rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=1edc/1/0x4000000000000000 softirq=15441/15442 fqs=4682
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1030655          0            0
rcu: 	cputime:    25605      26883           94   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=6773 q=3465 ncpus=2)
CPU: 1 UID: 0 PID: 6188 Comm: syz.1.92 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e #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:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 62 2c f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001e0580 EFLAGS: 00000206
RAX: 673c652b1e3c0d00 RBX: 1ffff9200003c0b8 RCX: 673c652b1e3c0d00
RDX: 0000000000000000 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: ffffc900001e0678 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f2641a4a6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ff5ffff CR3: 000000010f6ac000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kfree+0x18e/0x440
 rcu_core+0xca8/0x1710
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_get_return_address+0x6a/0x90
Code: e8 fb a2 b0 00 48 8b 3b e8 93 a3 1a 00 85 c0 74 14 43 80 3c 37 00 74 08 48 89 df e8 e0 a2 b0 00 48 8b 03 eb 02 31 c0 5b 41 5e <41> 5f e9 3f ba fe 09 cc 89 d9 80 e1 07 80 c1 03 38 c1 7c a8 48 89
RSP: 0018:ffffc90004e6f8b8 EFLAGS: 00000246
RAX: ffffffff84745624 RBX: ffffc90004e6f980 RCX: 673c652b1e3c0d00
RDX: 0000000000000001 RSI: ffffffff8db86553 RDI: ffffffff84745624
RBP: ffffc90004e6f950 R08: ffffc90004e6fcb8 R09: 0000000000000000
R10: ffffc90004e6f918 R11: fffff520009cdf25 R12: ffff888106af9cc0
R13: ffff8881073a6c00 R14: ffffffff81ad0050 R15: 1ffff920009cdf22
 arch_stack_walk+0xfc/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 security_file_alloc+0x34/0x330
 init_file+0x93/0x2f0
 alloc_empty_file+0x6e/0x1d0
 alloc_file_pseudo+0x13d/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: 0033:0x7f2640b8e9a9
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:00007f2641a4a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f2640db5fa0 RCX: 00007f2640b8e9a9
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000010
RBP: 00007f2640c10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2640db5fa0 R15: 00007fff95989b88
 </TASK>
sched: DL replenish lagged too much
