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WARNING: CPU: 2 PID: 0 at kernel/rcu/tree_stall.h:826 rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:818
Modules linked in:
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 kernel/rcu/tree_stall.h:826
Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 a0 e4 77 90 e8 8e 80 58 00 b8 01 00 00 00 87 05 13 ad 17 0f 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd 00 f8 f7 8b 48 c7 c3 8c 81 c9 8d 74 58 48 b8 00 00
RSP: 0018:ffffc90000570e30 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000100009def RCX: ffffffff81603782
RDX: fffffbfff20efc94 RSI: 0000000000000004 RDI: ffffffff9077e4a0
RBP: ffffffff8bf7f800 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff20efc94 R11: 1ffff11005986cce R12: 1ffffffff1781e30
R13: 0000000000000246 R14: ffff88802cc36592 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a276c5fd10 CR3: 00000000169ba000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_check_gp_start_stall kernel/rcu/tree_stall.h:789 [inline]
 rcu_core+0x4df/0x13b0 kernel/rcu/tree.c:2788
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:default_idle+0xe/0x10 arch/x86/kernel/process.c:701
Code: ff ff ff 48 89 df e8 b1 f0 9e f8 e9 52 ff ff ff 4c 89 e7 e8 a4 f0 9e f8 eb 93 66 90 e9 07 00 00 00 0f 00 2d d4 3d 4c 00 fb f4 <c3> cc 41 55 41 54 55 48 89 fd 53 e8 b2 4d 5a f8 e8 ed 5b fd ff 48
RSP: 0018:ffffc9000045fdf8 EFLAGS: 00000202
RAX: 0000000000374ee5 RBX: ffff888011c6a0c0 RCX: ffffffff891714f1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000001 R09: ffff88802cc366cb
R10: ffffed1005986cd9 R11: 0000000000000000 R12: ffffed100238d418
R13: 0000000000000002 R14: ffffffff8dc94ed0 R15: 0000000000000000
 default_idle_call+0x87/0xd0 kernel/sched/idle.c:112
 cpuidle_idle_call kernel/sched/idle.c:194 [inline]
 do_idle+0x401/0x590 kernel/sched/idle.c:306
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
 start_secondary+0x274/0x350 arch/x86/kernel/smpboot.c:272
 secondary_startup_64_no_verify+0xb0/0xbb