[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.178879] device bridge0 entered promiscuous mode [ 42.308839] kasan: CONFIG_KASAN_INLINE enabled [ 42.313514] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.322568] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.328805] Modules linked in: [ 42.332020] CPU: 0 PID: 6360 Comm: syz-executor466 Not tainted 4.14.176-syzkaller #0 [ 42.339880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.349226] task: ffff888097030400 task.stack: ffff888098028000 [ 42.355309] RIP: 0010:vxlan_fdb_destroy+0xa3/0x1b0 [ 42.360221] RSP: 0018:ffff88809802f128 EFLAGS: 00010a02 [ 42.365566] RAX: dffffc0000000000 RBX: ffff888098279d80 RCX: 1ffff11013005e1b [ 42.372820] RDX: 1bd5a00000000040 RSI: ffff888098279d80 RDI: ffff8880976356c0 [ 42.380071] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 42.387321] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 42.394569] R13: ffff888098279d88 R14: ffff88809802f228 R15: ffff888097635580 [ 42.401818] FS: 00007fa3a6a23700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 42.410075] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.415978] CR2: 00007f5b3d85f740 CR3: 00000000a39da000 CR4: 00000000001406f0 [ 42.423273] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.430530] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.437782] Call Trace: [ 42.440354] __vxlan_dev_create+0x3bc/0x710 [ 42.444694] ? vxlan_nl2conf+0x1137/0x22a0 [ 42.448912] ? vxlan_changelink+0x660/0x660 [ 42.453217] ? vxlan_setup+0x4a0/0x4a0 [ 42.457086] ? kasan_unpoison_shadow+0x30/0x40 [ 42.461647] ? kasan_kmalloc+0xbf/0xe0 [ 42.465514] vxlan_newlink+0xa3/0xe0 [ 42.469219] ? __vxlan_dev_create+0x710/0x710 [ 42.473710] ? kvmalloc_node+0x4e/0xd0 [ 42.477603] ? rtnl_create_link+0x129/0x880 [ 42.481956] rtnl_newlink+0xecb/0x1720 [ 42.485832] ? __vxlan_dev_create+0x710/0x710 [ 42.490308] ? rtnl_link_unregister+0x1f0/0x1f0 [ 42.494959] ? lock_acquire+0x170/0x3f0 [ 42.498919] ? lock_acquire+0x170/0x3f0 [ 42.502876] ? __lock_is_held+0xad/0x140 [ 42.506915] ? lock_downgrade+0x6e0/0x6e0 [ 42.511081] ? rtnl_link_unregister+0x1f0/0x1f0 [ 42.515734] rtnetlink_rcv_msg+0x3be/0xb10 [ 42.519951] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 42.524510] ? save_trace+0x290/0x290 [ 42.528287] ? save_trace+0x290/0x290 [ 42.532069] netlink_rcv_skb+0x127/0x370 [ 42.536104] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 42.540665] ? netlink_ack+0x980/0x980 [ 42.544527] netlink_unicast+0x437/0x620 [ 42.548652] ? netlink_attachskb+0x600/0x600 [ 42.553082] netlink_sendmsg+0x733/0xbe0 [ 42.557164] ? netlink_unicast+0x620/0x620 [ 42.561375] ? __lock_is_held+0xad/0x140 [ 42.565416] ? security_socket_sendmsg+0x83/0xb0 [ 42.570148] ? netlink_unicast+0x620/0x620 [ 42.574372] sock_sendmsg+0xc5/0x100 [ 42.578150] sock_no_sendpage+0xe5/0x110 [ 42.582185] ? sock_kzfree_s+0x50/0x50 [ 42.586051] ? sock_kzfree_s+0x50/0x50 [ 42.589928] kernel_sendpage+0x82/0xd0 [ 42.593790] sock_sendpage+0x84/0xa0 [ 42.597535] pipe_to_sendpage+0x226/0x2d0 [ 42.601695] ? kernel_sendpage+0xd0/0xd0 [ 42.605733] ? direct_splice_actor+0x160/0x160 [ 42.610293] ? splice_from_pipe_next.part.0+0x1e4/0x290 [ 42.615646] __splice_from_pipe+0x332/0x740 [ 42.619957] ? direct_splice_actor+0x160/0x160 [ 42.624517] ? direct_splice_actor+0x160/0x160 [ 42.629078] splice_from_pipe+0xc6/0x120 [ 42.633163] ? splice_shrink_spd+0xb0/0xb0 [ 42.637417] ? rw_verify_area+0xe1/0x2a0 [ 42.641459] ? splice_from_pipe+0x120/0x120 [ 42.645774] SyS_splice+0xca0/0x1230 [ 42.649483] ? lock_downgrade+0x6e0/0x6e0 [ 42.653616] ? compat_SyS_vmsplice+0x250/0x250 [ 42.658177] ? do_syscall_64+0x4c/0x640 [ 42.662126] ? compat_SyS_vmsplice+0x250/0x250 [ 42.666681] do_syscall_64+0x1d5/0x640 [ 42.670547] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 42.675758] RIP: 0033:0x44a249 [ 42.678938] RSP: 002b:00007fa3a6a22cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 42.686621] RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 000000000044a249 [ 42.693921] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004 [ 42.701219] RBP: 00000000006dbc50 R08: 000000000004ffe2 R09: 0000000000000000 [ 42.708467] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 42.715719] R13: 00007ffdef083abf R14: 00007fa3a6a239c0 R15: 20c49ba5e353f7cf [ 42.722969] Code: 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 fe 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 08 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 00 00 00 48 85 ed 49 89 2c 24 74 28 e8 95 [ 42.742048] RIP: vxlan_fdb_destroy+0xa3/0x1b0 RSP: ffff88809802f128 [ 42.749395] ---[ end trace d7fe6e8df75cb1c7 ]--- [ 42.754162] Kernel panic - not syncing: Fatal exception [ 42.760855] Kernel Offset: disabled [ 42.764472] Rebooting in 86400 seconds..