------------[ cut here ]------------
WARNING: CPU: 1 PID: 13188 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 1 PID: 13188 Comm: syz.5.1561 Not tainted 6.6.95-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 e4 ee 96 be 04 00 00 00 e8 5a 21 6e 00 48 89 df b8 01 00 00 00 87 05 cc be 7e 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff c0 4f d3 8c 74 47 48 c7 c0 dc b2 4a 8e 48 c1 e8 03
RSP: 0018:ffffc900001f0c58 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8cd34fc0 RCX: ffffffff817025c6
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cd34fc0
RBP: ffffc900001f0ed0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2dddc94 R12: 0000000000002904
R13: 1ffff110171e7a6a R14: 0000000000000a06 R15: dffffc0000000000
FS:  00007fe6403406c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbb5bf7f2d8 CR3: 000000001ebce000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x612/0x1720 kernel/rcu/tree.c:2462
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 do_softirq+0xed/0x180 kernel/softirq.c:479
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x178/0x1c0 kernel/softirq.c:406
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline]
 restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:331 [inline]
 __fpu_restore_sig arch/x86/kernel/fpu/signal.c:359 [inline]
 fpu__restore_sig+0x920/0x10e0 arch/x86/kernel/fpu/signal.c:493
 restore_sigcontext arch/x86/kernel/signal_64.c:95 [inline]
 __ia32_sys_rt_sigreturn+0x65d/0x7b0 arch/x86/kernel/signal_64.c:266
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe63f58e929
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:00007fe6403400e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007fe63f7b5fa8 RCX: 00007fe63f58e929
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe63f7b5fa8
RBP: 00007fe63f7b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe63f7b5fac
R13: 0000000000000000 R14: 00007ffd14d38820 R15: 00007ffd14d38908
 </TASK>