rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10493 ticks this GP) idle=8394/1/0x4000000000000000 softirq=18060/18065 fqs=4838
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   980418          0            0
rcu: 	cputime:    25500      26979           96   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=11185 q=3557 ncpus=2)
CPU: 0 UID: 0 PID: 6715 Comm: syz.0.249 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-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 62 2c 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:ffffc900000075e0 EFLAGS: 00000206
RAX: 68949f4ab22a9300 RBX: 1ffff92000000ec4 RCX: 68949f4ab22a9300
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc900000076d8 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f73d9b826c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000780 CR3: 0000000028988000 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: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 1d 21 f6 e8 c6 f0 57 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:ffffc9000a7f6d60 EFLAGS: 00000286
RAX: 68949f4ab22a9300 RBX: 0000000000000000 RCX: 68949f4ab22a9300
RDX: 0000000000000006 RSI: ffffffff8d998940 RDI: 0000000000000001
RBP: ffffc9000a7f6e00 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920014fedac
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__mutex_lock+0x13d/0xe80
Code: c1 e8 03 42 0f b6 04 28 84 c0 0f 85 0d 0c 00 00 83 3d b6 4d 3b 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 05 e8 ec 46 b3 f6 4d 39 64 24 60 0f 85 7b 0b 00 00 bf 01 00 00
RSP: 0018:ffffc9000a7f6ec0 EFLAGS: 00000246
RAX: 1ffffffff1ea39b8 RBX: 0000000000000000 RCX: ffffffff99ab5203
RDX: ffff8880219cd640 RSI: ffffffff8db8665f RDI: ffffffff8f51cdc0
RBP: ffffc9000a7f7060 R08: ffffc9000a7f6fc7 R09: 0000000000000000
R10: ffffc9000a7f6fa0 R11: fffff520014fedf9 R12: ffffffff8f51cd60
R13: dffffc0000000000 R14: ffff888024f04000 R15: 0000000000000000
 ethnl_default_dump_one+0x151/0x7e0
 ethnl_default_dumpit+0x30c/0x600
 genl_dumpit+0x10b/0x1b0
 netlink_dump+0x6de/0xe60
 __netlink_dump_start+0x5cb/0x7e0
 genl_family_rcv_msg_dumpit+0x1e7/0x2c0
 genl_rcv_msg+0x5da/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 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: 0033:0x7f73d8d8e9a9
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:00007f73d9b82038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f73d8fb6080 RCX: 00007f73d8d8e9a9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000b
RBP: 00007f73d8e10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f73d8fb6080 R15: 00007ffce8ccb5d8
 </TASK>
sched: DL replenish lagged too much
