rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=625c/1/0x4000000000000000 softirq=96330/96332 fqs=4596
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1038045          0            0
rcu: 	cputime:    23997      28481           83   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=87849 q=2502 ncpus=2)
CPU: 0 UID: 0 PID: 21465 Comm: syz.3.4360 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10 #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+0xc0/0x4c0
Code: 00 00 66 42 c7 44 2b 09 00 00 42 c6 44 2b 0b 00 65 48 8b 05 72 e8 f2 10 48 3b 84 24 a0 00 00 00 0f 85 65 03 00 00 48 8d 65 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 51 95 cb 09 cc 49 89 ff 48 c7 84
RSP: 0018:ffffc900000076b0 EFLAGS: 00000246
RAX: a5e4f3123a2fbc00 RBX: 1ffff92000000ec4 RCX: a5e4f3123a2fbc00
RDX: 0000000000000002 RSI: ffffffff8d9792e3 RDI: ffffffff8be30a00
RBP: ffffc900000076d8 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffffffff8e141800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f8f6aadc6c0(0000) GS:ffff8880b8680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000018c0 CR3: 000000001bad0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 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:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 cb 8e fc 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000780fb00 EFLAGS: 00000206
RAX: a5e4f3123a2fbc00 RBX: 0000000000000000 RCX: a5e4f3123a2fbc00
RDX: 0000000000000001 RSI: ffffffff8db6608d RDI: ffffffff8be30a00
RBP: ffffffff822acbeb R08: 0000000000000000 R09: ffffffff822acbeb
R10: 000000000000000a R11: ffffffff81ac3450 R12: 0000000000000000
R13: ffff88804b03b4c0 R14: 0000000000000001 R15: 0000000000000246
 obj_cgroup_charge_account+0x15b/0x660
 __memcg_slab_post_alloc_hook+0x3e6/0x7f0
 kmem_cache_alloc_noprof+0x2bf/0x3c0
 alloc_empty_file+0x55/0x1d0
 alloc_file_pseudo+0x13d/0x210
 sock_alloc_file+0xb8/0x2e0
 __sys_socketpair+0x2db/0x560
 __x64_sys_socketpair+0x9b/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f69b8ebe9
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:00007f8f6aadc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f8f69db5fa0 RCX: 00007f8f69b8ebe9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f8f69c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000200 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8f69db6038 R14: 00007f8f69db5fa0 R15: 00007ffc806601b8
 </TASK>
