Warning: Permanently added '10.128.1.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.284454][ T6815] IPVS: ftp: loaded support on port[0] = 21 [ 60.414843][ C1] ------------[ cut here ]------------ [ 60.420529][ C1] kernel BUG at net/l2tp/l2tp_core.c:1572! [ 60.426409][ C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 60.432488][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-syzkaller #0 [ 60.440140][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.450215][ C1] RIP: 0010:l2tp_session_free+0x218/0x250 [ 60.455933][ C1] Code: 89 ef e8 bb 0a 5a fc e9 4b ff ff ff e8 d1 30 35 fa 4c 89 e7 e8 29 83 e1 fe e9 39 ff ff ff e8 bf 30 35 fa 0f 0b e8 b8 30 35 fa <0f> 0b 4c 89 e7 e8 ee f8 73 fa e9 48 fe ff ff 48 89 df e8 e1 f8 73 [ 60.477255][ C1] RSP: 0018:ffffc90000da8d28 EFLAGS: 00010206 [ 60.483298][ C1] RAX: ffff8880a9632340 RBX: ffff88809f139800 RCX: ffffffff873e5fed [ 60.491390][ C1] RDX: 0000000000000100 RSI: ffffffff873e6138 RDI: 0000000000000005 [ 60.499356][ C1] RBP: ffff8880a78b8000 R08: ffff8880a9632340 R09: ffffed1014f1701a [ 60.507319][ C1] R10: ffff8880a78b80cb R11: ffffed1014f17019 R12: 0000000000000000 [ 60.515265][ C1] R13: ffff8880a12c94a8 R14: ffffc90000da8e98 R15: ffff8880a9632340 [ 60.523328][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 60.532245][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.538812][ C1] CR2: 000000000049f410 CR3: 0000000009879000 CR4: 00000000001406e0 [ 60.546865][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.554810][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.562752][ C1] Call Trace: [ 60.566012][ C1] [ 60.568871][ C1] pppol2tp_session_destruct+0x12e/0x180 [ 60.574488][ C1] ? pppol2tp_recvmsg+0x270/0x270 [ 60.579495][ C1] __sk_destruct+0x4b/0x7c0 [ 60.583985][ C1] sk_destruct+0xc6/0x100 [ 60.588299][ C1] __sk_free+0xef/0x3d0 [ 60.592430][ C1] sk_free+0x78/0xa0 [ 60.596395][ C1] pppol2tp_put_sk+0x9b/0xd0 [ 60.600962][ C1] rcu_core+0x59f/0x1370 [ 60.605181][ C1] ? __rcu_read_unlock+0x560/0x560 [ 60.610288][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.615817][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.621871][ C1] __do_softirq+0x26c/0x9f7 [ 60.626351][ C1] irq_exit+0x192/0x1d0 [ 60.630481][ C1] smp_apic_timer_interrupt+0x19e/0x600 [ 60.636034][ C1] apic_timer_interrupt+0xf/0x20 [ 60.640940][ C1] [ 60.643852][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 60.649318][ C1] Code: cc cc cc cc cc cc cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 24 fc 4b 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 fc 4b 00 fb f4 cc 41 56 41 55 41 54 55 53 e8 73 c8 84 f9 e8 8e 41 bf fb 0f 1f [ 60.669008][ C1] RSP: 0018:ffffc90000d3fc70 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 60.677397][ C1] RAX: ffff8880a9632340 RBX: 0000000000000000 RCX: 1ffffffff1516a22 [ 60.685367][ C1] RDX: 0000000000000000 RSI: ffffffff87dcb648 RDI: ffff8880a9632bc0 [ 60.693353][ C1] RBP: ffff8880a729f064 R08: 0000000000000000 R09: 0000000000000001 [ 60.701333][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a729f064 [ 60.710849][ C1] R13: 1ffff920001a7f99 R14: ffff8880a729f065 R15: 0000000000000001 [ 60.718950][ C1] ? acpi_safe_halt+0x88/0x110 [ 60.723786][ C1] acpi_safe_halt+0x8d/0x110 [ 60.728384][ C1] acpi_idle_do_entry+0xa9/0xe0 [ 60.733213][ C1] acpi_idle_enter+0x437/0xb20 [ 60.738154][ C1] ? acpi_idle_enter_bm+0x2d0/0x2d0 [ 60.743427][ C1] ? kvm_clock_read+0x14/0x30 [ 60.748104][ C1] ? kvm_sched_clock_read+0x5/0x10 [ 60.753220][ C1] ? sched_clock+0x2a/0x40 [ 60.757650][ C1] ? sched_clock_cpu+0x18/0x1b0 [ 60.762664][ C1] cpuidle_enter_state+0xdd/0xd60 [ 60.767712][ C1] ? assoc_array_gc+0x1230/0x1250 [ 60.772730][ C1] cpuidle_enter+0x4a/0xa0 [ 60.777155][ C1] do_idle+0x42f/0x690 [ 60.781210][ C1] ? arch_cpu_idle_exit+0x70/0x70 [ 60.787386][ C1] cpu_startup_entry+0x14/0x20 [ 60.792131][ C1] start_secondary+0x2f8/0x410 [ 60.796875][ C1] ? set_cpu_sibling_map+0x1ed0/0x1ed0 [ 60.802417][ C1] secondary_startup_64+0xa4/0xb0 [ 60.807414][ C1] Modules linked in: [ 60.811655][ C1] ---[ end trace 49fdadf0271859e1 ]--- [ 60.817173][ C1] RIP: 0010:l2tp_session_free+0x218/0x250 [ 60.822889][ C1] Code: 89 ef e8 bb 0a 5a fc e9 4b ff ff ff e8 d1 30 35 fa 4c 89 e7 e8 29 83 e1 fe e9 39 ff ff ff e8 bf 30 35 fa 0f 0b e8 b8 30 35 fa <0f> 0b 4c 89 e7 e8 ee f8 73 fa e9 48 fe ff ff 48 89 df e8 e1 f8 73 [ 60.842795][ C1] RSP: 0018:ffffc90000da8d28 EFLAGS: 00010206 [ 60.849283][ C1] RAX: ffff8880a9632340 RBX: ffff88809f139800 RCX: ffffffff873e5fed [ 60.857336][ C1] RDX: 0000000000000100 RSI: ffffffff873e6138 RDI: 0000000000000005 [ 60.865340][ C1] RBP: ffff8880a78b8000 R08: ffff8880a9632340 R09: ffffed1014f1701a [ 60.873326][ C1] R10: ffff8880a78b80cb R11: ffffed1014f17019 R12: 0000000000000000 [ 60.881337][ C1] R13: ffff8880a12c94a8 R14: ffffc90000da8e98 R15: ffff8880a9632340 [ 60.889552][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 60.898773][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.905411][ C1] CR2: 000000000049f410 CR3: 0000000009879000 CR4: 00000000001406e0 [ 60.913380][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.921428][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.929526][ C1] Kernel panic - not syncing: Fatal exception in interrupt [ 60.938763][ C1] Kernel Offset: disabled [ 60.943099][ C1] Rebooting in 86400 seconds..