[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.493647][ T23] audit: type=1800 audit(1579518984.278:25): pid=8557 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.517835][ T23] audit: type=1800 audit(1579518984.288:26): pid=8557 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.565443][ T23] audit: type=1800 audit(1579518984.288:27): pid=8557 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.104' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.062060][ T8708] IPVS: ftp: loaded support on port[0] = 21 [ 68.105068][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.114050][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.122417][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.130654][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.138876][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. executing program [ 68.147688][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.155971][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.164420][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.172687][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.181048][ T8709] netlink: 'syz-executor453': attribute type 1 has an invalid length. [ 68.231239][ T8710] BUG: unable to handle page fault for address: ffff887fa3393fff [ 68.238981][ T8710] #PF: supervisor read access in kernel mode [ 68.245084][ T8710] #PF: error_code(0x0000) - not-present page [ 68.251055][ T8710] PGD 0 P4D 0 [ 68.254439][ T8710] Oops: 0000 [#1] PREEMPT SMP KASAN [ 68.259629][ T8710] CPU: 0 PID: 8710 Comm: syz-executor453 Not tainted 5.5.0-rc7-syzkaller #0 [ 68.268323][ T8710] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.278388][ T8710] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 68.284877][ T8710] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 68.304912][ T8710] RSP: 0018:ffffc90000ef7958 EFLAGS: 00010246 [ 68.310971][ T8710] RAX: 1ffff10ff46727ff RBX: ffff887fa3393fff RCX: 0000000000000100 [ 68.319062][ T8710] RDX: ffff88809d819330 RSI: 0000000000000000 RDI: ffffc90000ef7a88 [ 68.327131][ T8710] RBP: ffffc90000ef7a78 R08: ffffffff86527ef6 R09: ffffed101467085d [ 68.335193][ T8710] R10: ffffed101467085d R11: 0000000000000000 R12: ffff88809d819388 [ 68.343255][ T8710] R13: ffff88809d8192c0 R14: ffff8880a3384000 R15: dffffc0000000000 [ 68.351322][ T8710] FS: 000000000206f880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 68.360352][ T8710] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.366927][ T8710] CR2: ffff887fa3393fff CR3: 0000000093920000 CR4: 00000000001406f0 [ 68.374896][ T8710] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.382858][ T8710] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.390819][ T8710] Call Trace: [ 68.394388][ T8710] do_xdp_generic+0x39/0x110 [ 68.398986][ T8710] tun_get_user+0x1dfb/0x37b0 [ 68.403668][ T8710] ? rcu_lock_release+0x21/0x30 [ 68.408675][ T8710] tun_chr_write_iter+0xac/0x130 [ 68.413744][ T8710] do_iter_readv_writev+0x651/0x8e0 [ 68.418942][ T8710] do_iter_write+0x180/0x590 [ 68.423519][ T8710] ? import_iovec+0x122/0x2a0 [ 68.428179][ T8710] do_writev+0x239/0x490 [ 68.432505][ T8710] ? do_user_addr_fault+0x654/0xaf0 [ 68.437706][ T8710] ? check_preemption_disabled+0xb4/0x260 [ 68.443528][ T8710] ? debug_smp_processor_id+0x9/0x20 [ 68.448848][ T8710] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 68.454318][ T8710] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 68.460325][ T8710] ? do_syscall_64+0x1d/0x1c0 [ 68.464997][ T8710] __x64_sys_writev+0x7d/0x90 [ 68.469746][ T8710] do_syscall_64+0xf7/0x1c0 [ 68.474231][ T8710] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.480140][ T8710] RIP: 0033:0x442540 [ 68.484032][ T8710] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d f1 8a 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 68.503728][ T8710] RSP: 002b:00007ffc069a5428 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 68.512130][ T8710] RAX: ffffffffffffffda RBX: 00007ffc069a5440 RCX: 0000000000442540 [ 68.520141][ T8710] RDX: 0000000000000001 RSI: 00007ffc069a5470 RDI: 00000000000000f0 [ 68.528278][ T8710] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 68.536242][ T8710] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000109e2 [ 68.544392][ T8710] R13: 0000000000403390 R14: 0000000000000000 R15: 0000000000000000 [ 68.552443][ T8710] Modules linked in: [ 68.556484][ T8710] CR2: ffff887fa3393fff [ 68.560708][ T8710] ---[ end trace 78c0a8aecc5845e5 ]--- [ 68.566215][ T8710] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 68.572948][ T8710] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 68.592764][ T8710] RSP: 0018:ffffc90000ef7958 EFLAGS: 00010246 [ 68.598819][ T8710] RAX: 1ffff10ff46727ff RBX: ffff887fa3393fff RCX: 0000000000000100 [ 68.606789][ T8710] RDX: ffff88809d819330 RSI: 0000000000000000 RDI: ffffc90000ef7a88 [ 68.614754][ T8710] RBP: ffffc90000ef7a78 R08: ffffffff86527ef6 R09: ffffed101467085d [ 68.622711][ T8710] R10: ffffed101467085d R11: 0000000000000000 R12: ffff88809d819388 [ 68.630832][ T8710] R13: ffff88809d8192c0 R14: ffff8880a3384000 R15: dffffc0000000000 [ 68.638796][ T8710] FS: 000000000206f880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 68.648138][ T8710] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.654710][ T8710] CR2: ffff887fa3393fff CR3: 0000000093920000 CR4: 00000000001406f0 [ 68.662745][ T8710] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.670713][ T8710] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.678676][ T8710] Kernel panic - not syncing: Fatal exception in interrupt [ 68.687384][ T8710] Kernel Offset: disabled [ 68.691883][ T8710] Rebooting in 86400 seconds..