rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=e144/1/0x4000000000000000 softirq=19688/19688 fqs=4926
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   908156          1            0
rcu: 	cputime:    25147      27332          101   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=12869 q=2819 ncpus=2)
CPU: 1 UID: 0 PID: 7278 Comm: syz.2.613 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:get_random_u32+0x4e7/0x940
Code: e3 00 02 00 00 75 7e e8 c7 f5 75 fc 48 8b 5c 24 28 4d 85 ff 75 07 e8 b8 f5 75 fc eb 06 e8 b1 f5 75 fc fb 8b 84 24 00 01 00 00 <48> c7 44 24 40 0e 36 e0 45 42 c7 04 23 00 00 00 00 4a c7 44 23 0c
RSP: 0018:ffffc900001e0920 EFLAGS: 00000246
RAX: 00000000cce91c9f RBX: 1ffff9200003c12c RCX: ffff888022710000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0a88 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 0000000000000002 R14: ffff888136636230 R15: 0000000000000200
FS:  00007fa7cbe696c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4d4260000 CR3: 0000000107a8c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rfc3315_s14_backoff_update+0x14/0xc0
 addrconf_rs_timer+0x3bc/0x670
 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_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+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:ffffc900030df200 EFLAGS: 00000286
RAX: 762502fa3b10c100 RBX: 0000000000000000 RCX: 762502fa3b10c100
RDX: 0000000000000006 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc900030df2b0 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200061be40
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:rcu_is_watching+0x70/0xb0
Code: c3 98 3f a1 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 99 ee f8 10 74 11 83 e0 04 c1 e8 02 5b <41> 5e 41 5f c3 cc cc cc cc cc e8 01 85 8c ff eb e8 48 c7 c7 00 4e
RSP: 0018:ffffc900030df370 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff888108f2bd70 RCX: 762502fa3b10c100
RDX: 0000000000000000 RSI: ffffffff8be29f60 RDI: ffffffff8be29f20
RBP: dffffc0000000000 R08: ffff888022710000 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88811898f200
R13: ffffffff8208fa94 R14: ffffffff8dbbec78 R15: dffffc0000000000
 lock_release+0x4b/0x3e0
 up_write+0x2d/0x420
 lock_mm_and_find_vma+0x1d4/0x300
 do_user_addr_fault+0x331/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x51/0x90
Code: 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 eb 05 c3 cc cc cc cc <48> 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01
RSP: 0018:ffffc900030df618 EFLAGS: 00010202
RAX: ffffffff84bf1a01 RBX: ffff88811b00228e RCX: 0000000000000d72
RDX: 0000000000000001 RSI: 00007ff4d4260000 RDI: ffff88811b00228e
RBP: ffffc900030df780 R08: ffff88811b002fff R09: 1ffff110236005ff
R10: dffffc0000000000 R11: ffffed1023600600 R12: dffffc0000000000
R13: 0000000000000000 R14: 00007ffffffff000 R15: 0000000000000d72
 _copy_from_iter+0x484/0x16f0
 copy_page_from_iter+0xdd/0x170
 skb_copy_datagram_from_iter+0x306/0x720
 unix_stream_sendmsg+0x5a1/0xc90
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa7caf8eb69
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:00007fa7cbe69038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa7cb1b6080 RCX: 00007fa7caf8eb69
RDX: 0000000000000000 RSI: 0000200000000b00 RDI: 0000000000000009
RBP: 00007fa7cb011df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa7cb1b6080 R15: 00007ffc97768088
 </TASK>
sched: DL replenish lagged too much
