rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=fa84/1/0x4000000000000000 softirq=26399/26399 fqs=4595
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1042901          0            0
rcu: 	cputime:    25109      27370           83   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=16901 q=1081 ncpus=2)
CPU: 1 UID: 0 PID: 9279 Comm: syz.3.1535 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:ffffc900001e05e0 EFLAGS: 00000206
RAX: 65dbe5cdd3a4ee00 RBX: 1ffff9200003c0c4 RCX: 65dbe5cdd3a4ee00
RDX: 0000000000000002 RSI: ffffffff8d998701 RDI: ffffffff8be29f80
RBP: ffffc900001e06d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007fb41d8956c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000114a6c000 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_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 rcu_core+0xca8/0x1710
 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:stack_trace_save+0xf/0xe0
Code: 0b 90 45 31 ed eb e0 0f 1f 40 00 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 56 53 48 83 e4 e0 <48> 81 ec 80 00 00 00 65 48 8b 05 d2 1b f3 10 48 89 44 24 78 48 8d
RSP: 0018:ffffc90002bf7480 EFLAGS: 00000282
RAX: ffffc90002bf74b0 RBX: 0000000000000dc0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffc90002bf74b0
RBP: ffffc90002bf74a0 R08: 0000000000000004 R09: 0000000000000000
R10: ffffc90002bf74b0 R11: ffffffff897724d0 R12: ffff88801a442140
R13: 0000000000000dc0 R14: ffff8881110dd000 R15: ffffc90002bf74b0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kvmalloc_node_noprof+0x30d/0x5f0
 pfifo_fast_init+0x10d/0x6b0
 qdisc_create_dflt+0x13b/0x4e0
 mq_init+0x2dc/0x660
 qdisc_create_dflt+0x13b/0x4e0
 dev_activate+0x1ce/0x1150
 __dev_open+0x69c/0x880
 __dev_change_flags+0x1ea/0x6d0
 netif_change_flags+0x88/0x1a0
 dev_change_flags+0x130/0x260
 dev_ioctl+0x7b4/0x1150
 sock_do_ioctl+0x22c/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb41c98eb69
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:00007fb41d895038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb41cbb5fa0 RCX: 00007fb41c98eb69
RDX: 0000200000002280 RSI: 0000000000008914 RDI: 0000000000000008
RBP: 00007fb41ca11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb41cbb5fa0 R15: 00007ffe87690368
 </TASK>
sched: DL replenish lagged too much
