[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.896189] kasan: CONFIG_KASAN_INLINE enabled [ 42.901513] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.909536] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.915910] CPU: 0 PID: 6432 Comm: syz-executor686 Not tainted 4.19.115-syzkaller #0 [ 42.923892] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.934596] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 42.939530] 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 [ 42.958911] RSP: 0018:ffff888095eded20 EFLAGS: 00010a02 [ 42.964469] RAX: dffffc0000000000 RBX: ffff8880a7b6fc00 RCX: ffffffff84547b4d [ 42.971874] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 42.979157] RBP: 0000000000000000 R08: ffff8880a8b88200 R09: 0000000000000000 [ 42.986434] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 42.993796] R13: ffff8880a7b6fc08 R14: ffff888095edee40 R15: ffff888089d59500 [ 43.001165] FS: 00007f3a50ec7700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 43.009377] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.015460] CR2: 000056083cb7d230 CR3: 000000009ee95000 CR4: 00000000001406f0 [ 43.022825] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.030197] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.037466] Call Trace: [ 43.040143] __vxlan_dev_create+0x48d/0x840 [ 43.044461] ? vxlan_changelink+0x740/0x740 [ 43.048979] ? vxlan_setup+0x440/0x440 [ 43.052874] ? kmem_cache_alloc_node_trace+0x34d/0x750 [ 43.058144] vxlan_newlink+0xc0/0x120 [ 43.061942] ? __vxlan_dev_create+0x840/0x840 [ 43.066421] ? memset+0x20/0x40 [ 43.069697] ? rtnl_create_link+0x145/0xa30 [ 43.074000] ? __vxlan_dev_create+0x840/0x840 [ 43.078478] rtnl_newlink+0xf03/0x1440 [ 43.082350] ? rtnl_link_unregister+0x230/0x230 [ 43.087006] ? mark_held_locks+0xf0/0xf0 [ 43.091047] ? __lock_acquire+0x23a3/0x49c0 [ 43.095368] ? find_held_lock+0x2d/0x110 [ 43.099412] ? free_one_page+0x127/0xee0 [ 43.103469] ? lock_downgrade+0x740/0x740 [ 43.107604] ? lock_acquire+0x170/0x400 [ 43.111572] ? free_one_page+0x127/0xee0 [ 43.115636] ? find_held_lock+0x2d/0x110 [ 43.119718] ? __free_pages_ok+0x438/0xd80 [ 43.123959] ? finish_task_switch+0x532/0x780 [ 43.128440] ? switch_mm_irqs_off+0xbfd/0x13a0 [ 43.133141] ? __schedule+0x86e/0x1d80 [ 43.137023] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 43.142141] ? mutex_trylock+0x1a0/0x1a0 [ 43.146189] ? find_held_lock+0x2d/0x110 [ 43.150250] ? rtnetlink_rcv_msg+0x3c3/0xaf0 [ 43.154657] ? rtnl_link_unregister+0x230/0x230 [ 43.159310] rtnetlink_rcv_msg+0x453/0xaf0 [ 43.163534] ? rtnetlink_put_metrics+0x520/0x520 [ 43.168274] ? find_held_lock+0x2d/0x110 [ 43.172330] netlink_rcv_skb+0x160/0x410 [ 43.176527] ? rtnetlink_put_metrics+0x520/0x520 [ 43.181416] ? netlink_ack+0xa60/0xa60 [ 43.185299] netlink_unicast+0x4d7/0x6a0 [ 43.189466] ? netlink_attachskb+0x710/0x710 [ 43.193863] netlink_sendmsg+0x80b/0xcd0 [ 43.197910] ? netlink_unicast+0x6a0/0x6a0 [ 43.202139] ? netlink_unicast+0x6a0/0x6a0 [ 43.206590] sock_sendmsg+0xcf/0x120 [ 43.210350] sock_no_sendpage+0xf8/0x140 [ 43.214408] ? sock_kzfree_s+0x60/0x60 [ 43.218293] ? lock_downgrade+0x740/0x740 [ 43.222464] ? pipe_lock+0x63/0x80 [ 43.225992] ? lock_acquire+0x170/0x400 [ 43.230036] ? pipe_lock+0x63/0x80 [ 43.233566] ? sock_kzfree_s+0x60/0x60 [ 43.237437] kernel_sendpage+0x82/0xd0 [ 43.241395] sock_sendpage+0x84/0xa0 [ 43.245101] pipe_to_sendpage+0x263/0x320 [ 43.249244] ? kernel_sendpage+0xd0/0xd0 [ 43.253329] ? direct_splice_actor+0x160/0x160 [ 43.257908] ? splice_from_pipe_next.part.0+0x24f/0x2f0 [ 43.263262] __splice_from_pipe+0x38f/0x7a0 [ 43.267588] ? direct_splice_actor+0x160/0x160 [ 43.272154] ? direct_splice_actor+0x160/0x160 [ 43.276890] splice_from_pipe+0xd9/0x140 [ 43.280942] ? splice_shrink_spd+0xc0/0xc0 [ 43.285185] ? security_file_permission+0x84/0x220 [ 43.290119] ? splice_from_pipe+0x140/0x140 [ 43.295835] do_splice+0x5ea/0x1250 [ 43.299461] ? iterate_fd+0x350/0x350 [ 43.303256] ? opipe_prep.part.0+0x2c0/0x2c0 [ 43.307660] ? find_held_lock+0x2d/0x110 [ 43.311803] __x64_sys_splice+0x2b5/0x320 [ 43.315951] do_syscall_64+0xf9/0x620 [ 43.319753] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.324954] RIP: 0033:0x445ba9 [ 43.328147] 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 [ 43.347314] RSP: 002b:00007f3a50ec6d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 43.355009] RAX: ffffffffffffffda RBX: 00000000006dac58 RCX: 0000000000445ba9 [ 43.362272] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004 [ 43.369536] RBP: 00000000006dac50 R08: 000000000004ffe2 R09: 0000000000000000 [ 43.377662] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac5c [ 43.385294] R13: 0000000000000000 R14: 0000000000000000 R15: 0705001000000048 [ 43.392573] Modules linked in: [ 43.396085] ---[ end trace 7a3cd127152b2412 ]--- [ 43.400890] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 43.405919] 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 [ 43.432179] RSP: 0018:ffff888095eded20 EFLAGS: 00010a02 [ 43.437597] RAX: dffffc0000000000 RBX: ffff8880a7b6fc00 RCX: ffffffff84547b4d [ 43.445004] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 43.452702] RBP: 0000000000000000 R08: ffff8880a8b88200 R09: 0000000000000000 [ 43.460038] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 43.467399] R13: ffff8880a7b6fc08 R14: ffff888095edee40 R15: ffff888089d59500 [ 43.474680] FS: 00007f3a50ec7700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 43.482955] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.488938] CR2: 000056083cb7d230 CR3: 000000009ee95000 CR4: 00000000001406f0 [ 43.496371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.503842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.511248] Kernel panic - not syncing: Fatal exception [ 43.518072] Kernel Offset: disabled [ 43.521695] Rebooting in 86400 seconds..