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WARNING: CPU: 1 PID: 14 at kernel/rcu/tasks.h:901 trc_read_check_handler+0x248/0x2e0 kernel/rcu/tasks.h:920
Modules linked in:
CPU: 1 PID: 14 Comm: rcu_preempt Not tainted 5.15.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:trc_read_check_handler+0x248/0x2e0 kernel/rcu/tasks.h:901
Code: 48 c1 ea 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 0c 84 c0 74 08 4c 89 e7 e8 44 7b 5c 00 c6 83 21 04 00 00 01 e9 5a fe ff ff <0f> 0b 31 c9 ba 01 00 00 00 be 03 00 00 00 48 c7 c7 80 f6 97 8b e8
RSP: 0018:ffffc90000dc0f78 EFLAGS: 00010047
RAX: 0000000000000001 RBX: ffff888011ef9c80 RCX: ffffffff81610200
RDX: fffffbfff204b384 RSI: 0000000000000004 RDI: ffffffff90259c20
RBP: ffff888011ef9c80 R08: 0000000000000001 R09: 0000000000000003
R10: fffffbfff204b384 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b9c32ac8
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005630c012d688 CR3: 0000000036188000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 flush_smp_call_function_queue+0x34b/0x640 kernel/smp.c:663
 __sysvec_call_function_single+0x95/0x3d0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x8e/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:646
RIP: 0010:get_lock_parent_ip include/linux/ftrace.h:855 [inline]
RIP: 0010:preempt_latency_start kernel/sched/core.c:5381 [inline]
RIP: 0010:preempt_latency_start kernel/sched/core.c:5378 [inline]
RIP: 0010:preempt_count_add+0x67/0x140 kernel/sched/core.c:5406
Code: b2 7e 85 d2 75 11 65 8b 05 c6 4a b2 7e 0f b6 c0 3d f4 00 00 00 7f 64 65 8b 05 b5 4a b2 7e 25 ff ff ff 7f 39 c3 74 03 5b 5d c3 <48> 8b 5c 24 10 48 89 df e8 8c 03 0c 00 85 c0 75 35 65 48 8b 2c 25
RSP: 0018:ffffc90000d37dc8 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffffffff204b11c
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff8b989740 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000003 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffffff8b988f80 R14: 0000000000000004 R15: ffff888011ef9c80
 __raw_spin_lock include/linux/spinlock_api_smp.h:141 [inline]
 _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:154
 rcu_gp_init+0x3aa/0x12a0 kernel/rcu/tree.c:1788
 rcu_gp_kthread+0xab/0x320 kernel/rcu/tree.c:2120
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
   0:	b2 7e                	mov    $0x7e,%dl
   2:	85 d2                	test   %edx,%edx
   4:	75 11                	jne    0x17
   6:	65 8b 05 c6 4a b2 7e 	mov    %gs:0x7eb24ac6(%rip),%eax        # 0x7eb24ad3
   d:	0f b6 c0             	movzbl %al,%eax
  10:	3d f4 00 00 00       	cmp    $0xf4,%eax
  15:	7f 64                	jg     0x7b
  17:	65 8b 05 b5 4a b2 7e 	mov    %gs:0x7eb24ab5(%rip),%eax        # 0x7eb24ad3
  1e:	25 ff ff ff 7f       	and    $0x7fffffff,%eax
  23:	39 c3                	cmp    %eax,%ebx
  25:	74 03                	je     0x2a
  27:	5b                   	pop    %rbx
  28:	5d                   	pop    %rbp
  29:	c3                   	retq
* 2a:	48 8b 5c 24 10       	mov    0x10(%rsp),%rbx <-- trapping instruction
  2f:	48 89 df             	mov    %rbx,%rdi
  32:	e8 8c 03 0c 00       	callq  0xc03c3
  37:	85 c0                	test   %eax,%eax
  39:	75 35                	jne    0x70
  3b:	65                   	gs
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	2c 25                	sub    $0x25,%al