rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=fd2c/1/0x4000000000000000 softirq=15748/15748 fqs=4600
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1046903          0            0
rcu: 	cputime:    23993      28486           78   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=8709 q=2069 ncpus=2)
CPU: 0 UID: 0 PID: 6664 Comm: syz.2.343 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:ffffc900000075a0 EFLAGS: 00000206
RAX: b5e994c2fee7e700 RBX: 1ffff92000000ebc RCX: b5e994c2fee7e700
RDX: 0000000000000003 RSI: ffffffff8d9987c6 RDI: ffffffff8be29f80
RBP: ffffc90000007698 R08: ffffffff8fa1eaf7 R09: 1ffffffff1f43d5e
R10: dffffc0000000000 R11: fffffbfff1f43d5f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007fd3d36786c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 00000000237b0000 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
 kfree+0x18e/0x440
 slab_free_after_rcu_debug+0x60/0x2a0
 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:unwind_next_frame+0x22/0x2390
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 89 fe 48 bd 00 00 00 00 00 fc ff df <48> 8d 5f 48 48 89 d8 48 c1 e8 03 48 89 44 24 30 80 3c 28 00 74 08
RSP: 0018:ffffc90007e35e38 EFLAGS: 00000292
RAX: 0000000000000001 RBX: ffffc90007e35fc0 RCX: b5e994c2fee7e700
RDX: dffffc0000000000 RSI: ffffffff82230b1e RDI: ffffc90007e35f08
RBP: dffffc0000000000 R08: ffffc90007e35fd0 R09: 0000000000000000
R10: ffffc90007e35f58 R11: ffffffff81acf520 R12: ffff8881087fd640
R13: 0000000000000000 R14: ffffc90007e35f08 R15: ffffc90007e35f08
 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
 netlink_broadcast_filtered+0x103e/0x1140
 nlmsg_notify+0xf0/0x1a0
 fib_table_delete+0xca9/0xf80
 fib_magic+0x2e4/0x390
 fib_del_ifaddr+0x28b/0x1480
 fib_inetaddr_event+0xbb/0x190
 notifier_call_chain+0x1b6/0x3e0
 blocking_notifier_call_chain+0x6a/0x90
 __inet_del_ifa+0x87d/0x1040
 inetdev_event+0x632/0x15b0
 notifier_call_chain+0x1b6/0x3e0
 netif_set_mtu_ext+0x438/0x620
 do_setlink+0x91a/0x41c0
 rtnl_newlink+0x160b/0x1c70
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x805/0xb30
 __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: 0033:0x7fd3d278e9a9
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:00007fd3d3678038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd3d29b5fa0 RCX: 00007fd3d278e9a9
RDX: 0000000020000004 RSI: 0000200000000480 RDI: 000000000000000b
RBP: 00007fd3d2810d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd3d29b5fa0 R15: 00007ffc21750458
 </TASK>
sched: DL replenish lagged too much
