Warning: Permanently added '10.128.0.189' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 75.276234][ T29] audit: type=1400 audit(1592960939.903:8): avc: denied { execmem } for pid=6797 comm="syz-executor855" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[ 75.290962][ T6798] IPVS: ftp: loaded support on port[0] = 21
[ 75.432559][ C0] ------------[ cut here ]------------
[ 75.438127][ C0] kernel BUG at net/l2tp/l2tp_core.c:1572!
[ 75.444253][ C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[ 75.450314][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-syzkaller #0
[ 75.457838][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 75.467881][ C0] RIP: 0010:l2tp_session_free+0x218/0x250
[ 75.473572][ C0] Code: 89 ef e8 1b 04 5a fc e9 4b ff ff ff e8 51 94 33 fa 4c 89 e7 e8 b9 c8 e1 fe e9 39 ff ff ff e8 3f 94 33 fa 0f 0b e8 38 94 33 fa <0f> 0b 4c 89 e7 e8 7e a9 72 fa e9 48 fe ff ff 48 89 df e8 71 a9 72
[ 75.493336][ C0] RSP: 0018:ffffc90000007d28 EFLAGS: 00010246
[ 75.499390][ C0] RAX: ffffffff89886580 RBX: ffff8880a7075400 RCX: ffffffff8740393d
[ 75.507339][ C0] RDX: 0000000000000000 RSI: ffffffff87403a88 RDI: 0000000000000005
[ 75.515300][ C0] RBP: ffff88809f185000 R08: ffffffff89886580 R09: ffffed1013e30a1a
[ 75.523249][ C0] R10: ffff88809f1850cb R11: ffffed1013e30a19 R12: 0000000000000000
[ 75.531239][ C0] R13: ffff88809edd64a8 R14: ffffc90000007e98 R15: ffffffff89886580
[ 75.539194][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[ 75.548097][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 75.554654][ C0] CR2: 000000000049f410 CR3: 0000000009879000 CR4: 00000000001406f0
[ 75.562687][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 75.570630][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 75.578583][ C0] Call Trace:
[ 75.581847][ C0]
[ 75.584679][ C0] pppol2tp_session_destruct+0x12e/0x180
[ 75.590316][ C0] ? pppol2tp_recvmsg+0x270/0x270
[ 75.595313][ C0] __sk_destruct+0x4b/0x7c0
[ 75.599809][ C0] sk_destruct+0xc6/0x100
[ 75.604120][ C0] __sk_free+0xef/0x3d0
[ 75.608256][ C0] sk_free+0x78/0xa0
[ 75.612222][ C0] pppol2tp_put_sk+0x9b/0xd0
[ 75.616783][ C0] rcu_core+0x59f/0x1370
[ 75.620997][ C0] ? __rcu_read_unlock+0x560/0x560
[ 75.626539][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 75.632071][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 75.638023][ C0] __do_softirq+0x26c/0x9f7
[ 75.642501][ C0] irq_exit+0x192/0x1d0
[ 75.646628][ C0] smp_apic_timer_interrupt+0x19e/0x600
[ 75.652150][ C0] apic_timer_interrupt+0xf/0x20
[ 75.657586][ C0]
[ 75.660500][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 75.665843][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 84 9c 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 74 9c 4a 00 fb f4 cc 41 56 41 55 41 54 55 53 e8 33 9c 83 f9 e8 be c8 bf fb 0f 1f
[ 75.685607][ C0] RSP: 0018:ffffffff89807c50 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
[ 75.694090][ C0] RAX: ffffffff89886580 RBX: 0000000000000000 RCX: 1ffffffff15173ba
[ 75.702063][ C0] RDX: 0000000000000000 RSI: ffffffff87de1248 RDI: ffffffff89886e00
[ 75.710179][ C0] RBP: ffff88821af3e864 R08: 0000000000000000 R09: 0000000000000001
[ 75.718133][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821af3e864
[ 75.726091][ C0] R13: 1ffffffff1300f95 R14: ffff88821af3e865 R15: 0000000000000001
[ 75.734051][ C0] ? acpi_safe_halt+0x88/0x110
[ 75.738800][ C0] acpi_safe_halt+0x8d/0x110
[ 75.743378][ C0] acpi_idle_do_entry+0xa9/0xe0
[ 75.748200][ C0] acpi_idle_enter+0x437/0xb20
[ 75.752934][ C0] ? acpi_idle_enter_bm+0x2d0/0x2d0
[ 75.758117][ C0] ? kvm_clock_read+0x14/0x30
[ 75.762763][ C0] ? kvm_sched_clock_read+0x5/0x10
[ 75.767868][ C0] ? sched_clock+0x2a/0x40
[ 75.772255][ C0] ? sched_clock_cpu+0x18/0x1b0
[ 75.777086][ C0] cpuidle_enter_state+0xdd/0xd60
[ 75.782100][ C0] ? assoc_array_gc+0x1200/0x1250
[ 75.787094][ C0] cpuidle_enter+0x4a/0xa0
[ 75.791483][ C0] do_idle+0x42f/0x690
[ 75.795525][ C0] ? arch_cpu_idle_exit+0x70/0x70
[ 75.800532][ C0] ? schedule+0xe7/0x2a0
[ 75.804761][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[ 75.810976][ C0] cpu_startup_entry+0x14/0x20
[ 75.815714][ C0] start_kernel+0x9be/0x9fb
[ 75.820211][ C0] ? mem_encrypt_init+0x5/0x5
[ 75.824874][ C0] ? x86_family+0x3d/0x50
[ 75.829175][ C0] ? load_ucode_bsp+0x23d/0x27d
[ 75.833998][ C0] secondary_startup_64+0xa4/0xb0
[ 75.839008][ C0] Modules linked in:
[ 75.842941][ C0] ---[ end trace 536b6134877b1e52 ]---
[ 75.848412][ C0] RIP: 0010:l2tp_session_free+0x218/0x250
[ 75.854161][ C0] Code: 89 ef e8 1b 04 5a fc e9 4b ff ff ff e8 51 94 33 fa 4c 89 e7 e8 b9 c8 e1 fe e9 39 ff ff ff e8 3f 94 33 fa 0f 0b e8 38 94 33 fa <0f> 0b 4c 89 e7 e8 7e a9 72 fa e9 48 fe ff ff 48 89 df e8 71 a9 72
[ 75.873793][ C0] RSP: 0018:ffffc90000007d28 EFLAGS: 00010246
[ 75.879864][ C0] RAX: ffffffff89886580 RBX: ffff8880a7075400 RCX: ffffffff8740393d
[ 75.887863][ C0] RDX: 0000000000000000 RSI: ffffffff87403a88 RDI: 0000000000000005
[ 75.895899][ C0] RBP: ffff88809f185000 R08: ffffffff89886580 R09: ffffed1013e30a1a
[ 75.903890][ C0] R10: ffff88809f1850cb R11: ffffed1013e30a19 R12: 0000000000000000
[ 75.911869][ C0] R13: ffff88809edd64a8 R14: ffffc90000007e98 R15: ffffffff89886580
[ 75.919882][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[ 75.928822][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 75.935426][ C0] CR2: 000000000049f410 CR3: 0000000009879000 CR4: 00000000001406f0
[ 75.943509][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 75.951483][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 75.959467][ C0] Kernel panic - not syncing: Fatal exception in interrupt
[ 75.968234][ C0] Kernel Offset: disabled
[ 75.972566][ C0] Rebooting in 86400 seconds..