rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=5501, q=216)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294954035-4294943535), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g5501 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:28192 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x29e/0x11b0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x98/0x350 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 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: 4206 Comm: syz-executor358 Not tainted 5.15.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
RIP: 0010:rcu_is_watching+0x56/0xa0 kernel/rcu/tree.c:1123
Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 40 9f 59 00 48 c7 c3 c8 b2 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 2b 8b 03 65 ff 0d c5 c2 9e 7e 74 08 24 01 5b 41 5e 41 5f
RSP: 0018:ffffc9000304fd40 EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff8880b903b2c8 RCX: 2b52f08aef158d00
RDX: 0000000000000000 RSI: ffffffff8a59afe0 RDI: ffffffff8a59afa0
RBP: ffffc9000304fe80 R08: dffffc0000000000 R09: fffffbfff1ad3046
R10: fffffbfff1ad3046 R11: 1ffffffff1ad3045 R12: ffff888076660728
R13: 1ffff92000609fb8 R14: ffffffff8bbc1820 R15: dffffc0000000000
FS:  000055556da9b3c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04006ed8b0 CR3: 0000000072243000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xcd/0x3f0 kernel/locking/lockdep.c:5594
 do_write_seqcount_begin_nested include/linux/seqlock.h:519 [inline]
 do_write_seqcount_begin include/linux/seqlock.h:545 [inline]
 vtime_user_enter+0x96/0x2d0 kernel/sched/cputime.c:715
 __context_tracking_enter+0x60/0x90 kernel/context_tracking.c:82
 user_enter_irqoff include/linux/context_tracking.h:41 [inline]
 __exit_to_user_mode kernel/entry/common.c:136 [inline]
 syscall_exit_to_user_mode+0x3c/0x40 kernel/entry/common.c:309
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f04006d45c7
Code: 0b e9 68 fe ff ff 48 83 c4 18 48 8d 3d 92 5b 09 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 c3 c9 fd ff 0f 1f 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007fff4abc5108 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: 0000000000000003 RBX: 00007fff4abc5270 RCX: 00007f04006d45c7
RDX: 00007fff4abc5140 RSI: 00007fff4abc5270 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007fff4abc5720 R09: 00007fff4abc5720
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f040075e488
R13: 00007fff4abc570c R14: 0000000000000000 R15: 431bde82d7b634db
 </TASK>