[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 98.378535][ T28] audit: type=1800 audit(1581751921.141:25): pid=9675 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 98.407647][ T28] audit: type=1800 audit(1581751921.141:26): pid=9675 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 98.438440][ T28] audit: type=1800 audit(1581751921.141:27): pid=9675 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 '10.128.0.177' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 106.889331][ T9830] IPVS: ftp: loaded support on port[0] = 21 [ 106.937618][ T9830] BUG: unable to handle page fault for address: ffff887fa52a67ff [ 106.945480][ T9830] #PF: supervisor read access in kernel mode [ 106.951476][ T9830] #PF: error_code(0x0000) - not-present page [ 106.957435][ T9830] PGD 0 P4D 0 [ 106.960890][ T9830] Oops: 0000 [#1] PREEMPT SMP KASAN [ 106.966194][ T9830] CPU: 0 PID: 9830 Comm: syz-executor891 Not tainted 5.6.0-rc1-syzkaller #0 [ 106.974862][ T9830] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.984923][ T9830] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 106.991119][ T9830] 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 [ 107.010892][ T9830] RSP: 0018:ffffc90001f77770 EFLAGS: 00010246 [ 107.017099][ T9830] RAX: dffffc0000000000 RBX: ffff887fa52a67ff RCX: 00000000ffff0101 [ 107.025087][ T9830] RDX: 1ffff10ff4a54cff RSI: ffffffff863975b0 RDI: 0000000000000005 [ 107.033050][ T9830] RBP: ffffc90001f778b0 R08: ffff888094170240 R09: ffffed1014a52d5d [ 107.041145][ T9830] R10: ffffed1014a52d5c R11: ffff8880a5296ae3 R12: ffff8880a68f9c80 [ 107.049193][ T9830] R13: 0000000000000000 R14: 0000000000000100 R15: ffff8880a5296900 [ 107.057161][ T9830] FS: 0000000001f9b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 107.066087][ T9830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.072702][ T9830] CR2: ffff887fa52a67ff CR3: 000000009d4ca000 CR4: 00000000001406f0 [ 107.080670][ T9830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.088633][ T9830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.096595][ T9830] Call Trace: [ 107.099883][ T9830] ? generic_xdp_tx+0x740/0x740 [ 107.104759][ T9830] ? rcu_read_lock_held+0x9c/0xb0 [ 107.109783][ T9830] do_xdp_generic+0x30/0x50 [ 107.114303][ T9830] tun_get_user+0x2bcd/0x4020 [ 107.118997][ T9830] ? __kasan_check_read+0x11/0x20 [ 107.124066][ T9830] ? aa_file_perm+0x617/0x1600 [ 107.128922][ T9830] ? tun_build_skb.isra.0+0x1480/0x1480 [ 107.137441][ T9830] ? rcu_read_lock_held+0x9c/0xb0 [ 107.142495][ T9830] ? __kasan_check_read+0x11/0x20 [ 107.147517][ T9830] tun_chr_write_iter+0xbd/0x156 [ 107.152453][ T9830] do_iter_readv_writev+0x5f8/0x8f0 [ 107.157648][ T9830] ? no_seek_end_llseek_size+0x70/0x70 [ 107.163253][ T9830] ? apparmor_file_permission+0x27/0x30 [ 107.168812][ T9830] ? rw_verify_area+0x126/0x360 [ 107.173663][ T9830] do_iter_write+0x184/0x610 [ 107.178431][ T9830] ? dup_iter+0x260/0x260 [ 107.182752][ T9830] ? sendmsg_copy_msghdr+0x70/0x70 [ 107.187998][ T9830] vfs_writev+0x1b3/0x2f0 [ 107.192452][ T9830] ? vfs_iter_write+0xb0/0xb0 [ 107.197124][ T9830] ? __do_sys_bpf+0x938/0x41e0 [ 107.201888][ T9830] ? __fget_light+0x1ad/0x270 [ 107.206563][ T9830] ? __fdget+0x1b/0x20 [ 107.210776][ T9830] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 107.217719][ T9830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 107.224505][ T9830] ? __fget_light+0x1ad/0x270 [ 107.229395][ T9830] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 107.235657][ T9830] do_writev+0x15b/0x330 [ 107.239947][ T9830] ? vfs_writev+0x2f0/0x2f0 [ 107.244435][ T9830] ? do_syscall_64+0x26/0x790 [ 107.249122][ T9830] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 107.255220][ T9830] ? do_syscall_64+0x26/0x790 [ 107.259984][ T9830] __x64_sys_writev+0x75/0xb0 [ 107.264652][ T9830] do_syscall_64+0xfa/0x790 [ 107.269300][ T9830] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 107.275406][ T9830] RIP: 0033:0x4418c0 [ 107.279343][ T9830] 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 51 97 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 [ 107.299200][ T9830] RSP: 002b:00007fff2e496a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 107.307831][ T9830] RAX: ffffffffffffffda RBX: 00007fff2e496a30 RCX: 00000000004418c0 [ 107.315925][ T9830] RDX: 0000000000000001 RSI: 00007fff2e496a60 RDI: 00000000000000f0 [ 107.324020][ T9830] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 107.332313][ T9830] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 [ 107.340296][ T9830] R13: 0000000000402cb0 R14: 0000000000000000 R15: 0000000000000000 [ 107.348360][ T9830] Modules linked in: [ 107.352251][ T9830] CR2: ffff887fa52a67ff [ 107.356501][ T9830] ---[ end trace bc8e63695765309b ]--- [ 107.362027][ T9830] RIP: 0010:do_xdp_generic.part.0+0x499/0x18e0 [ 107.368194][ T9830] 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 [ 107.388042][ T9830] RSP: 0018:ffffc90001f77770 EFLAGS: 00010246 [ 107.394268][ T9830] RAX: dffffc0000000000 RBX: ffff887fa52a67ff RCX: 00000000ffff0101 [ 107.402337][ T9830] RDX: 1ffff10ff4a54cff RSI: ffffffff863975b0 RDI: 0000000000000005 [ 107.410310][ T9830] RBP: ffffc90001f778b0 R08: ffff888094170240 R09: ffffed1014a52d5d [ 107.418400][ T9830] R10: ffffed1014a52d5c R11: ffff8880a5296ae3 R12: ffff8880a68f9c80 [ 107.426486][ T9830] R13: 0000000000000000 R14: 0000000000000100 R15: ffff8880a5296900 [ 107.435408][ T9830] FS: 0000000001f9b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 107.444411][ T9830] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.450998][ T9830] CR2: ffff887fa52a67ff CR3: 000000009d4ca000 CR4: 00000000001406f0 [ 107.459309][ T9830] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.467424][ T9830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.475392][ T9830] Kernel panic - not syncing: Fatal exception in interrupt [ 107.484065][ T9830] Kernel Offset: disabled [ 107.488398][ T9830] Rebooting in 86400 seconds..