rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10500 ticks this GP) idle=b07c/1/0x4000000000000000 softirq=16357/16359 fqs=4989
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   972270          0            0
rcu: 	cputime:    24149      28340           94   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=7689 q=1289 ncpus=2)
CPU: 1 UID: 0 PID: 6040 Comm: syz.1.19 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_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 9b 93 56 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 c1 1f f6 65 8b 05 bc f9 2e 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e0c20 EFLAGS: 00000206
RAX: 55740760560a0400 RBX: 0000000000000a06 RCX: 55740760560a0400
RDX: 0000000000000002 RSI: ffffffff8d99873a RDI: 0000000000000001
RBP: ffffc900001e0ca0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: ffff88801fb25508 R14: ffff88802a129648 R15: 1ffff9200003c184
FS:  00007f60a57716c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f982e3fdfc8 CR3: 000000001e428000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 skb_dequeue+0x10e/0x150 net/core/skbuff.c:3897
 ieee80211_handle_queued_frames+0x4a/0x1f0 net/mac80211/main.c:434
 tasklet_action_common+0x36c/0x580 kernel/softirq.c:829
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7109
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:ffffc90001baf580 EFLAGS: 00000282
RAX: 55740760560a0400 RBX: 0000000000000000 RCX: 55740760560a0400
RDX: 0000000000000006 RSI: ffffffff8d99873a RDI: 0000000000000001
RBP: ffffc90001baf620 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000375eb0
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__anon_vma_interval_tree_insert mm/interval_tree.c:71 [inline]
RIP: 0010:anon_vma_interval_tree_insert+0x12e/0x3c0 mm/interval_tree.c:82
Code: 24 49 8b 5f 08 49 8b 47 50 48 89 04 24 49 2b 1f 48 c1 eb 0c 4d 89 ee 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 <74> 08 4c 89 ef e8 b8 76 1c 00 48 8b 04 24 4c 8d 3c 18 49 ff cf 49
RSP: 0018:ffffc90001baf6e0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000009 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff8880229f1830 RDI: ffff888109d42308
RBP: ffff888020ae4f50 R08: 00000000ffffffff R09: ffffffff822be439
R10: ffff888020ae4f50 R11: ffffffff81acf520 R12: ffff888020ae4f98
R13: ffff8880229f1830 R14: 1ffff1100453e306 R15: ffff888109d42300
 anon_vma_chain_link mm/rmap.c:157 [inline]
 anon_vma_clone+0x241/0x4f0 mm/rmap.c:298
 anon_vma_fork+0x79/0x500 mm/rmap.c:351
 dup_mmap+0x9eb/0x1ac0 mm/mmap.c:1801
 dup_mm kernel/fork.c:1477 [inline]
 copy_mm+0x13c/0x4b0 kernel/fork.c:1529
 copy_process+0x16d3/0x3b80 kernel/fork.c:2169
 kernel_clone+0x21e/0x870 kernel/fork.c:2599
 __do_sys_clone kernel/fork.c:2742 [inline]
 __se_sys_clone kernel/fork.c:2726 [inline]
 __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f60a498e9a9
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:00007f60a5770fe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f60a4bb5fa0 RCX: 00007f60a498e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000084005080
RBP: 00007f60a4a10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f60a4bb5fa0 R15: 00007ffce226bb08
 </TASK>
sched: DL replenish lagged too much
