rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=51637, q=54)
rcu: All QSes seen, last rcu_preempt kthread activity 10485 (4295017153-4295006668), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10486 jiffies! g51637 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:28096 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11bb/0x4390 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 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: 9936 Comm: syz.1.1353 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x3/0x20 arch/x86/include/asm/idtentry.h:676
Code: 00 00 90 90 90 90 90 0f 01 ca fc 6a ff e8 e5 03 00 00 48 89 c4 48 89 e7 e8 da 5b e9 ff e9 c5 04 00 00 90 90 90 90 90 0f 01 ca <fc> 6a ff e8 c5 03 00 00 48 89 c4 48 89 e7 e8 2a 5a e9 ff e9 a5 04
RSP: 0018:ffffc9000394faa8 EFLAGS: 00000802
RAX: 1ffff1100fa25a61 RBX: ffff88807d12bb80 RCX: ffff88807d12bb80
RDX: 0000000000000000 RSI: 0000000000000014 RDI: ffffffff8b9e60e0
RBP: 0000000000000014 R08: dffffc0000000000 R09: ffffed100fa25771
R10: ffffed100fa25771 R11: 1ffff1100fa25770 R12: dffffc0000000000
R13: ffff88807d12d308 R14: ffffffff8b9e60e0 R15: ffff88807d12d308
FS:  0000555567f35500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32415ff8 CR3: 000000007920d000 CR4: 00000000003506f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
RIP: 0010:pagefault_disabled include/linux/uaccess.h:259 [inline]
RIP: 0010:__might_fault+0x32/0x110 mm/memory.c:5352
Code: 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 44 f6 ca ff 65 48 8b 1d ec 99 55 7e 4c 8d bb 88 17 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 b2 00 00 00 45 8b 3f 31 ff 44 89 fe e8
RSP: 0018:ffffc9000394fad8 EFLAGS: 00000a02
 __clear_user+0x1f/0x70 arch/x86/lib/usercopy_64.c:20
 xsave_to_user_sigframe arch/x86/include/asm/fpu/internal.h:346 [inline]
 copy_fpregs_to_sigframe arch/x86/kernel/fpu/signal.c:141 [inline]
 copy_fpstate_to_sigframe+0x454/0xb90 arch/x86/kernel/fpu/signal.c:203
 get_sigframe arch/x86/kernel/signal.c:295 [inline]
 __setup_rt_frame arch/x86/kernel/signal.c:471 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:780 [inline]
 handle_signal arch/x86/kernel/signal.c:824 [inline]
 arch_do_signal_or_restart+0x67a/0x1300 arch/x86/kernel/signal.c:869
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8ebf78daf2
Code: 00 48 83 f8 fc 0f 84 10 0d 00 00 48 3d 77 1f 00 00 0f 87 19 11 00 00 48 c1 e0 04 48 8d 35 36 66 23 00 4c 01 f0 48 8b 44 c6 20 <48> 39 44 24 30 73 0d 48 0f af 05 97 0b eb 00 48 89 44 24 30 4c 89
RSP: 002b:00007ffd20f1dfa0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00007ffd20f1e068 RCX: ffffffffffffe0da
RDX: 0000000000001f25 RSI: 00007f8ebf9c4120 RDI: 00007ffd20f1e068
RBP: 00007f8ebfb10da0 R08: 0000001b31220000 R09: 000000000000007c
R10: 0000000000000000 R11: 0000000000000001 R12: 00007f8ebfb0f09c
R13: 00007ffd20f1e090 R14: 0000000000001f25 R15: 00007ffd20f1e0b0
 </TASK>