rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19856/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=154241, q=530 ncpus=2)
task:syz-executor.3  state:R  running task     stack:26992 pid:19856 tgid:19856 ppid:19268  flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6746
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7068
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 ca 9f 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000348fe08 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000691fc3 RCX: 00000000d439196c
RDX: 0000000000000001 RSI: ffffffff8b0cb100 RDI: ffffffff8b6f5720
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff27bb030
R10: ffffffff93dd8187 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d7b0e20 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:781 [inline]
 __task_pid_nr_ns+0x3f/0x500 kernel/pid.c:510
 task_tgid_vnr include/linux/pid.h:294 [inline]
 __do_sys_getpid+0x1d/0x30 kernel/sys.c:960
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4defe7b627
RSP: 002b:00007ffca39eaac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007ffca39eac30 RCX: 00007f4defe7b627
RDX: 00007ffca39eab00 RSI: 00007ffca39eac30 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000001 R09: 00007ffca39eb0b0
R10: 00007ffca39eb210 R11: 0000000000000202 R12: 00000000000e5337
R13: 00000000000e5305 R14: 00007ffca39eb230 R15: 00007f4defe34cb0
 </TASK>
rcu: rcu_preempt kthread starved for 10518 jiffies! g154241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27664 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6838
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 19888 Comm: syz-executor.0 Not tainted 6.9.0-rc4-syzkaller-00266-g977b1ef51866 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0033:0x7ff7572a5630
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a 9a 04 00 e8 35 78 fa 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:00007ffc94127178 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000032 RCX: 00007ff75727dea9
RDX: 00007ffc94127180 RSI: 00007ffc941272b0 RDI: 0000000000000021
RBP: 00007ff7573abf8c R08: 0000000000000001 R09: 00007ffc94127730
R10: 00007ffc94127890 R11: 0000000000000246 R12: 00000000000e53b3
R13: 00000000000e5381 R14: 00007ffc941278b0 R15: 00007ff757234cb0
FS:  0000555565930480 GS:  0000000000000000