rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=2594/1/0x4000000000000000 softirq=17682/17684 fqs=4959
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1096506          0            0
rcu: 	cputime:    24945      27534           84   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=9729 q=4493 ncpus=2)
CPU: 0 UID: 0 PID: 6465 Comm: syz.1.170 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:__tcp_transmit_skb+0x21c0/0x3680
Code: 8b 7c 24 30 48 8d 5f 0e 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 f0 10 00 00 66 44 89 33 44 8b 74 24 1c e9 ab f3 ff ff <48> 81 fb a0 fe ec 89 0f 85 a7 0d 00 00 e8 9e 50 d4 f7 4c 89 ff 4c
RSP: 0018:ffffc900000076a0 EFLAGS: 00000287
RAX: 1ffffffff1939ee5 RBX: ffffffff89ecfea0 RCX: ffff888027eb3980
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007890 R08: ffff88803a760143 R09: 1ffff110074ec028
R10: dffffc0000000000 R11: ffffed10074ec029 R12: ffff88802583c0f0
R13: dffffc0000000000 R14: 0000000000000020 R15: ffff88803a760000
FS:  00007f65020ce6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f65020add58 CR3: 000000002a166000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __tcp_retransmit_skb+0xa30/0x1530
 tcp_retransmit_skb+0x33/0x440
 tcp_retransmit_timer+0x190c/0x3370
 tcp_write_timer+0x162/0x2e0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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:__schedule+0x80/0x4d00
Code: fd 20 a5 8d 48 c7 84 24 10 01 00 00 70 5f 6f 8b 48 8d 8c 24 00 01 00 00 48 c1 e9 03 48 b8 f1 f1 f1 f1 04 f2 00 00 4a 89 04 29 <48> b8 f2 f2 f2 f2 f2 00 f2 f2 4a 89 44 29 09 42 c7 44 29 11 f2 00
RSP: 0018:ffffc900083978a0 EFLAGS: 00000a02
RAX: 0000f204f1f1f1f1 RBX: 0000000000000000 RCX: 1ffff92001072f34
RDX: 0000000000000000 RSI: ffffffff8d998836 RDI: ffffc90008397a30
RBP: ffffc90008397ab0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92001072f58
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:sched_mm_cid_remote_clear+0x3fa/0x4d0
Code: c7 20 6f 8a 8b be 66 03 00 00 48 c7 c2 c0 6f 8a 8b e8 fa 10 0b 00 48 c7 c7 e0 f0 13 8e 4c 89 fe e8 db f6 0a 00 e8 f6 8c 14 00 <48> c7 44 24 20 0e 36 e0 45 48 b8 00 00 00 00 00 fc ff df 48 c7 04
RSP: 0018:ffffc90008397c20 EFLAGS: 00000206
RAX: 04b59d900cd68f00 RBX: 1ffff92001072f88 RCX: 04b59d900cd68f00
RDX: 0000000000000000 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: ffffc90008397d10 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffc90008397cb0
R13: ffff88801f071d50 R14: 0000000000000001 R15: 0000000000000287
 task_mm_cid_work+0x4b8/0x760
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f650118e9a9
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:00007f65020ce038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 0000000000000000 RBX: 00007f65013b5fa0 RCX: 00007f650118e9a9
RDX: 0000000000000000 RSI: 0000200000000540 RDI: 0000000000000006
RBP: 00007f6501210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f65013b5fa0 R15: 00007fff42e6e668
 </TASK>
sched: DL replenish lagged too much
