rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=25d4/1/0x4000000000000000 softirq=18808/18910 fqs=4699
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1032826        359            0
rcu: 	cputime:    25385      27092           93   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=7837 q=23111 ncpus=2)
CPU: 0 UID: 0 PID: 6459 Comm: syz.4.181 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 2a 2d f6 48 89 df e8 72 c1 2d f6 e8 dd 92 56 f6 fb bf 01 00 00 00 <e8> 42 c1 1f f6 65 8b 05 1b f9 2e 07 85 c0 74 07 5b e9 81 4c 00 00
RSP: 0018:ffffc90000007c90 EFLAGS: 00000286
RAX: a4de6fa0f0a0da00 RBX: ffff88804b025940 RCX: a4de6fa0f0a0da00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc90000007e10 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffff88804b025940
R13: 1ffff92000000fac R14: ffff88801ecf0c10 R15: ffffc90000007d60
FS:  00007fce379cd6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000111092000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __run_timer_base+0x60a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 5b 22 21 f6 e8 96 f5 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc900046dfbe0 EFLAGS: 00000282
RAX: a4de6fa0f0a0da00 RBX: 0000000000000000 RCX: a4de6fa0f0a0da00
RDX: 0000000000000000 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc900046dfc90 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920008dbf7c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:mntget+0x0/0x60
Code: fc ff ff 4c 89 ff e8 8f 56 e6 ff e9 cc fc ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 41 56 53 48 89 fb e8 f1 32 83 ff 48 85 db 74 30 e8 e7
RSP: 0018:ffffc900046dfd58 EFLAGS: 00000282
RAX: ffff88811543fa70 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc900250e3000 RSI: 0000000000000af8 RDI: ffff888100af2a20
RBP: ffffc900046dfe30 R08: ffff88811543fba7 R09: 0000000000000000
R10: ffff88811543fb80 R11: 0000000000000000 R12: ffff888100af2a20
R13: ffffffff8f7ee7b0 R14: 1ffff920008dbfb0 R15: ffff888101284000
 alloc_file_pseudo+0xe2/0x210
 sock_alloc_file+0xb8/0x2e0
 __sys_socket+0x13d/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce36b8eb69
Code: 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 01 48
RSP: 002b:00007fce379cd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fce36db5fa0 RCX: 00007fce36b8eb69
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000002b
RBP: 00007fce36c11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fce36db5fa0 R15: 00007ffe903adf38
 </TASK>
sched: DL replenish lagged too much
