[ 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 '10.128.0.215' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.025949] device bridge0 entered promiscuous mode [ 40.150888] kasan: CONFIG_KASAN_INLINE enabled [ 40.156126] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.166809] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.173065] CPU: 0 PID: 6472 Comm: syz-executor599 Not tainted 4.19.115-syzkaller #0 [ 40.180947] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.190324] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 40.195259] 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 [ 40.214321] RSP: 0018:ffff8880a564ed20 EFLAGS: 00010a02 [ 40.219685] RAX: dffffc0000000000 RBX: ffff88809969bc00 RCX: ffffffff84547b4d [ 40.226944] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 40.234208] RBP: 0000000000000000 R08: ffff888084e66080 R09: 0000000000000000 [ 40.241467] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 40.248727] R13: ffff88809969bc08 R14: ffff8880a564ee40 R15: ffff8880a4941880 [ 40.255988] FS: 00007f7a573e6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 40.264254] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.270123] CR2: 00007f971d6bb710 CR3: 00000000a4c2d000 CR4: 00000000001406f0 [ 40.277384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.284676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.291997] Call Trace: [ 40.294617] __vxlan_dev_create+0x48d/0x840 [ 40.298933] ? vxlan_changelink+0x740/0x740 [ 40.303252] ? vxlan_setup+0x440/0x440 [ 40.307136] ? kmem_cache_alloc_node_trace+0x34d/0x750 [ 40.312408] vxlan_newlink+0xc0/0x120 [ 40.316202] ? __vxlan_dev_create+0x840/0x840 [ 40.320691] ? memset+0x20/0x40 [ 40.323970] ? rtnl_create_link+0x145/0xa30 [ 40.328284] ? __vxlan_dev_create+0x840/0x840 [ 40.332772] rtnl_newlink+0xf03/0x1440 [ 40.336655] ? rtnl_link_unregister+0x230/0x230 [ 40.341334] ? deref_stack_reg+0xaa/0xe0 [ 40.345447] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 40.351332] ? lock_downgrade+0x740/0x740 [ 40.355485] ? unwind_next_frame+0xd01/0x18a0 [ 40.360002] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.365368] ? bpf_prog_kallsyms_find+0x4d/0x2a0 [ 40.370124] ? check_preemption_disabled+0x41/0x280 [ 40.375141] ? is_bpf_text_address+0xd0/0x160 [ 40.379634] ? kernel_text_address+0x6e/0xe0 [ 40.384036] ? __kernel_text_address+0x9/0x30 [ 40.388571] ? unwind_get_return_address+0x5a/0xa0 [ 40.393616] ? __save_stack_trace+0x8a/0xf0 [ 40.397943] ? mark_held_locks+0xf0/0xf0 [ 40.402112] ? lock_downgrade+0x740/0x740 [ 40.406277] ? mutex_trylock+0x1a0/0x1a0 [ 40.410331] ? find_held_lock+0x2d/0x110 [ 40.414433] ? rtnetlink_rcv_msg+0x3c3/0xaf0 [ 40.418840] ? rtnl_link_unregister+0x230/0x230 [ 40.423517] rtnetlink_rcv_msg+0x453/0xaf0 [ 40.427752] ? rtnetlink_put_metrics+0x520/0x520 [ 40.432590] ? find_held_lock+0x2d/0x110 [ 40.436649] netlink_rcv_skb+0x160/0x410 [ 40.440703] ? rtnetlink_put_metrics+0x520/0x520 [ 40.445452] ? netlink_ack+0xa60/0xa60 [ 40.449353] netlink_unicast+0x4d7/0x6a0 [ 40.453423] ? netlink_attachskb+0x710/0x710 [ 40.457836] netlink_sendmsg+0x80b/0xcd0 [ 40.461905] ? netlink_unicast+0x6a0/0x6a0 [ 40.466157] ? netlink_unicast+0x6a0/0x6a0 [ 40.470388] sock_sendmsg+0xcf/0x120 [ 40.474107] sock_no_sendpage+0xf8/0x140 [ 40.478165] ? sock_kzfree_s+0x60/0x60 [ 40.482073] ? lock_downgrade+0x740/0x740 [ 40.486231] ? pipe_lock+0x63/0x80 [ 40.489781] ? lock_acquire+0x170/0x400 [ 40.493756] ? pipe_lock+0x63/0x80 [ 40.497296] ? sock_kzfree_s+0x60/0x60 [ 40.501189] kernel_sendpage+0x82/0xd0 [ 40.505097] sock_sendpage+0x84/0xa0 [ 40.508807] pipe_to_sendpage+0x263/0x320 [ 40.512951] ? kernel_sendpage+0xd0/0xd0 [ 40.517115] ? direct_splice_actor+0x160/0x160 [ 40.521712] ? splice_from_pipe_next.part.0+0x24f/0x2f0 [ 40.527070] __splice_from_pipe+0x38f/0x7a0 [ 40.531395] ? direct_splice_actor+0x160/0x160 [ 40.535969] ? direct_splice_actor+0x160/0x160 [ 40.540549] splice_from_pipe+0xd9/0x140 [ 40.544698] ? splice_shrink_spd+0xc0/0xc0 [ 40.548928] ? security_file_permission+0x84/0x220 [ 40.553858] ? splice_from_pipe+0x140/0x140 [ 40.558172] do_splice+0x5ea/0x1250 [ 40.561792] ? iterate_fd+0x350/0x350 [ 40.565592] ? opipe_prep.part.0+0x2c0/0x2c0 [ 40.569999] ? find_held_lock+0x2d/0x110 [ 40.574063] __x64_sys_splice+0x2b5/0x320 [ 40.578219] do_syscall_64+0xf9/0x620 [ 40.582012] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.587191] RIP: 0033:0x44a229 [ 40.590382] Code: 7d d6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 4b d6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 40.609279] RSP: 002b:00007f7a573e5cd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 40.616985] RAX: ffffffffffffffda RBX: 00000000006dbc58 RCX: 000000000044a229 [ 40.624251] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000004 [ 40.631516] RBP: 00000000006dbc50 R08: 000000000004ffe2 R09: 0000000000000000 [ 40.638904] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 40.646171] R13: 00007ffff61156cf R14: 00007f7a573e69c0 R15: 20c49ba5e353f7cf [ 40.653433] Modules linked in: [ 40.659000] ---[ end trace e627cf80500375fa ]--- [ 40.664000] RIP: 0010:vxlan_fdb_destroy+0xad/0x1c0 [ 40.668936] 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 [ 40.688175] RSP: 0018:ffff8880a564ed20 EFLAGS: 00010a02 [ 40.693682] RAX: dffffc0000000000 RBX: ffff88809969bc00 RCX: ffffffff84547b4d [ 40.701067] RDX: 1bd5a00000000040 RSI: ffffffff84547b5b RDI: 0000000000000001 [ 40.708505] RBP: 0000000000000000 R08: ffff888084e66080 R09: 0000000000000000 [ 40.715885] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200 [ 40.723203] R13: ffff88809969bc08 R14: ffff8880a564ee40 R15: ffff8880a4941880 [ 40.730476] FS: 00007f7a573e6700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 40.738750] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.744662] CR2: 00007f971d6bb710 CR3: 00000000a4c2d000 CR4: 00000000001406f0 [ 40.751935] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.759299] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.766658] Kernel panic - not syncing: Fatal exception [ 40.773529] Kernel Offset: disabled [ 40.777158] Rebooting in 86400 seconds..