rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=eadc/1/0x4000000000000000 softirq=22855/22856 fqs=5242
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1108265          0            0
rcu: 	cputime:    25358      27131          127   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=16057 q=15970 ncpus=2)
CPU: 1 UID: 0 PID: 7874 Comm: syz.1.586 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:unwind_next_frame+0x19b0/0x2390
Code: 44 88 8b be 66 03 00 00 48 c7 c2 80 45 88 8b e8 76 a2 2b 00 48 c7 c7 e0 f0 13 8e 4c 89 fe e8 57 88 2b 00 e8 72 1e 35 00 89 d8 <48> 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9a 9f fe 09
RSP: 0018:ffffc900001e0458 EFLAGS: 00000287
RAX: 0000000090361001 RBX: ffffffff90361001 RCX: 4fada2d7b28c8400
RDX: 0000000000000002 RSI: ffffffff8d998836 RDI: ffffffff8be29f40
RBP: dffffc0000000000 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffc900001e0ca0
R13: ffffc900001d9000 R14: ffffc900001e0528 R15: ffffffff8172aae5
FS:  00007fda23f5b6c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3305ffff CR3: 0000000110596000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 __kfence_alloc+0x2b2/0x3b0
 kmem_cache_alloc_node_noprof+0x315/0x3c0
 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: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 8b 2d 21 f6 e8 c6 00 58 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:ffffc90002c6e9c0 EFLAGS: 00000282
RAX: 4fada2d7b28c8400 RBX: 0000000000000000 RCX: 4fada2d7b28c8400
RDX: 0000000000000000 RSI: ffffffff8d998836 RDI: 0000000000000001
RBP: ffffc90002c6ea70 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200058dd38
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_switch+0x102/0x130
Code: 48 c1 e3 05 4c 8d 63 28 4d 39 fc 77 9d 49 ff c6 4d 89 33 49 89 4c 1b 08 4d 89 54 1b 10 49 89 7c 1b 18 49 89 54 1b 20 eb 81 5b <41> 5c 41 5e 41 5f c3 cc cc cc cc cc b9 05 00 00 00 48 85 c0 0f 85
RSP: 0018:ffffc90002c6eb30 EFLAGS: 00000246
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: 0000000000000001
RDX: ffffffff8b6aa838 RSI: ffffffff8f88ed20 RDI: 0000000000000005
RBP: ffffffff8b924086 R08: ffff8880292b3980 R09: 0000000000000008
R10: 0000000000000007 R11: 0000000000000000 R12: ffffc90002c6ec40
R13: ffffc90002c6ed80 R14: 0000000000000405 R15: ffffffff8b924084
 vsnprintf+0x118/0xf00
 snprintf+0xda/0x120
 reg_type_str+0x21c/0x300
 print_reg_state+0x111/0x16f0
 print_verifier_state+0x306/0x1f40
 do_check+0x55c8/0xe520
 do_check_common+0x1918/0x2470
 bpf_check+0x1746a/0x1d2e0
 bpf_prog_load+0x1318/0x1930
 __sys_bpf+0x528/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda2318e9a9
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:00007fda23f5b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fda233b5fa0 RCX: 00007fda2318e9a9
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007fda23210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fda233b5fa0 R15: 00007ffdcf8d3d98
 </TASK>
sched: DL replenish lagged too much
