[ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.197' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.689404][ T6831] IPVS: ftp: loaded support on port[0] = 21 executing program [ 57.730506][ T6852] IPv6: ADDRCONF(NETDEV_CHANGE): gtp0: link becomes ready [ 57.742695][ T6852] device vlan0 entered promiscuous mode executing program [ 57.784940][ T6859] IPv6: ADDRCONF(NETDEV_CHANGE): gtp1: link becomes ready [ 57.796217][ T6859] device vlan0 entered promiscuous mode executing program [ 57.844528][ T6866] IPv6: ADDRCONF(NETDEV_CHANGE): gtp2: link becomes ready [ 57.855412][ T6866] device vlan0 entered promiscuous mode executing program [ 57.893973][ T6873] IPv6: ADDRCONF(NETDEV_CHANGE): gtp3: link becomes ready [ 57.904585][ T6873] device vlan0 entered promiscuous mode executing program [ 57.953565][ T6880] IPv6: ADDRCONF(NETDEV_CHANGE): gtp4: link becomes ready [ 57.964059][ T6880] device vlan0 entered promiscuous mode executing program [ 58.003613][ T6887] IPv6: ADDRCONF(NETDEV_CHANGE): gtp5: link becomes ready [ 58.014169][ T6887] device vlan0 entered promiscuous mode executing program [ 58.074487][ T6894] IPv6: ADDRCONF(NETDEV_CHANGE): gtp6: link becomes ready [ 58.086107][ T6894] device vlan0 entered promiscuous mode executing program [ 58.134610][ T6901] IPv6: ADDRCONF(NETDEV_CHANGE): gtp7: link becomes ready [ 58.145188][ T6901] device vlan0 entered promiscuous mode executing program [ 58.193467][ T6908] IPv6: ADDRCONF(NETDEV_CHANGE): gtp8: link becomes ready [ 58.204000][ T6908] device vlan0 entered promiscuous mode executing program [ 58.243705][ T6915] IPv6: ADDRCONF(NETDEV_CHANGE): gtp9: link becomes ready [ 58.254258][ T6915] device gtp0 entered promiscuous mode [ 58.260342][ T6915] device vlan0 entered promiscuous mode [ 58.266280][ T6915] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 58.274726][ T6915] device gtp0 left promiscuous mode executing program [ 58.323466][ T6922] IPv6: ADDRCONF(NETDEV_CHANGE): gtp10: link becomes ready [ 58.338693][ T6925] IPv6: ADDRCONF(NETDEV_CHANGE): gtp11: link becomes ready [ 58.349794][ T6925] device gtp1 entered promiscuous mode [ 58.355331][ T6925] device vlan0 entered promiscuous mode [ 58.363624][ T6925] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready executing program [ 58.372441][ T6925] device gtp1 left promiscuous mode executing program [ 58.423798][ T6932] IPv6: ADDRCONF(NETDEV_CHANGE): gtp12: link becomes ready [ 58.439233][ T6935] IPv6: ADDRCONF(NETDEV_CHANGE): gtp13: link becomes ready [ 58.450352][ T6935] device gtp2 entered promiscuous mode [ 58.456212][ T6935] device vlan0 entered promiscuous mode [ 58.463143][ T6935] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready executing program [ 58.472126][ T6935] device gtp2 left promiscuous mode executing program [ 58.524833][ T6942] IPv6: ADDRCONF(NETDEV_CHANGE): gtp14: link becomes ready [ 58.539943][ T6945] IPv6: ADDRCONF(NETDEV_CHANGE): gtp15: link becomes ready [ 58.550548][ T6945] device gtp3 entered promiscuous mode [ 58.556280][ T6945] device vlan0 entered promiscuous mode [ 58.562296][ C0] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 58.562305][ C0] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 58.562326][ C0] CPU: 0 PID: 6945 Comm: syz-executor207 Not tainted 5.9.0-rc5-syzkaller #0 [ 58.562341][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.562369][ C0] RIP: 0010:skb_release_data+0x232/0x910 [ 58.562383][ C0] Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 [ 58.562390][ C0] RSP: 0018:ffffc90000007a48 EFLAGS: 00010202 [ 58.562405][ C0] RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff88809ede20c0 [ 58.562418][ C0] RDX: ffff888093d9e540 RSI: ffffffff8637bcf5 RDI: 0000000000000008 [ 58.562424][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ab267cf [ 58.562430][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 58.562436][ C0] R13: ffff88809ede20c0 R14: dffffc0000000000 R15: ffff88809ede20f0 [ 58.562447][ C0] FS: 00000000020bd880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 58.562457][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.562465][ C0] CR2: 00000000200004c0 CR3: 000000009f498000 CR4: 00000000001506f0 [ 58.562479][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.562487][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.562492][ C0] Call Trace: [ 58.562497][ C0] [ 58.562508][ C0] ? lock_acquire+0x1f3/0xae0 [ 58.562516][ C0] ? kfree_skb+0x7d/0x100 [ 58.562522][ C0] kfree_skb.part.0+0xc2/0x350 [ 58.562538][ C0] kfree_skb+0x7d/0x100 [ 58.562550][ C0] validate_xmit_skb+0x9d9/0xf00 [ 58.562559][ C0] ? lock_is_held_type+0xbb/0xf0 [ 58.562568][ C0] __dev_queue_xmit+0x990/0x2d60 [ 58.562581][ C0] ? mark_lock+0xbc/0x1710 [ 58.562597][ C0] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 58.562605][ C0] ? mark_held_locks+0x9f/0xe0 [ 58.562613][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 58.562621][ C0] ? lockdep_hardirqs_on_prepare+0x19c/0x530 [ 58.562627][ C0] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 58.562641][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 58.562652][ C0] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 58.562662][ C0] garp_join_timer+0xb9/0xf0 [ 58.562671][ C0] call_timer_fn+0x1ac/0x760 [ 58.562678][ C0] ? garp_request_leave+0x270/0x270 [ 58.562692][ C0] ? msleep_interruptible+0x130/0x130 [ 58.562702][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 58.562709][ C0] ? lockdep_hardirqs_on_prepare+0x19c/0x530 [ 58.562715][ C0] ? _raw_spin_unlock_irq+0x1f/0x80 [ 58.562727][ C0] ? garp_request_leave+0x270/0x270 [ 58.562740][ C0] __run_timers.part.0+0x67c/0xaa0 [ 58.562748][ C0] ? call_timer_fn+0x760/0x760 [ 58.562757][ C0] ? clockevents_program_event+0x12b/0x350 [ 58.562765][ C0] ? mark_held_locks+0x9f/0xe0 [ 58.562776][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 58.562787][ C0] run_timer_softirq+0xae/0x1a0 [ 58.562794][ C0] __do_softirq+0x1f7/0xa91 [ 58.562803][ C0] asm_call_on_stack+0xf/0x20 [ 58.562806][ C0] [ 58.562818][ C0] do_softirq_own_stack+0x9d/0xd0 [ 58.562827][ C0] irq_exit_rcu+0x235/0x280 [ 58.562836][ C0] sysvec_apic_timer_interrupt+0x51/0xf0 [ 58.562843][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 58.562855][ C0] RIP: 0010:console_unlock+0xb4a/0xe60 [ 58.562867][ C0] Code: 89 48 c1 e8 03 42 80 3c 38 00 0f 85 18 03 00 00 48 83 3d 40 f8 58 08 00 0f 84 90 01 00 00 e8 cd 09 17 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 8b 5c 24 64 31 ff 89 de e8 34 06 17 00 85 db 0f 84 [ 58.562873][ C0] RSP: 0018:ffffc90005696ed0 EFLAGS: 00000293 [ 58.562879][ C0] RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000006 [ 58.562885][ C0] RDX: ffff888093d9e540 RSI: ffffffff815d4413 RDI: 0000000000000293 [ 58.562893][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8c5f49e7 [ 58.562898][ C0] R10: fffffbfff18be93c R11: 0000000034393654 R12: ffffffff84c2a060 [ 58.562902][ C0] R13: 000000000000003d R14: ffffffff8a3cb4b0 R15: dffffc0000000000 [ 58.562916][ C0] ? netconsole_netdev_event+0x2b0/0x2b0 [ 58.562927][ C0] ? console_unlock+0xb43/0xe60 [ 58.562947][ C0] vprintk_emit+0x2ff/0x740 [ 58.562965][ C0] vprintk_func+0x8f/0x1a6 [ 58.562981][ C0] printk+0xba/0xed [ 58.562993][ C0] ? log_store.cold+0x16/0x16 [ 58.563011][ C0] ? __dev_open+0x1c6/0x470 [ 58.563037][ C0] ? __dev_set_promiscuity.cold+0x30e/0x35f [ 58.563051][ C0] __dev_set_promiscuity.cold+0x55/0x35f [ 58.563063][ C0] __dev_change_flags+0x3af/0x660 [ 58.563080][ C0] ? dev_set_allmulti+0x30/0x30 [ 58.563096][ C0] rtnl_configure_link+0xee/0x230 [ 58.563106][ C0] __rtnl_newlink+0x10b6/0x1740 [ 58.563115][ C0] ? lock_downgrade+0x830/0x830 [ 58.563126][ C0] ? rtnl_setlink+0x3b0/0x3b0 [ 58.563135][ C0] ? unwind_next_frame+0xe3b/0x1f90 [ 58.563143][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.563153][ C0] ? is_bpf_text_address+0xcb/0x160 [ 58.563160][ C0] ? kernel_text_address+0xbd/0xf0 [ 58.563167][ C0] ? __kernel_text_address+0x9/0x30 [ 58.563176][ C0] ? unwind_get_return_address+0x51/0x90 [ 58.563183][ C0] ? profile_setup.cold+0xc1/0xc1 [ 58.563191][ C0] ? arch_stack_walk+0x97/0xf0 [ 58.563201][ C0] ? stack_trace_save+0x8c/0xc0 [ 58.563209][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 58.563228][ C0] ? lock_is_held_type+0xbb/0xf0 [ 58.563238][ C0] ? kmem_cache_alloc_trace+0x18e/0x2c0 [ 58.563245][ C0] rtnl_newlink+0x64/0xa0 [ 58.563251][ C0] ? __rtnl_newlink+0x1740/0x1740 [ 58.563258][ C0] rtnetlink_rcv_msg+0x44e/0xad0 [ 58.563265][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 58.563273][ C0] ? lock_acquire+0x1f3/0xae0 [ 58.563280][ C0] ? netlink_deliver_tap+0x146/0xb70 [ 58.563289][ C0] netlink_rcv_skb+0x15a/0x430 [ 58.563296][ C0] ? rtnetlink_put_metrics+0x510/0x510 [ 58.563303][ C0] ? netlink_ack+0xa10/0xa10 [ 58.563316][ C0] ? __kmalloc_node_track_caller+0x38/0x60 [ 58.563324][ C0] netlink_unicast+0x533/0x7d0 [ 58.563332][ C0] ? netlink_attachskb+0x810/0x810 [ 58.563340][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 58.563347][ C0] ? __check_object_size+0x171/0x3e4 [ 58.563355][ C0] netlink_sendmsg+0x856/0xd90 [ 58.563364][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 58.563373][ C0] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 58.563380][ C0] ? netlink_unicast+0x7d0/0x7d0 [ 58.563387][ C0] sock_sendmsg+0xcf/0x120 [ 58.563394][ C0] ____sys_sendmsg+0x6e8/0x810 [ 58.563400][ C0] ? kernel_sendmsg+0x50/0x50 [ 58.563407][ C0] ? do_recvmmsg+0x6d0/0x6d0 [ 58.563415][ C0] ? lock_is_held_type+0xbb/0xf0 [ 58.563423][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 58.563431][ C0] ___sys_sendmsg+0xf3/0x170 [ 58.563438][ C0] ? sendmsg_copy_msghdr+0x160/0x160 [ 58.563445][ C0] ? __might_fault+0x11f/0x1d0 [ 58.563452][ C0] ? lock_downgrade+0x830/0x830 [ 58.563460][ C0] ? lock_downgrade+0x830/0x830 [ 58.563470][ C0] ? __might_fault+0x190/0x1d0 [ 58.563478][ C0] ? _copy_to_user+0x126/0x160 [ 58.563487][ C0] ? move_addr_to_user+0xb5/0x200 [ 58.563495][ C0] ? __fget_light+0x215/0x280 [ 58.563503][ C0] __sys_sendmsg+0xe5/0x1b0 [ 58.563509][ C0] ? __sys_sendmsg_sock+0xb0/0xb0 [ 58.563519][ C0] ? check_preemption_disabled+0x50/0x130 [ 58.563525][ C0] ? syscall_enter_from_user_mode+0x1d/0x60 [ 58.563533][ C0] do_syscall_64+0x2d/0x70 [ 58.563540][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.563545][ C0] RIP: 0033:0x441929 [ 58.563553][ C0] Code: e8 5c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 bb 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 58.563557][ C0] RSP: 002b:00007ffcad37c118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 58.563564][ C0] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441929 [ 58.563568][ C0] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 [ 58.563572][ C0] RBP: 00007ffcad37c120 R08: 0000000100000000 R09: 0000000100000000 [ 58.563576][ C0] R10: 0000000100000000 R11: 0000000000000246 R12: 000000000000e4a1 [ 58.563580][ C0] R13: 0000000000402800 R14: 0000000000000000 R15: 0000000000000000 [ 58.563585][ C0] Modules linked in: [ 58.563596][ C0] ---[ end trace 44ebcf0a34ee6c1b ]--- [ 58.563604][ C0] RIP: 0010:skb_release_data+0x232/0x910 [ 58.563610][ C0] Code: 48 c1 e8 03 42 80 3c 30 00 0f 85 ea 05 00 00 48 8b 0c 24 49 63 c4 48 c1 e0 04 48 8b 6c 08 30 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 ba 05 00 00 48 8b 5d 08 31 ff 49 89 dd 41 83 [ 58.563614][ C0] RSP: 0018:ffffc90000007a48 EFLAGS: 00010202 [ 58.563619][ C0] RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffff88809ede20c0 [ 58.563630][ C0] RDX: ffff888093d9e540 RSI: ffffffff8637bcf5 RDI: 0000000000000008 [ 58.563635][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ab267cf [ 58.563639][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 58.563644][ C0] R13: ffff88809ede20c0 R14: dffffc0000000000 R15: ffff88809ede20f0 [ 58.563652][ C0] FS: 00000000020bd880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 58.563657][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.563661][ C0] CR2: 00000000200004c0 CR3: 000000009f498000 CR4: 00000000001506f0 [ 58.563667][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.563672][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.563676][ C0] Kernel panic - not syncing: Fatal exception in interrupt [ 58.565352][ C0] Kernel Offset: disabled [ 59.510577][ C0] Rebooting in 86400 seconds..