[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 92.388664][ T27] audit: type=1800 audit(1581737112.195:25): pid=9507 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 92.417761][ T27] audit: type=1800 audit(1581737112.195:26): pid=9507 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 92.485291][ T27] audit: type=1800 audit(1581737112.195:27): pid=9507 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 '10.128.10.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 103.333274][ T9661] IPVS: ftp: loaded support on port[0] = 21 [ 103.379343][ T9661] BUG: unable to handle page fault for address: ffff887f94b0cfff [ 103.387300][ T9661] #PF: supervisor read access in kernel mode [ 103.393621][ T9661] #PF: error_code(0x0000) - not-present page [ 103.399583][ T9661] PGD 0 P4D 0 [ 103.402943][ T9661] Oops: 0000 [#1] PREEMPT SMP KASAN [ 103.408178][ T9661] CPU: 0 PID: 9661 Comm: syz-executor758 Not tainted 5.6.0-rc1-next-20200214-syzkaller #0 [ 103.418654][ T9661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.428902][ T9661] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 103.435042][ T9661] Code: ff 48 c1 ea 03 48 89 85 e8 fe ff ff 4c 89 f8 4c 29 f0 48 89 45 80 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 11 00 00 <48> 8b 03 48 8d 7b 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 d8 fe [ 103.454683][ T9661] RSP: 0018:ffffc90001e17770 EFLAGS: 00010246 [ 103.460736][ T9661] RAX: dffffc0000000000 RBX: ffff887f94b0cfff RCX: 00000000ffff0101 [ 103.468737][ T9661] RDX: 1ffff10ff29619ff RSI: ffffffff863b2840 RDI: 0000000000000005 [ 103.476701][ T9661] RBP: ffffc90001e178b0 R08: ffff88808ee88400 R09: ffffed101295fa5d [ 103.484666][ T9661] R10: ffffed101295fa5c R11: ffff888094afd2e3 R12: ffff888099dab500 [ 103.492917][ T9661] R13: 0000000000000000 R14: 0000000000000100 R15: ffff888094afd100 [ 103.501236][ T9661] FS: 0000000000e0a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 103.510240][ T9661] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.519117][ T9661] CR2: ffff887f94b0cfff CR3: 00000000a971c000 CR4: 00000000001406f0 [ 103.527144][ T9661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.535201][ T9661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.543202][ T9661] Call Trace: [ 103.546550][ T9661] ? generic_xdp_tx+0x740/0x740 [ 103.551416][ T9661] ? rcu_read_lock_held+0x9c/0xb0 [ 103.556460][ T9661] do_xdp_generic+0x30/0x50 [ 103.560953][ T9661] tun_get_user+0x2bcd/0x4020 [ 103.566250][ T9661] ? aa_file_perm+0x62b/0x1600 [ 103.571309][ T9661] ? tun_build_skb.isra.0+0x1480/0x1480 [ 103.576857][ T9661] ? rcu_read_lock_held+0x9c/0xb0 [ 103.581867][ T9661] ? __kasan_check_read+0x11/0x20 [ 103.586888][ T9661] tun_chr_write_iter+0xbd/0x156 [ 103.591945][ T9661] do_iter_readv_writev+0x5f8/0x8f0 [ 103.597143][ T9661] ? no_seek_end_llseek_size+0x70/0x70 [ 103.602665][ T9661] ? apparmor_file_permission+0x27/0x30 [ 103.609090][ T9661] ? rw_verify_area+0x126/0x360 [ 103.614330][ T9661] do_iter_write+0x184/0x610 [ 103.618996][ T9661] ? dup_iter+0x260/0x260 [ 103.623306][ T9661] ? sendmsg_copy_msghdr+0x70/0x70 [ 103.628437][ T9661] vfs_writev+0x1b3/0x2f0 [ 103.632846][ T9661] ? vfs_iter_write+0xb0/0xb0 [ 103.637872][ T9661] ? __do_sys_bpf+0x938/0x4130 [ 103.642641][ T9661] ? __fget_light+0x1ad/0x270 [ 103.647416][ T9661] ? __fdget+0x1b/0x20 [ 103.652374][ T9661] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.658702][ T9661] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.665162][ T9661] ? __fget_light+0x1ad/0x270 [ 103.669826][ T9661] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.676303][ T9661] do_writev+0x15b/0x330 [ 103.681162][ T9661] ? vfs_writev+0x2f0/0x2f0 [ 103.685665][ T9661] ? do_syscall_64+0x26/0x790 [ 103.690340][ T9661] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.696405][ T9661] ? do_syscall_64+0x26/0x790 [ 103.701180][ T9661] __x64_sys_writev+0x75/0xb0 [ 103.706039][ T9661] do_syscall_64+0xfa/0x790 [ 103.710532][ T9661] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.716766][ T9661] RIP: 0033:0x441920 [ 103.720745][ T9661] Code: 05 48 3d 01 f0 ff ff 0f 83 fd 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d f1 96 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0e fc ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 103.740611][ T9661] RSP: 002b:00007ffe51328a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 103.749156][ T9661] RAX: ffffffffffffffda RBX: 00007ffe51328a20 RCX: 0000000000441920 [ 103.757120][ T9661] RDX: 0000000000000001 RSI: 00007ffe51328a50 RDI: 00000000000000f0 [ 103.765073][ T9661] RBP: 00007ffe51328a10 R08: 0000000000000000 R09: 00000000bb1414ac [ 103.773161][ T9661] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000003 [ 103.781119][ T9661] R13: 00007ffe51328a18 R14: 0000000000000000 R15: 0000000000000000 [ 103.789085][ T9661] Modules linked in: [ 103.792968][ T9661] CR2: ffff887f94b0cfff [ 103.797104][ T9661] ---[ end trace ffa0de3a1ff511b4 ]--- [ 103.802549][ T9661] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 103.808696][ T9661] Code: ff 48 c1 ea 03 48 89 85 e8 fe ff ff 4c 89 f8 4c 29 f0 48 89 45 80 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 9c 11 00 00 <48> 8b 03 48 8d 7b 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 d8 fe [ 103.828418][ T9661] RSP: 0018:ffffc90001e17770 EFLAGS: 00010246 [ 103.834499][ T9661] RAX: dffffc0000000000 RBX: ffff887f94b0cfff RCX: 00000000ffff0101 [ 103.842462][ T9661] RDX: 1ffff10ff29619ff RSI: ffffffff863b2840 RDI: 0000000000000005 [ 103.850470][ T9661] RBP: ffffc90001e178b0 R08: ffff88808ee88400 R09: ffffed101295fa5d [ 103.858428][ T9661] R10: ffffed101295fa5c R11: ffff888094afd2e3 R12: ffff888099dab500 [ 103.866393][ T9661] R13: 0000000000000000 R14: 0000000000000100 R15: ffff888094afd100 [ 103.874456][ T9661] FS: 0000000000e0a880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 103.884242][ T9661] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.891426][ T9661] CR2: ffff887f94b0cfff CR3: 00000000a971c000 CR4: 00000000001406f0 [ 103.899647][ T9661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.907612][ T9661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.915570][ T9661] Kernel panic - not syncing: Fatal exception in interrupt [ 103.923958][ T9661] Kernel Offset: disabled [ 103.928284][ T9661] Rebooting in 86400 seconds..