rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=0144/1/0x4000000000000000 softirq=17213/17214 fqs=5249
	(t=10502 jiffies g=18533 q=23407 ncpus=2)
CPU: 1 PID: 6001 Comm: syz.6.223 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:xsave_to_user_sigframe arch/x86/kernel/fpu/xstate.h:285 [inline]
RIP: 0010:copy_fpregs_to_sigframe arch/x86/kernel/fpu/signal.c:162 [inline]
RIP: 0010:copy_fpstate_to_sigframe+0x4fa/0xcb0 arch/x86/kernel/fpu/signal.c:231
Code: 00 4d 89 f5 49 c1 ed 20 4c 89 ff 4c 89 f6 31 d2 e8 db 40 00 00 0f 01 cb 4c 8b 7c 24 20 4c 89 ff 44 89 f0 44 89 ea 48 0f ae 27 <31> c0 41 89 c6 0f 01 ca 48 8b 84 24 88 00 00 00 42 0f b6 04 20 84
RSP: 0018:ffffc90003f6faa0 EFLAGS: 00040282
RAX: 0000000000000007 RBX: ffff88802acc8000 RCX: 0000000000080000
RDX: 0000000000000000 RSI: 000000000007ffff RDI: 00007f7c2f635d00
RBP: ffffc90003f6fc90 R08: dffffc0000000000 R09: ffffed1005599001
R10: ffffed1005599001 R11: 1ffff11005599000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000007 R15: 00007f7c2f635d00
FS:  00007f7c2f6366c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c2e9e5fa8 CR3: 0000000059586000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 get_sigframe arch/x86/kernel/signal.c:297 [inline]
 __setup_rt_frame arch/x86/kernel/signal.c:472 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:784 [inline]
 handle_signal arch/x86/kernel/signal.c:828 [inline]
 arch_do_signal_or_restart+0x622/0x1240 arch/x86/kernel/signal.c:873
 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:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7c2e78f747
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007f7c2f6360e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f7c2e9e5fa8 RCX: 00007f7c2e78f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7c2e9e5fa8
RBP: 00007f7c2e9e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c2e9e6038 R14: 00007ffee01fc290 R15: 00007ffee01fc378
 </TASK>
vkms_vblank_simulate: vblank timer overrun