[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.748610] kasan: CONFIG_KASAN_INLINE enabled [ 39.753358] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.768288] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.774580] CPU: 1 PID: 6460 Comm: syz-executor582 Not tainted 4.19.115-syzkaller #0 [ 39.782570] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.791945] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 39.796915] Code: 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 ab 28 [ 39.815855] RSP: 0018:ffff8880a522ed20 EFLAGS: 00010a02 [ 39.821202] RAX: dffffc0000000000 RBX: ffff88808c43fd80 RCX: ffffffff84547b4d [ 39.828470] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 39.835770] RBP: 0000000000000000 R08: ffff8880a4d8a040 R09: 0000000000000000 [ 39.843039] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 39.850312] R13: ffff88808c43fd88 R14: ffff8880a522ee40 R15: ffff8880a4a01680 [ 39.857566] FS: 00007f5431487700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 39.865773] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.871636] CR2: 0000557572c73310 CR3: 00000000a3cc2000 CR4: 00000000001406e0 [ 39.878887] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.886150] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.893416] Call Trace: [ 39.895997] __vxlan_dev_create+0x48d/0x840 [ 39.900362] ? vxlan_changelink+0x740/0x740 [ 39.904670] ? vxlan_setup+0x440/0x440 [ 39.908560] ? kmem_cache_alloc_node_trace+0x34d/0x750 [ 39.913829] vxlan_newlink+0xc0/0x120 [ 39.917642] ? __vxlan_dev_create+0x840/0x840 [ 39.922124] ? memset+0x20/0x40 [ 39.925414] ? rtnl_create_link+0x145/0xa30 [ 39.929730] ? __vxlan_dev_create+0x840/0x840 [ 39.934208] rtnl_newlink+0xf03/0x1440 [ 39.938080] ? rtnl_link_unregister+0x230/0x230 [ 39.942731] ? deref_stack_reg+0xaa/0xe0 [ 39.946789] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 39.952798] ? lock_downgrade+0x740/0x740 [ 39.956983] ? unwind_next_frame+0xd01/0x18a0 [ 39.961472] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.966828] ? bpf_prog_kallsyms_find+0x4d/0x2a0 [ 39.971587] ? check_preemption_disabled+0x41/0x280 [ 39.976598] ? is_bpf_text_address+0xd0/0x160 [ 39.981091] ? kernel_text_address+0x6e/0xe0 [ 39.985498] ? __kernel_text_address+0x9/0x30 [ 39.989974] ? unwind_get_return_address+0x5a/0xa0 [ 39.994900] ? __save_stack_trace+0x8a/0xf0 [ 39.999235] ? mark_held_locks+0xf0/0xf0 [ 40.003302] ? lock_downgrade+0x740/0x740 [ 40.007461] ? mutex_trylock+0x1a0/0x1a0 [ 40.011510] ? find_held_lock+0x2d/0x110 [ 40.015600] ? rtnetlink_rcv_msg+0x3c3/0xaf0 [ 40.019998] ? rtnl_link_unregister+0x230/0x230 [ 40.024691] rtnetlink_rcv_msg+0x453/0xaf0 [ 40.029092] ? rtnetlink_put_metrics+0x520/0x520 [ 40.033891] ? find_held_lock+0x2d/0x110 [ 40.037951] netlink_rcv_skb+0x160/0x410 [ 40.042020] ? rtnetlink_put_metrics+0x520/0x520 [ 40.046759] ? netlink_ack+0xa60/0xa60 [ 40.050633] netlink_unicast+0x4d7/0x6a0 [ 40.054789] ? netlink_attachskb+0x710/0x710 [ 40.059353] netlink_sendmsg+0x80b/0xcd0 [ 40.063403] ? netlink_unicast+0x6a0/0x6a0 [ 40.067626] ? netlink_unicast+0x6a0/0x6a0 [ 40.071849] sock_sendmsg+0xcf/0x120 [ 40.075549] sock_no_sendpage+0xf8/0x140 [ 40.079594] ? sock_kzfree_s+0x60/0x60 [ 40.083466] ? lock_downgrade+0x740/0x740 [ 40.087619] ? pipe_lock+0x63/0x80 [ 40.091199] ? lock_acquire+0x170/0x400 [ 40.095168] ? pipe_lock+0x63/0x80 [ 40.098696] ? sock_kzfree_s+0x60/0x60 [ 40.102583] kernel_sendpage+0x82/0xd0 [ 40.106458] sock_sendpage+0x84/0xa0 [ 40.110155] pipe_to_sendpage+0x263/0x320 [ 40.114285] ? kernel_sendpage+0xd0/0xd0 [ 40.118330] ? direct_splice_actor+0x160/0x160 [ 40.122894] ? splice_from_pipe_next.part.0+0x24f/0x2f0 [ 40.128243] __splice_from_pipe+0x38f/0x7a0 [ 40.132546] ? direct_splice_actor+0x160/0x160 [ 40.137134] ? direct_splice_actor+0x160/0x160 [ 40.141710] splice_from_pipe+0xd9/0x140 [ 40.145753] ? splice_shrink_spd+0xc0/0xc0 [ 40.149983] ? security_file_permission+0x84/0x220 [ 40.154912] ? splice_from_pipe+0x140/0x140 [ 40.159219] do_splice+0x5ea/0x1250 [ 40.162878] ? iterate_fd+0x350/0x350 [ 40.166664] ? opipe_prep.part.0+0x2c0/0x2c0 [ 40.171128] ? find_held_lock+0x2d/0x110 [ 40.175295] __x64_sys_splice+0x2b5/0x320 [ 40.179591] do_syscall_64+0xf9/0x620 [ 40.183417] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.188658] RIP: 0033:0x445ac9 [ 40.191846] Code: e8 bc b7 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 2b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.210745] RSP: 002b:00007f5431486d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 40.218435] RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445ac9 [ 40.225686] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004 [ 40.232947] RBP: 00000000006dac50 R08: 000000000004ffe2 R09: 0000000000000000 [ 40.240198] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c [ 40.247447] R13: 0000000000000000 R14: 0000000000000000 R15: 0705001000000048 [ 40.254703] Modules linked in: [ 40.258640] ---[ end trace de40c5f699b158df ]--- [ 40.263494] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 40.269163] Code: 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 ab 28 [ 40.288232] RSP: 0018:ffff8880a522ed20 EFLAGS: 00010a02 [ 40.293653] RAX: dffffc0000000000 RBX: ffff88808c43fd80 RCX: ffffffff84547b4d [ 40.300998] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 40.308331] RBP: 0000000000000000 R08: ffff8880a4d8a040 R09: 0000000000000000 [ 40.315651] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 40.322927] R13: ffff88808c43fd88 R14: ffff8880a522ee40 R15: ffff8880a4a01680 [ 40.330266] FS: 00007f5431487700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 40.338536] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.344445] CR2: 0000557572c73310 CR3: 00000000a3cc2000 CR4: 00000000001406e0 [ 40.351718] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.359036] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.366354] Kernel panic - not syncing: Fatal exception [ 40.373144] Kernel Offset: disabled [ 40.376775] Rebooting in 86400 seconds..