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888064401528 R15: ffff888063150000
 __task_pid_nr_ns+0x1dc/0x420 kernel/pid.c:500
 task_tgid_vnr include/linux/sched.h:1587 [inline]
 __do_sys_getpid+0x19/0x20 kernel/sys.c:945
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdd066adce7
RSP: 002b:00007fdd0451ec48 EFLAGS: 00000206 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007fdd0451edb0 RCX: 00007fdd066adce7
RDX: 00007fdd0451ec80 RSI: 00007fdd0451edb0 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000206 R12: 0000000000000073
R13: 00007fdd0451feb0 R14: 9999999999999999 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10514 jiffies! g38641 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:25272 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
 schedule+0x11b/0x1f0 kernel/sched/core.c:6456
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2bf/0x1080 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2145
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </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: 10837 Comm: syz.2.1327 Not tainted 5.15.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline]
RIP: 0010:lock_acquire+0xd6/0x4f0 kernel/locking/lockdep.c:5594
Code: 83 fb 08 0f 83 e2 02 00 00 89 d8 c1 e8 06 48 8d 3c c5 e8 86 0a 8e be 08 00 00 00 e8 94 a1 67 00 89 d8 48 0f a3 05 f2 b8 a7 0c <73> 0d e8 83 6b 08 00 84 c0 0f 84 b9 02 00 00 48 c7 c0 94 ba 0a 8e
RSP: 0018:ffffc9000314f860 EFLAGS: 00000057
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8162cdec
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e0a86e8
RBP: ffffc9000314f9a8 R08: dffffc0000000000 R09: fffffbfff1c150de
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000629f14
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  000055558f70b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4973694000 CR3: 000000007c892000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
 _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
 spin_lock_irq include/linux/spinlock.h:388 [inline]
 __set_current_blocked+0x11b/0x2f0 kernel/signal.c:3086
 set_current_blocked kernel/signal.c:3072 [inline]
 signal_delivered kernel/signal.c:2936 [inline]
 signal_setup_done+0x397/0x5f0 kernel/signal.c:2947
 handle_signal arch/x86/kernel/signal.c:842 [inline]
 arch_do_signal_or_restart+0x14a1/0x1890 arch/x86/kernel/signal.c:869
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4975cb6460
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d aa 15 08 00 e8 25 90 f8 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007ffe2acbb738 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f4975ea72d8 RCX: 00007f4975c45347
RDX: 00007ffe2acbb740 RSI: 00007ffe2acbb870 RDI: 0000000000000021
RBP: 00007f4975ea724c R08: 00007f4975ea6fa0 R09: 00007ffe2acbc157
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f4975ea7240 R14: 0000000000000003 R15: 00000000000014ae
 </TASK>