------------[ cut here ]------------
WARNING: CPU: 1 PID: 5034 at kernel/rcu/tree_stall.h:984 rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:969
Modules linked in:
CPU: 1 PID: 5034 Comm: syz-executor827 Not tainted 6.4.0-rc4-syzkaller-00099-g1874a42a7d74 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:rcu_check_gp_start_stall+0x2c8/0x450 kernel/rcu/tree_stall.h:984
Code: c7 c7 00 31 b6 91 be 04 00 00 00 e8 d2 52 6e 00 b8 01 00 00 00 87 05 57 30 41 10 85 c0 0f 85 1c ff ff ff 48 c7 c0 80 c4 f2 8c <0f> 0b 49 39 c7 74 47 48 c7 c0 04 ff 55 8e 48 c1 e8 03 42 0f b6 04
RSP: 0018:ffffc900001e0bd8 EFLAGS: 00010046
RAX: ffffffff8cf2c480 RBX: 0000000100003258 RCX: ffffffff8175009e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff91b63100
RBP: ffffc900001e0e10 R08: dffffc0000000000 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8cf2c480
FS:  00007f109f238700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001030 CR3: 0000000074e43000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x64d/0x15f0 kernel/rcu/tree.c:2372
 __do_softirq+0x2ab/0x908 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x159/0x240 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 0e 31 2a f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> b3 db a5 f6 65 8b 05 24 97 4a 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90003d2f580 EFLAGS: 00000206
RAX: 2e506adf639cec00 RBX: 1ffff920007a5eb4 RCX: ffffffff816b826a
RDX: dffffc0000000000 RSI: ffffffff8aea8e20 RDI: 0000000000000001
RBP: ffffc90003d2f610 R08: dffffc0000000000 R09: fffffbfff2065061
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920007a5eb0 R14: ffffc90003d2f5a0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
 __wake_up_common_lock kernel/sched/wait.c:140 [inline]
 __wake_up_sync_key+0x125/0x1c0 kernel/sched/wait.c:208
 __unix_dgram_recvmsg+0x602/0x1260 net/unix/af_unix.c:2479
 sock_recvmsg_nosec+0x86/0xd0 net/socket.c:1019
 ____sys_recvmsg+0x475/0x570 net/socket.c:2720
 ___sys_recvmsg net/socket.c:2764 [inline]
 do_recvmmsg+0x471/0xad0 net/socket.c:2858
 __sys_recvmmsg net/socket.c:2937 [inline]
 __do_sys_recvmmsg net/socket.c:2960 [inline]
 __se_sys_recvmmsg net/socket.c:2953 [inline]
 __x64_sys_recvmmsg+0x199/0x240 net/socket.c:2953
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f109f2a7a79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f109f238308 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007f109f2a7a79
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f109f32f418 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 00007f109f32f410
R13: 00007f109f2fd074 R14: 00007f109f238400 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	9c                   	pushfq
   1:	8f 44 24 20          	popq   0x20(%rsp)
   5:	42 80 3c 23 00       	cmpb   $0x0,(%rbx,%r12,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 0e 31 2a f7       	callq  0xf72a3122
  14:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  19:	75 4e                	jne    0x69
  1b:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 b3 db a5 f6       	callq  0xf6a5dbe2 <-- trapping instruction
  2f:	65 8b 05 24 97 4a 75 	mov    %gs:0x754a9724(%rip),%eax        # 0x754a975a
  36:	85 c0                	test   %eax,%eax
  38:	74 3f                	je     0x79
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss