rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=32777, q=1362 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294976669-4294966167), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g32777 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:28680 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5295 [inline]
 __schedule+0xfee/0x6020 kernel/sched/core.c:6907
 __schedule_loop kernel/sched/core.c:6989 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7004
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 UID: 0 PID: 12769 Comm: iou-sqp-12768 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:io_sqd_events_pending io_uring/sqpoll.c:171 [inline]
RIP: 0010:io_sq_thread+0x3a0/0x15f0 io_uring/sqpoll.c:337
Code: 4c 24 28 48 89 44 24 60 4c 89 e8 48 c1 e8 03 4c 01 f0 48 89 44 24 68 e8 ce 63 22 fd 48 8b 44 24 60 80 38 00 0f 85 20 11 00 00 <48> 8b 04 24 31 ff 48 8b 98 18 01 00 00 48 89 de e8 8b 5e 22 fd 48
RSP: 0018:ffffc9000cdd7ca8 EFLAGS: 00000246
RAX: ffffed100ef8dd23 RBX: 0000000000000000 RCX: ffffffff84e4b7fc
RDX: ffff88802e012480 RSI: ffffffff84e4afb2 RDI: ffff88802e012480
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88802e012480 R14: dffffc0000000000 R15: ffff888077c6e898
FS:  00007fe16b1a26c0(0000) GS:ffff88812438b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f32d073d9e8 CR3: 0000000055683000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>