[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.043425][ T27] audit: type=1800 audit(1579497557.647:25): pid=8605 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.066012][ T27] audit: type=1800 audit(1579497557.647:26): pid=8605 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.137432][ T27] audit: type=1800 audit(1579497557.647:27): pid=8605 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 '10.128.0.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.805572][ T8758] IPVS: ftp: loaded support on port[0] = 21 [ 81.847091][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.855465][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.864432][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.873055][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.881352][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.889563][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.897802][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.906005][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.914263][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.922810][ T8758] netlink: 'syz-executor900': attribute type 1 has an invalid length. [ 81.931435][ T8758] BUG: unable to handle page fault for address: ffff887f9dabafff [ 81.939467][ T8758] #PF: supervisor read access in kernel mode [ 81.945436][ T8758] #PF: error_code(0x0000) - not-present page [ 81.951398][ T8758] PGD 0 P4D 0 [ 81.954778][ T8758] Oops: 0000 [#1] PREEMPT SMP KASAN [ 81.959978][ T8758] CPU: 0 PID: 8758 Comm: syz-executor900 Not tainted 5.5.0-rc6-syzkaller #0 [ 81.968792][ T8758] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.981862][ T8758] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 81.988349][ T8758] Code: 74 08 48 89 df e8 d4 3f 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 14 3f 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 82.008496][ T8758] RSP: 0018:ffffc90002047958 EFLAGS: 00010246 [ 82.014721][ T8758] RAX: 1ffff10ff3b575ff RBX: ffff887f9dabafff RCX: 0000000000000100 [ 82.023156][ T8758] RDX: ffff8880a9e727f0 RSI: 0000000000000000 RDI: ffffc90002047a88 [ 82.031291][ T8758] RBP: ffffc90002047a78 R08: ffffffff86527ef6 R09: ffffed1013b5565d [ 82.039256][ T8758] R10: ffffed1013b5565d R11: 0000000000000000 R12: ffff8880a9e72848 [ 82.047296][ T8758] R13: ffff8880a9e72780 R14: ffff88809daab000 R15: dffffc0000000000 [ 82.055354][ T8758] FS: 00000000017e8880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 82.064275][ T8758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.070834][ T8758] CR2: ffff887f9dabafff CR3: 0000000094791000 CR4: 00000000001406f0 [ 82.078892][ T8758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.086854][ T8758] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.095070][ T8758] Call Trace: [ 82.098357][ T8758] do_xdp_generic+0x39/0x110 [ 82.103684][ T8758] tun_get_user+0x1dfb/0x37b0 [ 82.108345][ T8758] ? rcu_lock_release+0x21/0x30 [ 82.113259][ T8758] tun_chr_write_iter+0xac/0x130 [ 82.118202][ T8758] do_iter_readv_writev+0x651/0x8e0 [ 82.123520][ T8758] do_iter_write+0x180/0x590 [ 82.128117][ T8758] ? import_iovec+0x122/0x2a0 [ 82.132781][ T8758] do_writev+0x239/0x490 [ 82.137022][ T8758] ? prepare_exit_to_usermode+0x221/0x5b0 [ 82.142724][ T8758] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 82.148434][ T8758] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 82.153869][ T8758] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 82.160778][ T8758] ? do_syscall_64+0x1d/0x1c0 [ 82.165441][ T8758] __x64_sys_writev+0x7d/0x90 [ 82.170107][ T8758] do_syscall_64+0xf7/0x1c0 [ 82.174620][ T8758] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.180501][ T8758] RIP: 0033:0x4458f0 [ 82.184374][ T8758] Code: 05 48 3d 01 f0 ff ff 0f 83 1d d3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 41 57 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 d2 fb ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 82.204249][ T8758] RSP: 002b:00007fff928c35e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 82.212798][ T8758] RAX: ffffffffffffffda RBX: 00007fff928c3600 RCX: 00000000004458f0 [ 82.220750][ T8758] RDX: 0000000000000001 RSI: 00007fff928c3630 RDI: 00000000000000f0 [ 82.228708][ T8758] RBP: 00007fff928c35f0 R08: 0000000000000000 R09: 00000000bb1414ac [ 82.236791][ T8758] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000003 [ 82.244767][ T8758] R13: 00007fff928c35f8 R14: 0000000000000000 R15: 0000000000000000 [ 82.252788][ T8758] Modules linked in: [ 82.257002][ T8758] CR2: ffff887f9dabafff [ 82.261234][ T8758] ---[ end trace ee44d7765857c4aa ]--- [ 82.266746][ T8758] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 82.273403][ T8758] Code: 74 08 48 89 df e8 d4 3f 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 14 3f 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 82.292994][ T8758] RSP: 0018:ffffc90002047958 EFLAGS: 00010246 [ 82.299046][ T8758] RAX: 1ffff10ff3b575ff RBX: ffff887f9dabafff RCX: 0000000000000100 [ 82.307001][ T8758] RDX: ffff8880a9e727f0 RSI: 0000000000000000 RDI: ffffc90002047a88 [ 82.315042][ T8758] RBP: ffffc90002047a78 R08: ffffffff86527ef6 R09: ffffed1013b5565d [ 82.323027][ T8758] R10: ffffed1013b5565d R11: 0000000000000000 R12: ffff8880a9e72848 [ 82.330988][ T8758] R13: ffff8880a9e72780 R14: ffff88809daab000 R15: dffffc0000000000 [ 82.338947][ T8758] FS: 00000000017e8880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 82.349248][ T8758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.356508][ T8758] CR2: ffff887f9dabafff CR3: 0000000094791000 CR4: 00000000001406f0 [ 82.364654][ T8758] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.372632][ T8758] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.380678][ T8758] Kernel panic - not syncing: Fatal exception in interrupt [ 82.389389][ T8758] Kernel Offset: disabled [ 82.394291][ T8758] Rebooting in 86400 seconds..