------------[ cut here ]------------
WARNING: CPU: 1 PID: 14570 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: 14570 Comm: syz.6.2420 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 04 31 97 be 04 00 00 00 e8 1a e2 6d 00 48 89 df b8 01 00 00 00 87 05 dc 81 bf 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff c0 73 13 8d 74 47 48 c7 c0 9c 64 8b 8e 48 c1 e8 03
RSP: 0018:ffffc900001f0c58 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8d1373c0 RCX: ffffffff817182b6
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8d1373c0
RBP: ffffc900001f0ed0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2e62094 R12: 0000000000002904
R13: ffffffff8d1373c0 R14: 0000000000000a06 R15: dffffc0000000000
FS:  00007ff51a9426c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000058 CR3: 0000000063d2d000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 rcu_core+0x635/0x1770 kernel/rcu/tree.c:2462
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 do_softirq+0xfa/0x1a0 kernel/softirq.c:479
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x184/0x1c0 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+0x9d7/0x11c0 arch/x86/kernel/fpu/signal.c:493
 restore_sigcontext arch/x86/kernel/signal_64.c:95 [inline]
 __ia32_sys_rt_sigreturn+0x6e2/0x860 arch/x86/kernel/signal_64.c:266
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff51999ce57
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007ff51a9420e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007ff519c15fa8 RCX: 00007ff51999ce59
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff519c15fa8
RBP: 00007ff519c15fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff519c16038 R14: 00007ffd5e90f9b0 R15: 00007ffd5e90fa98
 </TASK>