rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=161c/1/0x4000000000000000 softirq=19637/19637 fqs=4351
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   997710          0            0
rcu: 	cputime:    25761      26718           94   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=11797 q=3497 ncpus=2)
CPU: 1 UID: 0 PID: 6956 Comm: syz.0.297 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10 #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 b2 e8 f2 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:ffffc900001e0440 EFLAGS: 00000206
RAX: 3243e7a48edde800 RBX: 1ffff9200003c090 RCX: 3243e7a48edde800
RDX: 0000000000000002 RSI: ffffffff8d9792e3 RDI: ffffffff8be30a00
RBP: ffffc900001e0538 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffffffff8e141800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fea8cb606c0(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555576012808 CR3: 000000002f2e4000 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
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 lapb_send_control+0x38/0x3e0
 lapb_t1timer_expiry+0x699/0xab0
 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 eb 1f 1f f6 e8 c6 48 56 f6 fb bf 01 00 00 00 <e8> eb aa ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000825f280 EFLAGS: 00000282
RAX: 3243e7a48edde800 RBX: 0000000000000000 RCX: 3243e7a48edde800
RDX: 0000000000000000 RSI: ffffffff8d9792e3 RDI: 0000000000000001
RBP: ffffc9000825f330 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200104be50
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:kasan_quarantine_put+0x88/0x220
Code: e8 8d 5b a4 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f 85 88 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 31 c0 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f e9 16 cb 4f 09 cc 48 8d 80
RSP: 0018:ffffc9000825f3f8 EFLAGS: 00000206
RAX: 3243e7a48edde801 RBX: ffff88810fe4cd80 RCX: 3243e7a48edde800
RDX: 0000000000000000 RSI: ffffffff8d9792e3 RDI: ffffffff8be30a00
RBP: 0000000000000000 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffff88801a449a00
R13: 0000000000000000 R14: 0000000000024380 R15: 0000000000000282
 kfree+0x18e/0x440
 compute_scc+0xe81/0xf00
 bpf_check+0x173f6/0x1d2d0
 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: 0033:0x7fea8bd8ebe9
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:00007fea8cb60038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fea8bfb6090 RCX: 00007fea8bd8ebe9
RDX: 0000000000000037 RSI: 0000200000000340 RDI: 0000000000000005
RBP: 00007fea8be11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fea8bfb6128 R14: 00007fea8bfb6090 R15: 00007ffdf7c4f358
 </TASK>
sched: DL replenish lagged too much
