rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=9353, q=190 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294956405-4294945902), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g9353 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:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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: 5785 Comm: syz-executor179 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:check_preemption_disabled+0x56/0x110 lib/smp_processor_id.c:19
Code: 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 74 cc 65 4c 8b 3d 86 ca 7f 75 41 f6
RSP: 0018:ffffc900042b7a78 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802accda00 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffffffff8acad840 RDI: ffffffff8b1c7be0
RBP: 00000000ffffffff R08: ffffc900042b7cdf R09: 0000000000000000
R10: ffffc900042b7cc0 R11: fffff52000856f9c R12: dffffc0000000000
R13: 0000000000000246 R14: ffffffff8d131e00 R15: 00000000ffffffff
FS:  00007f3763cb76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000002b5d5000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
 lock_is_held_type+0x79/0x190 kernel/locking/lockdep.c:5824
 lock_is_held include/linux/lockdep.h:288 [inline]
 __might_resched+0x9f/0x5f0 kernel/sched/core.c:10173
 __might_fault+0x71/0x120 mm/memory.c:5966
 rseq_get_rseq_cs_ptr_val kernel/rseq.c:161 [inline]
 rseq_get_rseq_cs kernel/rseq.c:183 [inline]
 rseq_ip_fixup kernel/rseq.c:303 [inline]
 __rseq_handle_notify_resume+0x14b/0x1140 kernel/rseq.c:351
 rseq_handle_notify_resume include/linux/sched.h:2376 [inline]
 rseq_signal_deliver include/linux/sched.h:2384 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:212 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x3d2/0x7b0 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3763cd8717
Code: 00 85 c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 00 00 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 d0 ff ff ff f7 d8 64 89
RSP: 002b:00007f3763cb7178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f3763d88b28 RCX: 00007f3763cd8719
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3763d88b28
RBP: 00007f3763d88b20 R08: 00007f3763cb7cdc R09: 00007f3763cb7cdc
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3763d88b2c
R13: 0000000000000000 R14: 00007ffc2e1ee740 R15: 00007ffc2e1ee828
 </TASK>