Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 29.079828] kasan: CONFIG_KASAN_INLINE enabled [ 29.084457] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.093002] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.099228] Modules linked in: [ 29.102400] CPU: 0 PID: 7979 Comm: syz-executor596 Not tainted 4.14.260-syzkaller #0 [ 29.110254] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.119583] task: ffff8880947c00c0 task.stack: ffff8880a2f18000 [ 29.125617] RIP: 0010:vxlan_fdb_destroy+0xb4/0x1f0 [ 29.130516] RSP: 0018:ffff8880a2f1f150 EFLAGS: 00010a02 [ 29.135947] RAX: dffffc0000000000 RBX: ffff8880a08b7900 RCX: 1ffff110145e3e20 [ 29.143197] RDX: 1bd5a00000000040 RSI: ffff8880a08b7900 RDI: ffff8880a08b7908 [ 29.150447] RBP: 0000000000000000 R08: ffffffff8b9b7b70 R09: 0000000000000000 [ 29.157709] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 29.164950] R13: 0000000000000000 R14: ffff8880a2f1f250 R15: ffff8880b35be840 [ 29.172193] FS: 00007f8b59785700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 29.180389] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.186241] CR2: 00007f4e53296020 CR3: 00000000a9581000 CR4: 00000000003406f0 [ 29.193485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.200726] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.207971] Call Trace: [ 29.210539] __vxlan_dev_create+0x3b0/0x710 [ 29.214835] ? vxlan_fdb_add+0x2e0/0x2e0 [ 29.218876] ? vxlan_setup+0x460/0x460 [ 29.222736] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.227734] ? kmem_cache_alloc_node_trace+0x383/0x400 [ 29.233016] vxlan_newlink+0xa3/0xe0 [ 29.236715] ? __vxlan_dev_create+0x710/0x710 [ 29.241187] ? rtnl_create_link+0x129/0x890 [ 29.245484] rtnl_newlink+0xfab/0x1860 [ 29.249352] ? __lock_acquire+0x5fc/0x3f20 [ 29.253877] ? __vxlan_dev_create+0x710/0x710 [ 29.258348] ? rtnl_dellink+0x6a0/0x6a0 [ 29.262295] ? trace_hardirqs_on+0x10/0x10 [ 29.266606] ? get_page_from_freelist+0xaf6/0x2560 [ 29.271506] ? trace_hardirqs_on+0x10/0x10 [ 29.275985] ? deref_stack_reg+0x124/0x1a0 [ 29.280210] ? lock_acquire+0x170/0x3f0 [ 29.284157] ? lock_downgrade+0x740/0x740 [ 29.288277] ? rtnl_dellink+0x6a0/0x6a0 [ 29.292224] rtnetlink_rcv_msg+0x3be/0xb10 [ 29.296433] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 29.300898] ? __netlink_lookup+0x345/0x5d0 [ 29.305194] netlink_rcv_skb+0x125/0x390 [ 29.309228] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 29.313707] ? netlink_ack+0x9a0/0x9a0 [ 29.317568] netlink_unicast+0x437/0x610 [ 29.321606] ? netlink_sendskb+0xd0/0xd0 [ 29.325640] ? __check_object_size+0x179/0x230 [ 29.330199] netlink_sendmsg+0x648/0xbc0 [ 29.334231] ? nlmsg_notify+0x1b0/0x1b0 [ 29.338198] ? security_socket_sendmsg+0x83/0xb0 [ 29.342940] ? nlmsg_notify+0x1b0/0x1b0 [ 29.346888] sock_sendmsg+0xb5/0x100 [ 29.350576] sock_no_sendpage+0xe2/0x110 [ 29.354714] ? __sk_mem_schedule+0xd0/0xd0 [ 29.358945] ? __sk_mem_schedule+0xd0/0xd0 [ 29.363166] sock_sendpage+0xdf/0x140 [ 29.367033] pipe_to_sendpage+0x226/0x2d0 [ 29.371161] ? sockfs_setattr+0x140/0x140 [ 29.375285] ? direct_splice_actor+0x160/0x160 [ 29.381492] __splice_from_pipe+0x326/0x7a0 [ 29.385863] ? direct_splice_actor+0x160/0x160 [ 29.390469] generic_splice_sendpage+0xc1/0x110 [ 29.395119] ? vmsplice_to_user+0x1b0/0x1b0 [ 29.399427] ? rw_verify_area+0xe1/0x2a0 [ 29.403472] ? vmsplice_to_user+0x1b0/0x1b0 [ 29.407768] SyS_splice+0xd59/0x1380 [ 29.411463] ? finish_task_switch+0x47a/0x610 [ 29.415981] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.420968] ? compat_SyS_vmsplice+0x150/0x150 [ 29.425523] ? do_syscall_64+0x4c/0x640 [ 29.429469] ? compat_SyS_vmsplice+0x150/0x150 [ 29.434033] do_syscall_64+0x1d5/0x640 [ 29.437900] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.443076] RIP: 0033:0x7f8b59814fe9 [ 29.446760] RSP: 002b:00007f8b597852f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 29.454518] RAX: ffffffffffffffda RBX: 00007f8b5989d448 RCX: 00007f8b59814fe9 [ 29.461763] RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000006 [ 29.469012] RBP: 00007f8b5989d440 R08: 000000000004fff1 R09: 0000000000000000 [ 29.476255] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8b5989d44c [ 29.483511] R13: 00007f8b5986b004 R14: 0000006e616c7876 R15: 0000000000022000 [ 29.490844] Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 11 01 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 09 01 00 00 48 85 ed 49 89 2c 24 74 28 e8 d4 [ 29.509917] RIP: vxlan_fdb_destroy+0xb4/0x1f0 RSP: ffff8880a2f1f150 [ 29.525800] ---[ end trace 78c3d4b1b3c5d2e2 ]--- [ 29.525806] Kernel panic - not syncing: Fatal exception [ 29.525871] Kernel Offset: disabled [ 29.539556] Rebooting in 86400 seconds..