[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.147015] netlink: 20 bytes leftover after parsing attributes in process `syz-executor021'. [ 33.156005] netlink: 12 bytes leftover after parsing attributes in process `syz-executor021'. [ 33.227086] kasan: CONFIG_KASAN_INLINE enabled [ 33.231799] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.240309] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.246548] CPU: 1 PID: 8066 Comm: syz-executor021 Not tainted 4.19.172-syzkaller #0 [ 33.254528] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.263874] RIP: 0010:vxlan_fdb_destroy+0xbe/0x1f0 [ 33.268784] Code: 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 2a a1 [ 33.287764] RSP: 0018:ffff8880962eed90 EFLAGS: 00010a02 [ 33.293106] RAX: dffffc0000000000 RBX: ffff8880ab243a80 RCX: ffffffff844db81e [ 33.300358] RDX: 1bd5a00000000040 RSI: ffffffff844db82c RDI: ffff8880ab243a88 [ 33.307610] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.314891] R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000200 [ 33.322159] R13: 0000000000000000 R14: ffff8880962eeeb0 R15: ffff88809525cb40 [ 33.329418] FS: 00007feecff07700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.337642] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.343501] CR2: 00007f645ce7c000 CR3: 00000000b0c81000 CR4: 00000000001406e0 [ 33.350750] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.357998] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.365258] Call Trace: [ 33.367834] __vxlan_dev_create+0x477/0x820 [ 33.372158] ? vxlan_fdb_add+0x340/0x340 [ 33.376198] ? vxlan_setup+0x400/0x400 [ 33.380069] ? __kmalloc_node+0x38/0x70 [ 33.384044] vxlan_newlink+0xc0/0x120 [ 33.387829] ? __vxlan_dev_create+0x820/0x820 [ 33.392397] ? memset+0x20/0x40 [ 33.395669] ? rtnl_create_link+0x145/0xa40 [ 33.399972] ? __vxlan_dev_create+0x820/0x820 [ 33.404442] rtnl_newlink+0x1027/0x15b0 [ 33.408402] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 33.414263] ? rtnl_getlink+0x620/0x620 [ 33.418232] ? __save_stack_trace+0x72/0x190 [ 33.422617] ? deref_stack_reg+0x134/0x1d0 [ 33.426843] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 33.432718] ? deref_stack_reg+0x1d0/0x1d0 [ 33.436932] ? lock_downgrade+0x720/0x720 [ 33.441144] ? unwind_next_frame+0x10a9/0x1c60 [ 33.445705] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.451044] ? bpf_prog_kallsyms_find.part.0+0x1ad/0x270 [ 33.456470] ? is_bpf_text_address+0xfc/0x1b0 [ 33.460963] ? kernel_text_address+0xbd/0xf0 [ 33.465359] ? __kernel_text_address+0x9/0x30 [ 33.469837] ? unwind_get_return_address+0x51/0x90 [ 33.474753] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.480093] ? __save_stack_trace+0xaf/0x190 [ 33.484498] ? __lock_acquire+0x6de/0x3ff0 [ 33.488726] ? mark_held_locks+0xf0/0xf0 [ 33.492777] ? __mutex_add_waiter+0x160/0x160 [ 33.497251] ? rtnetlink_rcv_msg+0x3c3/0xb80 [ 33.501645] ? rtnl_getlink+0x620/0x620 [ 33.505597] rtnetlink_rcv_msg+0x453/0xb80 [ 33.509809] ? rtnl_calcit.isra.0+0x430/0x430 [ 33.514295] ? __netlink_lookup+0x3fc/0x730 [ 33.518597] ? lock_downgrade+0x720/0x720 [ 33.522737] ? check_preemption_disabled+0x41/0x280 [ 33.527734] netlink_rcv_skb+0x160/0x440 [ 33.531787] ? rtnl_calcit.isra.0+0x430/0x430 [ 33.536259] ? netlink_ack+0xae0/0xae0 [ 33.540129] netlink_unicast+0x4d5/0x690 [ 33.544184] ? netlink_sendskb+0x110/0x110 [ 33.548413] ? _copy_from_iter_full+0x229/0x7c0 [ 33.553079] ? __phys_addr_symbol+0x2c/0x70 [ 33.557409] ? __check_object_size+0x17b/0x3e0 [ 33.561978] netlink_sendmsg+0x6bb/0xc40 [ 33.566017] ? aa_af_perm+0x230/0x230 [ 33.569805] ? nlmsg_notify+0x1a0/0x1a0 [ 33.573757] ? nlmsg_notify+0x1a0/0x1a0 [ 33.577731] sock_sendmsg+0xc3/0x120 [ 33.581423] sock_no_sendpage+0xf5/0x140 [ 33.585481] ? __sk_mem_schedule+0xd0/0xd0 [ 33.589706] ? pipe_lock+0x63/0x80 [ 33.593228] ? __sk_mem_schedule+0xd0/0xd0 [ 33.597472] sock_sendpage+0xdf/0x140 [ 33.601276] pipe_to_sendpage+0x268/0x330 [ 33.605411] ? sockfs_setattr+0x160/0x160 [ 33.609544] ? direct_splice_actor+0x160/0x160 [ 33.614121] ? splice_from_pipe_next.part.0+0x2ad/0x360 [ 33.619471] __splice_from_pipe+0x389/0x800 [ 33.623772] ? direct_splice_actor+0x160/0x160 [ 33.628335] generic_splice_sendpage+0xd4/0x140 [ 33.632980] ? __splice_from_pipe+0x800/0x800 [ 33.637469] ? security_file_permission+0x1c0/0x220 [ 33.642478] ? __splice_from_pipe+0x800/0x800 [ 33.647315] __se_sys_splice+0xfe7/0x16d0 [ 33.651480] ? lock_acquire+0x170/0x3c0 [ 33.655471] ? ret_from_fork+0x8/0x30 [ 33.659256] ? __se_sys_tee+0xb90/0xb90 [ 33.663231] ? trace_hardirqs_off_caller+0x6e/0x210 [ 33.668247] ? do_syscall_64+0x21/0x620 [ 33.672221] do_syscall_64+0xf9/0x620 [ 33.676095] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.681271] RIP: 0033:0x444dc9 [ 33.684550] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 14 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 33.703442] RSP: 002b:00007feecff072f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 33.711136] RAX: ffffffffffffffda RBX: 00000000004ca458 RCX: 0000000000444dc9 [ 33.718389] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004 [ 33.725640] RBP: 00000000004ca450 R08: 000000000004ffe2 R09: 0000000000000000 [ 33.732892] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ca45c [ 33.740144] R13: 000000000049a004 R14: 0000006e616c7876 R15: 0000000000022000 [ 33.747742] Modules linked in: [ 33.757345] ---[ end trace 5859c0738bc0a1f4 ]--- [ 33.762131] RIP: 0010:vxlan_fdb_destroy+0xbe/0x1f0 [ 33.767152] Code: 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 2a a1 [ 33.786765] RSP: 0018:ffff8880962eed90 EFLAGS: 00010a02 [ 33.792191] RAX: dffffc0000000000 RBX: ffff8880ab243a80 RCX: ffffffff844db81e [ 33.799520] RDX: 1bd5a00000000040 RSI: ffffffff844db82c RDI: ffff8880ab243a88 [ 33.806783] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.814116] R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000200 [ 33.821963] R13: 0000000000000000 R14: ffff8880962eeeb0 R15: ffff88809525cb40 [ 33.829814] FS: 00007feecff07700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 33.838101] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.844237] CR2: 00007f3578037098 CR3: 00000000b0c81000 CR4: 00000000001406f0 [ 33.851633] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.858970] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.866245] Kernel panic - not syncing: Fatal exception [ 33.872155] Kernel Offset: disabled [ 33.875767] Rebooting in 86400 seconds..