[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 96.084860][ T25] audit: type=1800 audit(1579679971.547:25): pid=9501 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 96.105721][ T25] audit: type=1800 audit(1579679971.547:26): pid=9501 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 96.144768][ T25] audit: type=1800 audit(1579679971.557:27): pid=9501 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.100' (ECDSA) to the list of known hosts. syzkaller login: [ 105.610303][ T9660] IPVS: ftp: loaded support on port[0] = 21 [ 105.611812][ T9665] IPVS: ftp: loaded support on port[0] = 21 [ 105.620833][ T9668] IPVS: ftp: loaded support on port[0] = 21 [ 105.629934][ T9666] IPVS: ftp: loaded support on port[0] = 21 [ 105.649888][ T9664] IPVS: ftp: loaded support on port[0] = 21 [ 105.657066][ T9667] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program [ 105.810149][ C0] hrtimer: interrupt took 34186 ns executing program [ 105.842457][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.861184][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.881654][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.891180][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.900546][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.908971][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.918674][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.927473][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. executing program executing program [ 105.936355][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. [ 105.945263][ T9669] netlink: 'syz-executor801': attribute type 1 has an invalid length. executing program [ 106.014407][ T9675] BUG: unable to handle page fault for address: ffff887fa52747ff [ 106.022163][ T9675] #PF: supervisor read access in kernel mode [ 106.028139][ T9675] #PF: error_code(0x0000) - not-present page [ 106.034132][ T9675] PGD 0 P4D 0 [ 106.037510][ T9675] Oops: 0000 [#1] PREEMPT SMP KASAN [ 106.042706][ T9675] CPU: 1 PID: 9675 Comm: syz-executor801 Not tainted 5.5.0-rc7-syzkaller #0 [ 106.051362][ T9675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.061442][ T9675] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 106.067586][ T9675] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 9e 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 106.087192][ T9675] RSP: 0018:ffffc90002147770 EFLAGS: 00010246 [ 106.093367][ T9675] RAX: dffffc0000000000 RBX: ffff8880a5264800 RCX: ffffffff0000feff [ 106.101336][ T9675] RDX: 1ffff10ff4a4e8ff RSI: ffff8880a4c21eb0 RDI: 0000000000000005 [ 106.109436][ T9675] RBP: ffffc900021478b0 R08: ffff8880977865c0 R09: ffffed1014a4c95d [ 106.117413][ T9675] R10: ffffed1014a4c95c R11: ffff8880a5264ae3 R12: ffff887fa52747ff [ 106.125399][ T9675] R13: 0000000000000100 R14: ffff8880a52747ff R15: ffff8880a4c21e40 [ 106.133395][ T9675] FS: 0000000001fd9880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 106.142326][ T9675] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.148919][ T9675] CR2: ffff887fa52747ff CR3: 000000009f56b000 CR4: 00000000001406e0 [ 106.156901][ T9675] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.164874][ T9675] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.172849][ T9675] Call Trace: [ 106.176173][ T9675] ? generic_xdp_tx+0x740/0x740 [ 106.181037][ T9675] ? rcu_read_lock_held+0x9c/0xb0 [ 106.186084][ T9675] do_xdp_generic+0x30/0x50 [ 106.190611][ T9675] tun_get_user+0x2bcd/0x3fc0 [ 106.195297][ T9675] ? __kasan_check_read+0x11/0x20 [ 106.200335][ T9675] ? aa_file_perm+0x617/0x1600 [ 106.205268][ T9675] ? tun_build_skb.isra.0+0x1470/0x1470 [ 106.210830][ T9675] ? rcu_read_lock_held+0x9c/0xb0 [ 106.215854][ T9675] ? __kasan_check_read+0x11/0x20 [ 106.220896][ T9675] tun_chr_write_iter+0xbd/0x156 [ 106.225838][ T9675] do_iter_readv_writev+0x5f8/0x8f0 [ 106.231072][ T9675] ? no_seek_end_llseek_size+0x70/0x70 [ 106.236548][ T9675] ? apparmor_file_permission+0x27/0x30 [ 106.242117][ T9675] ? rw_verify_area+0x126/0x360 [ 106.247487][ T9675] do_iter_write+0x184/0x610 [ 106.252072][ T9675] ? dup_iter+0x260/0x260 [ 106.256409][ T9675] vfs_writev+0x1b3/0x2f0 [ 106.260873][ T9675] ? vfs_iter_write+0xb0/0xb0 [ 106.265680][ T9675] ? find_held_lock+0x35/0x130 [ 106.270468][ T9675] ? __do_page_fault+0x56a/0xd80 [ 106.275444][ T9675] ? lock_downgrade+0x920/0x920 [ 106.280399][ T9675] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.286754][ T9675] ? debug_smp_processor_id+0x33/0x18a [ 106.292239][ T9675] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.298511][ T9675] ? __fget_light+0x1a9/0x230 [ 106.303203][ T9675] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.309451][ T9675] do_writev+0x15b/0x330 [ 106.313712][ T9675] ? vfs_writev+0x2f0/0x2f0 [ 106.318839][ T9675] ? do_syscall_64+0x26/0x790 [ 106.323523][ T9675] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 106.329819][ T9675] ? do_syscall_64+0x26/0x790 [ 106.334496][ T9675] __x64_sys_writev+0x75/0xb0 [ 106.339185][ T9675] do_syscall_64+0xfa/0x790 [ 106.343709][ T9675] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 106.349612][ T9675] RIP: 0033:0x446210 [ 106.353692][ T9675] Code: 05 48 3d 01 f0 ff ff 0f 83 cd cc fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 01 4e 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 a4 cc fb ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 106.373587][ T9675] RSP: 002b:00007ffdbf118458 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 106.382012][ T9675] RAX: ffffffffffffffda RBX: 00007ffdbf118470 RCX: 0000000000446210 [ 106.389988][ T9675] RDX: 0000000000000001 RSI: 00007ffdbf1184a0 RDI: 00000000000000f0 [ 106.398050][ T9675] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 106.406126][ T9675] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000019cf2 [ 106.414109][ T9675] R13: 00000000004033d0 R14: 0000000000000000 R15: 0000000000000000 [ 106.422316][ T9675] Modules linked in: [ 106.426233][ T9675] CR2: ffff887fa52747ff [ 106.430402][ T9675] ---[ end trace 1c3f5cb2961adc43 ]--- [ 106.436052][ T9675] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 106.442333][ T9675] Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 9e 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 [ 106.461948][ T9675] RSP: 0018:ffffc90002147770 EFLAGS: 00010246 [ 106.468023][ T9675] RAX: dffffc0000000000 RBX: ffff8880a5264800 RCX: ffffffff0000feff [ 106.476010][ T9675] RDX: 1ffff10ff4a4e8ff RSI: ffff8880a4c21eb0 RDI: 0000000000000005 [ 106.489888][ T9675] RBP: ffffc900021478b0 R08: ffff8880977865c0 R09: ffffed1014a4c95d [ 106.497868][ T9675] R10: ffffed1014a4c95c R11: ffff8880a5264ae3 R12: ffff887fa52747ff [ 106.505838][ T9675] R13: 0000000000000100 R14: ffff8880a52747ff R15: ffff8880a4c21e40 [ 106.513824][ T9675] FS: 0000000001fd9880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 106.522762][ T9675] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.529524][ T9675] CR2: ffff887fa52747ff CR3: 000000009f56b000 CR4: 00000000001406e0 [ 106.537508][ T9675] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.545480][ T9675] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.553570][ T9675] Kernel panic - not syncing: Fatal exception in interrupt [ 106.562858][ T9675] Kernel Offset: disabled [ 106.567202][ T9675] Rebooting in 86400 seconds..