rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10489 ticks this GP) idle=e644/1/0x4000000000000000 softirq=14324/14325 fqs=4554
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   986330          0            0
rcu: 	cputime:    26586      25893           89   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=6593 q=2494 ncpus=2)
CPU: 0 UID: 0 PID: 5994 Comm: syz.1.47 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:stack_trace_consume_entry+0x4/0x280
Code: 65 f0 5b 41 5e 5d e9 9b 6e c4 09 cc e8 e5 92 c1 09 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc900000075a0 EFLAGS: 00000286
RAX: ffffffff821904e7 RBX: ffffc90000007660 RCX: 53caf452f8610b00
RDX: 0000000000000001 RSI: ffffffff821904e7 RDI: ffffc90000007660
RBP: ffffc90000007630 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: ffffffff81acf520 R12: ffff8880220c8000
R13: ffff888024110e00 R14: ffffffff81acf520 R15: ffffc900000075a8
FS:  00007f79df7626c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000018000 CR3: 0000000112db4000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x110/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x670
 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_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110
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:ffffc9000460f380 EFLAGS: 00000206
RAX: 53caf452f8610b00 RBX: 0000000000000a02 RCX: 53caf452f8610b00
RDX: 0000000000000007 RSI: ffffffff8d9986f9 RDI: 0000000000000001
RBP: ffffc9000460f418 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 0000000000040001 R14: ffff8881000009c0 R15: 1ffff920008c1e70
 __slab_free+0x2d7/0x400
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 __kmalloc_cache_noprof+0x1be/0x3d0
 rxrpc_alloc_data_txbuf+0x8a/0x640
 rxrpc_send_data+0xf3e/0x2160
 rxrpc_do_sendmsg+0x1098/0x1220
 __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: 0033:0x7f79de98e9a9
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:00007f79df762038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f79debb5fa0 RCX: 00007f79de98e9a9
RDX: 000000000000ff4c RSI: 0000200000000000 RDI: 000000000000000b
RBP: 00007f79dea10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f79debb5fa0 R15: 00007ffca99154e8
 </TASK>
sched: DL replenish lagged too much
