rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=f3dc/1/0x4000000000000000 softirq=10098/10101 fqs=4608
	(t=10500 jiffies g=10609 q=13483 ncpus=2)
CPU: 1 PID: 4426 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:lock_release+0x6/0x910 kernel/locking/lockdep.c:5670
Code: 80 c1 03 38 c1 0f 8c db f8 ff ff 48 89 df e8 b1 90 6d 00 e9 ce f8 ff ff bb 2f 00 00 00 e9 e4 f8 ff ff 66 90 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00 00 00 48 89 74 24
RSP: 0018:ffffc90003417a88 EFLAGS: 00000282
RAX: 700c9cad1b590400 RBX: 0000000000000340 RCX: 700c9cad1b590400
RDX: 0000000000000000 RSI: ffffffff81beb1f6 RDI: ffff888078c22e58
RBP: ffffc90003417a90 R08: dffffc0000000000 R09: fffffbfff211964f
R10: fffffbfff211964f R11: 1ffffffff211964e R12: dffffc0000000000
R13: ffff88807e6f1950 R14: 00007ffc303ff940 R15: 00007ffc303ff940
FS:  0000555579876500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000075548000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __copy_to_user include/linux/uaccess.h:111 [inline]
 save_xstate_epilog arch/x86/kernel/fpu/signal.c:127 [inline]
 copy_fpstate_to_sigframe+0xa53/0xcb0 arch/x86/kernel/fpu/signal.c:245
 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:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f837b78f749
Code: 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 01 48
RSP: 002b:00007ffc303ffd18 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f837b9e5fa8 RCX: 00007f837b78f749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f837b9e5fac
RBP: 0000000000000000 R08: 0030dc23e26e0096 R09: 000000073040000f
R10: 0000000000000005 R11: 0000000000000246 R12: 00007f837b9e5fac
R13: 00007f837b9e5fa0 R14: 0000000000000095 R15: 0000000000000003
 </TASK>