rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10498 ticks this GP) idle=ca0c/1/0x4000000000000000 softirq=16020/16020 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1040379          1            0
rcu: 	cputime:    24794      27705           87   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=8137 q=2514 ncpus=2)
CPU: 0 UID: 0 PID: 6594 Comm: syz.2.316 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: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 92 37 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:ffffc90000007ae0 EFLAGS: 00000206
RAX: 5ac9eef10cf81e00 RBX: 1ffff92000000f64 RCX: 5ac9eef10cf81e00
RDX: 0000000000000002 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: ffffc90000007be0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f75602766c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010ebb4000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 ieee80211_rx_napi+0x228/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 tasklet_action_common+0x36c/0x580
 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: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:ffffc900081076a0 EFLAGS: 00000286
RAX: 5ac9eef10cf81e00 RBX: 0000000000000000 RCX: 5ac9eef10cf81e00
RDX: 0000000000000006 RSI: ffffffff8d998701 RDI: 0000000000000001
RBP: ffffc90008107740 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001020ed4
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:static_key_count+0x35/0x70
Code: ca ff 48 89 df be 04 00 00 00 e8 16 e9 2d 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 1f 8b 1b <bf> ff ff ff ff 89 de e8 1f c7 ca ff 85 db b8 01 00 00 00 0f 49 c3
RSP: 0018:ffffc90008107800 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff99c5c5c0
RBP: 0000000000000000 R08: ffffffff99c5c5c3 R09: 1ffffffff338b8b8
R10: dffffc0000000000 R11: fffffbfff338b8b9 R12: dffffc0000000000
R13: ffff888020993ed8 R14: ffff88802b971e00 R15: 0000000000000000
 security_vm_enough_memory_mm+0x109/0x4f0
 shmem_inode_acct_blocks+0xd9/0x470
 shmem_alloc_and_add_folio+0x8bc/0xf60
 shmem_get_folio_gfp+0x59d/0x1660
 shmem_write_begin+0xf7/0x2b0
 generic_perform_write+0x2c7/0x910
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x54b/0xa90
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f755f38eb69
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:00007f7560276038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f755f5b5fa0 RCX: 00007f755f38eb69
RDX: 000000000000fe33 RSI: 00002000000004c0 RDI: 0000000000000007
RBP: 00007f755f411df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f755f5b5fa0 R15: 00007ffc848f5288
 </TASK>
sched: DL replenish lagged too much
