rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10496 ticks this GP) idle=0fcc/1/0x4000000000000000 softirq=13017/507216 fqs=4753
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1044182     258906            0
rcu: 	cputime:    23929      24467         4114   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=5917 q=3069 ncpus=2)
CPU: 1 UID: 0 PID: 6016 Comm: syz.2.54 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:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 00 ad 89 8b e8 a7 fe e8 09 65 66 c7 05 85 5b 1a 11 00 00 e8 58 00 42 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000286
RAX: 790d570c812bb200 RBX: 0000000000000200 RCX: 790d570c812bb200
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc900001e0f50 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
FS:  00007f6dc41e96c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000010bd4a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __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:console_flush_all+0x7f7/0xc40
Code: 48 21 c3 0f 85 e9 01 00 00 e8 75 e7 1e 00 48 8b 5c 24 20 4d 85 f6 75 07 e8 66 e7 1e 00 eb 06 e8 5f e7 1e 00 fb 48 8b 44 24 28 <42> 80 3c 20 00 74 08 48 89 df e8 8a 0a 82 00 48 8b 1b 48 8b 44 24
RSP: 0018:ffffc900065fed00 EFLAGS: 00000246
RAX: 1ffffffff1d902ff RBX: ffffffff8ec817f8 RCX: 0000000000080000
RDX: ffffc90003c41000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900065fee50 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8ec817a0
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 rtnl_fdb_add+0x17b/0xa50
 rtnetlink_rcv_msg+0x77c/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: 0033:0x7f6dc338e9a9
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:00007f6dc41e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6dc35b5fa0 RCX: 00007f6dc338e9a9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000c
RBP: 00007f6dc3410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6dc35b5fa0 R15: 00007ffc39125658
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6016 Comm: syz.2.54 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:asm_sysvec_irq_work+0x0/0x20
Code: 16 74 6e 0a e9 41 05 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 03 00 00 48 89 c4 48 89 e7 e8 f6 52 6e 0a e9 21 05 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 d1 03 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc900001e03b8 EFLAGS: 00000006
RAX: 790d570c812bb200 RBX: 1ffff9200003c084 RCX: 790d570c812bb200
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc900001e04d8 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
FS:  00007f6dc41e96c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000010bd4a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
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:ffffc900001e03e0 EFLAGS: 00000206
 __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_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 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:vsnprintf+0x9a/0xf00
Code: c7 c1 ff ff ff ff 48 0f 43 c8 48 89 4c 24 20 4c 0f 43 e3 4c 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 10 0e 00 00 41 0f b6 1f <31> ff 89 de e8 2d 74 55 f6 85 db 0f 84 40 0d 00 00 4c 89 64 24 38
RSP: 0018:ffffc900065fe790 EFLAGS: 00000297
RAX: 0000000000000006 RBX: 000000000000005b RCX: 000000008b8b8900
RDX: dffffc0000000000 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900065fe910 R08: ffffc900065fe897 R09: 0000000000000000
R10: ffffc900065fe880 R11: fffff52000cbfd13 R12: 000000007fffffff
R13: dffffc0000000000 R14: ffffc900065fea6e R15: ffffffff8b8b8980
 sprintf+0xd9/0x120
 info_print_prefix+0x1f3/0x310
 record_print_text+0x154/0x430
 printk_get_next_message+0x26d/0x7b0
 console_flush_all+0x4ca/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 rtnl_fdb_add+0x17b/0xa50
 rtnetlink_rcv_msg+0x77c/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: 0033:0x7f6dc338e9a9
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:00007f6dc41e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6dc35b5fa0 RCX: 00007f6dc338e9a9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000c
RBP: 00007f6dc3410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6dc35b5fa0 R15: 00007ffc39125658
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6016 Comm: syz.2.54 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:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 e2 db 86 03 66
RSP: 0018:ffffc900001e0bd8 EFLAGS: 00000046
RAX: 0000000000000323 RBX: ffff888136623900 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000000323 RDI: 0000000000000838
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81aec9fe
R10: dffffc0000000000 R11: ffffffff81702490 R12: 0000000010000a10
R13: dffffc0000000000 R14: 0000000000000323 R15: 0000000000000020
FS:  00007f6dc41e96c0(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000010bd4a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1cf/0x360
 hrtimer_interrupt+0x620/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:handle_softirqs+0x1b0/0x870
Code: 89 64 24 30 0f b7 db 48 c7 c7 00 ad 89 8b e8 a7 fe e8 09 65 66 c7 05 85 5b 1a 11 00 00 e8 58 00 42 00 fb 49 c7 c7 c0 c0 e0 8d <b8> ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c
RSP: 0018:ffffc900001e0e40 EFLAGS: 00000286
RAX: 790d570c812bb200 RBX: 0000000000000200 RCX: 790d570c812bb200
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc900001e0f50 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 000000000000000a
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8de0c0c0
 __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:format_decode+0x51e/0xe30
Code: 00 00 00 00 00 fc ff df eb 42 e8 bd 5d 55 f6 49 89 ec 49 ff c4 4c 89 e0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df 0f b6 04 10 <84> c0 4c 8b 74 24 18 0f 85 f1 05 00 00 41 0f b6 04 24 4c 8d 2c 85
RSP: 0018:ffffc900065fe730 EFLAGS: 00000a02
RAX: 0000000000000005 RBX: 0000000000000008 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000075 RDI: 000000000000006c
RBP: ffffffff8b8b8949 R08: ffff888020333980 R09: 0000000000000002
R10: 0000000000000025 R11: 0000000000000002 R12: ffffffff8b8b894a
R13: 0000000000000075 R14: 000000000000006c R15: 0000000000000008
 vsnprintf+0x102/0xf00
 sprintf+0xd9/0x120
 info_print_prefix+0x155/0x310
 record_print_text+0x154/0x430
 printk_get_next_message+0x26d/0x7b0
 console_flush_all+0x4ca/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 rtnl_fdb_add+0x17b/0xa50
 rtnetlink_rcv_msg+0x77c/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: 0033:0x7f6dc338e9a9
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:00007f6dc41e9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f6dc35b5fa0 RCX: 00007f6dc338e9a9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000c
RBP: 00007f6dc3410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6dc35b5fa0 R15: 00007ffc39125658
 </TASK>
