rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ef4c/1/0x4000000000000000 softirq=16392/16395 fqs=5190
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   907956          1            0
rcu: 	cputime:    26364      26125          104   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=8361 q=2780 ncpus=2)
CPU: 0 UID: 0 PID: 6184 Comm: syz.2.123 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:ffffc900000073a0 EFLAGS: 00000206
RAX: 3687cf124514fe00 RBX: 1ffff92000000e7c RCX: 3687cf124514fe00
RDX: 0000000000000002 RSI: ffffffff8d998727 RDI: ffffffff8be29f80
RBP: ffffc90000007498 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007fc0694806c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f093af4d7a0 CR3: 0000000027d0a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/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_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20
RIP: 0010:__schedule+0x0/0x4d00
Code: b3 f6 45 89 f8 89 d9 48 8b 5c 24 08 e9 ee fe ff ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc90003b3fad8 EFLAGS: 00000282
RAX: 3687cf124514fe00 RBX: 0000000000000000 RCX: 3687cf124514fe00
RDX: 0000000000000000 RSI: ffffffff8d998727 RDI: 0000000000000001
RBP: ffffc90003b3fb80 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000767f5c
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__kmalloc_noprof+0x6a/0x4f0
Code: 67 03 00 00 f7 c5 11 00 40 00 0f 85 65 03 00 00 45 31 f6 41 8d 4f ff 49 81 ff c0 00 00 00 77 0c c1 e9 03 0f b6 81 50 f7 bb 8d <eb> 0a b8 ff ff ff ff 0f bd c1 ff c0 89 c3 83 f8 0e 0f 83 5a 03 00
RSP: 0018:ffffc90003b3fc40 EFLAGS: 00000203
RAX: 0000000000000004 RBX: ffff888119e87000 RCX: 0000000000000001
RDX: ffff888106858000 RSI: 0000000000000dc0 RDI: 0000000000000010
RBP: 0000000000000dc0 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: 000000000000000c R11: ffffffff81acf520 R12: 0000000000000010
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000010
 security_sk_alloc+0x52/0x390
 sk_prot_alloc+0x101/0x220
 sk_alloc+0x3a/0x370
 __netlink_create+0x65/0x260
 netlink_create+0x3ca/0x590
 __sock_create+0x4b3/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc06858eb69
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:00007fc069480038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007fc0687b5fa0 RCX: 00007fc06858eb69
RDX: 0000000000000010 RSI: 0000000000000003 RDI: 0000000000000010
RBP: 00007fc068611df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc0687b5fa0 R15: 00007ffc65199ae8
 </TASK>
sched: DL replenish lagged too much
