rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=8297, q=780 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955712-4294945210), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g8297 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:26728 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 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+0x313/0x1590 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: 5901 Comm: syz.1.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:INIT_LIST_HEAD include/linux/list.h:38 [inline]
RIP: 0010:list_del_init include/linux/list.h:288 [inline]
RIP: 0010:collect_signal kernel/signal.c:596 [inline]
RIP: 0010:__dequeue_signal+0x3a1/0x680 kernel/signal.c:626
Code: 48 89 e8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 ef e8 e3 0a 8b 00 48 89 6d 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 <74> 05 e8 c8 0a 8b 00 48 89 6d 08 48 8d 75 18 ba 30 00 00 00 4c 89
RSP: 0018:ffffc90004cefbd8 EFLAGS: 00000046
RAX: 1ffff1100f1025cf RBX: 0000000000000021 RCX: dffffc0000000000
RDX: ffffc9000cd29000 RSI: 000000000007ffff RDI: ffff888078812e78
RBP: ffff888078812e70 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200099df70 R12: ffffc90004cefe00
R13: 1ffff11004851881 R14: dffffc0000000000 R15: ffff88802428c3f8
FS:  00007f3482c4b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 000000002450b000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 dequeue_signal+0xe9/0x4b0 kernel/signal.c:649
 get_signal+0x551/0x13f0 kernel/signal.c:2782
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 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: 0033:0x7f3481d9ce57
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007f3482c4b028 EFLAGS: 00000246
RAX: 0000000000000049 RBX: 00007f3482015fa0 RCX: 00007f3481d9ce59
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003
RBP: 00007f3481e32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3482016038 R14: 00007f3482015fa0 R15: 00007ffffddd2e58
 </TASK>