------------[ cut here ]------------
WARNING: CPU: 0 PID: 6754 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 0 PID: 6754 Comm: syz.0.238 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 f4 ee 96 be 04 00 00 00 e8 ba ac 6c 00 48 89 df b8 01 00 00 00 87 05 ac bc 7e 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 80 50 d3 8c 74 47 48 c7 c0 9c b4 4a 8e 48 c1 e8 03
RSP: 0018:ffffc90000007c58 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8cd35080 RCX: ffffffff817037e6
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cd35080
RBP: ffffc90000007ed0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2ddde94 R12: 0000000000002904
R13: 1ffff110171c7a22 R14: 0000000000000a06 R15: dffffc0000000000
FS:  00007f1d23cb46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd463e7dac CR3: 00000000751fe000 CR4: 00000000003506f0
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: 0033:0x7f1d22d8eec7
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:00007f1d23cb4038 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f1d22fe5fa0 RCX: 00007f1d22d8eec9
RDX: 00000000000000bc RSI: 0000200000000040 RDI: 0000000000000003
RBP: 00007f1d22e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d22fe6038 R14: 00007f1d22fe5fa0 R15: 00007ffd50f79b08
 </TASK>