rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=78ec/1/0x4000000000000000 softirq=16300/16306 fqs=4634
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1016669          0            0
rcu: 	cputime:    24070      28409           85   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=7309 q=3155 ncpus=2)
CPU: 0 UID: 0 PID: 6490 Comm: syz.2.270 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:ffffc900000075e0 EFLAGS: 00000206
RAX: c0b7cc25a8ff3d00 RBX: 1ffff92000000ec4 RCX: c0b7cc25a8ff3d00
RDX: 0000000000000002 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc900000076d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f9caab7b6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f326b5b7bac CR3: 0000000029278000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 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:printk_get_console_flush_type+0x0/0x460
Code: fd 8d e8 83 56 82 00 e9 10 ff ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 48 89 fb e8 e2 32 1f 00 ba 04 00 00 00 48 89 df
RSP: 0018:ffffc9000310ecd8 EFLAGS: 00000293
RAX: ffffffff81a139af RBX: ffffffff81a12faa RCX: ffff888030490000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000310edc0
RBP: ffffc9000310ee30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000081a13701 R15: 0000000000000000
 console_flush_all+0x112/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 tc_get_tfilter+0x1bc/0xd80
 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: 0033:0x7f9ca9d8eb69
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:00007f9caab7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9ca9fb5fa0 RCX: 00007f9ca9d8eb69
RDX: 0000000000000000 RSI: 0000200000000600 RDI: 000000000000000d
RBP: 00007f9ca9e11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9ca9fb5fa0 R15: 00007ffd675ab8f8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6490 Comm: syz.2.270 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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 64 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 42 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:ffffc900000075b8 EFLAGS: 00000006
RAX: c0b7cc25a8ff3d00 RBX: 1ffff92000000ec4 RCX: c0b7cc25a8ff3d00
RDX: 0000000000000002 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc900000076d8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f9caab7b6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f326b5b7bac CR3: 0000000029278000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 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 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:ffffc900000075e0 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_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:printk_get_console_flush_type+0x0/0x460
Code: fd 8d e8 83 56 82 00 e9 10 ff ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 48 89 fb e8 e2 32 1f 00 ba 04 00 00 00 48 89 df
RSP: 0018:ffffc9000310ecd8 EFLAGS: 00000293
RAX: ffffffff81a139af RBX: ffffffff81a12faa RCX: ffff888030490000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000310edc0
RBP: ffffc9000310ee30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000081a13701 R15: 0000000000000000
 console_flush_all+0x112/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 tc_get_tfilter+0x1bc/0xd80
 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: 0033:0x7f9ca9d8eb69
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:00007f9caab7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9ca9fb5fa0 RCX: 00007f9ca9d8eb69
RDX: 0000000000000000 RSI: 0000200000000600 RDI: 000000000000000d
RBP: 00007f9ca9e11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9ca9fb5fa0 R15: 00007ffd675ab8f8
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 266s! [syz.2.270:6490]
Modules linked in:
irq event stamp: 10320497
hardirqs last  enabled at (10320496): [<ffffffff8b6e9424>] irqentry_exit+0x74/0x90
hardirqs last disabled at (10320497): [<ffffffff8b6e7f6e>] sysvec_apic_timer_interrupt+0xe/0xc0
softirqs last  enabled at (4310): [<ffffffff8185bd4a>] __irq_exit_rcu+0xca/0x1f0
softirqs last disabled at (4313): [<ffffffff8185bd4a>] __irq_exit_rcu+0xca/0x1f0
CPU: 0 UID: 0 PID: 6490 Comm: syz.2.270 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:ffffc90000007580 EFLAGS: 00000206
RAX: c0b7cc25a8ff3d00 RBX: 1ffff92000000eb8 RCX: c0b7cc25a8ff3d00
RDX: 0000000000000002 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc90000007678 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f9caab7b6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f326b5b7bac CR3: 0000000029278000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 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_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:printk_get_console_flush_type+0x0/0x460
Code: fd 8d e8 83 56 82 00 e9 10 ff ff ff 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 41 57 41 56 53 48 89 fb e8 e2 32 1f 00 ba 04 00 00 00 48 89 df
RSP: 0018:ffffc9000310ecd8 EFLAGS: 00000293
RAX: ffffffff81a139af RBX: ffffffff81a12faa RCX: ffff888030490000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000310edc0
RBP: ffffc9000310ee30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000081a13701 R15: 0000000000000000
 console_flush_all+0x112/0xc40
 console_unlock+0xc4/0x270
 vprintk_emit+0x5b7/0x7a0
 _printk+0xcf/0x120
 __nla_validate_parse+0x2563/0x2d40
 __nla_parse+0x40/0x60
 tc_get_tfilter+0x1bc/0xd80
 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: 0033:0x7f9ca9d8eb69
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:00007f9caab7b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9ca9fb5fa0 RCX: 00007f9ca9d8eb69
RDX: 0000000000000000 RSI: 0000200000000600 RDI: 000000000000000d
RBP: 00007f9ca9e11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9ca9fb5fa0 R15: 00007ffd675ab8f8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #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:pv_native_safe_halt+0x13/0x20
Code: d3 de 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d d3 ad 19 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000177de0 EFLAGS: 00000282
RAX: cc279399e9d99700 RBX: ffffffff81975f18 RCX: cc279399e9d99700
RDX: 0000000000000001 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc90000177f20 R08: ffff888136632f9b R09: 1ffff11026cc65f3
R10: dffffc0000000000 R11: ffffed1026cc65f4 R12: ffffffff8fa1e8f0
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110200d4000
FS:  0000000000000000(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cc7983adf8 CR3: 000000000df38000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x147
 </TASK>
