[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 96.732569][ T27] audit: type=1800 audit(1581635103.865:25): pid=9660 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 96.766298][ T27] audit: type=1800 audit(1581635103.865:26): pid=9660 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 96.806294][ T27] audit: type=1800 audit(1581635103.865:27): pid=9660 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 '10.128.1.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 105.186944][ T9813] IPVS: ftp: loaded support on port[0] = 21 [ 105.235095][ T9813] BUG: unable to handle page fault for address: ffff887f91956fff [ 105.242845][ T9813] #PF: supervisor read access in kernel mode [ 105.249186][ T9813] #PF: error_code(0x0000) - not-present page [ 105.255152][ T9813] PGD 0 P4D 0 [ 105.258516][ T9813] Oops: 0000 [#1] PREEMPT SMP KASAN [ 105.263699][ T9813] CPU: 0 PID: 9813 Comm: syz-executor267 Not tainted 5.5.0-syzkaller #0 [ 105.272116][ T9813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.282232][ T9813] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 105.288518][ T9813] 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 ac 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 [ 105.308338][ T9813] RSP: 0018:ffffc900018d7770 EFLAGS: 00010246 [ 105.314383][ T9813] RAX: dffffc0000000000 RBX: ffff888091947000 RCX: ffffffff0000feff [ 105.322456][ T9813] RDX: 1ffff10ff232adff RSI: ffff8880a93a43b0 RDI: 0000000000000005 [ 105.330839][ T9813] RBP: ffffc900018d78b0 R08: ffff88808d1e0100 R09: ffffed1012328e5d [ 105.338997][ T9813] R10: ffffed1012328e5c R11: ffff8880919472e3 R12: ffff887f91956fff [ 105.346979][ T9813] R13: 0000000000000100 R14: ffff888091956fff R15: ffff8880a93a4340 [ 105.355037][ T9813] FS: 0000000000770880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 105.363956][ T9813] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.371079][ T9813] CR2: ffff887f91956fff CR3: 00000000a123c000 CR4: 00000000001406f0 [ 105.379286][ T9813] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 105.387259][ T9813] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 105.395227][ T9813] Call Trace: [ 105.398571][ T9813] ? generic_xdp_tx+0x740/0x740 [ 105.403503][ T9813] ? rcu_read_lock_held+0x9c/0xb0 [ 105.408529][ T9813] do_xdp_generic+0x30/0x50 [ 105.413080][ T9813] tun_get_user+0x2bcd/0x4020 [ 105.418239][ T9813] ? __kasan_check_read+0x11/0x20 [ 105.423352][ T9813] ? aa_file_perm+0x617/0x1600 [ 105.428111][ T9813] ? tun_build_skb.isra.0+0x1480/0x1480 [ 105.433660][ T9813] ? rcu_read_lock_held+0x9c/0xb0 [ 105.438984][ T9813] ? __kasan_check_read+0x11/0x20 [ 105.443997][ T9813] tun_chr_write_iter+0xbd/0x156 [ 105.448986][ T9813] do_iter_readv_writev+0x5f8/0x8f0 [ 105.454170][ T9813] ? no_seek_end_llseek_size+0x70/0x70 [ 105.460071][ T9813] ? apparmor_file_permission+0x27/0x30 [ 105.465621][ T9813] ? rw_verify_area+0x126/0x360 [ 105.470579][ T9813] do_iter_write+0x184/0x610 [ 105.475254][ T9813] ? dup_iter+0x260/0x260 [ 105.479565][ T9813] ? sendmsg_copy_msghdr+0x70/0x70 [ 105.484675][ T9813] vfs_writev+0x1b3/0x2f0 [ 105.489283][ T9813] ? vfs_iter_write+0xb0/0xb0 [ 105.493942][ T9813] ? __do_sys_bpf+0x938/0x41e0 [ 105.498703][ T9813] ? __fget_light+0x1ad/0x270 [ 105.503369][ T9813] ? __fdget+0x1b/0x20 [ 105.507422][ T9813] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.513716][ T9813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.520094][ T9813] ? __fget_light+0x1ad/0x270 [ 105.524906][ T9813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 105.531141][ T9813] do_writev+0x15b/0x330 [ 105.535367][ T9813] ? vfs_writev+0x2f0/0x2f0 [ 105.539898][ T9813] ? do_syscall_64+0x26/0x790 [ 105.544664][ T9813] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.550857][ T9813] ? do_syscall_64+0x26/0x790 [ 105.555625][ T9813] __x64_sys_writev+0x75/0xb0 [ 105.560733][ T9813] do_syscall_64+0xfa/0x790 [ 105.565264][ T9813] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.571171][ T9813] RIP: 0033:0x4418c0 [ 105.575057][ T9813] 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 [ 105.594823][ T9813] RSP: 002b:00007fff75916ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 105.603251][ T9813] RAX: ffffffffffffffda RBX: 00007fff75916ef0 RCX: 00000000004418c0 [ 105.611320][ T9813] RDX: 0000000000000001 RSI: 00007fff75916f20 RDI: 00000000000000f0 [ 105.619336][ T9813] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 105.627356][ T9813] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 [ 105.635372][ T9813] R13: 0000000000402cb0 R14: 0000000000000000 R15: 0000000000000000 [ 105.643670][ T9813] Modules linked in: [ 105.647565][ T9813] CR2: ffff887f91956fff [ 105.651998][ T9813] ---[ end trace ae23fa524c248d35 ]--- [ 105.657468][ T9813] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 105.663630][ T9813] 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 ac 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 [ 105.683292][ T9813] RSP: 0018:ffffc900018d7770 EFLAGS: 00010246 [ 105.689343][ T9813] RAX: dffffc0000000000 RBX: ffff888091947000 RCX: ffffffff0000feff [ 105.697304][ T9813] RDX: 1ffff10ff232adff RSI: ffff8880a93a43b0 RDI: 0000000000000005 [ 105.706035][ T9813] RBP: ffffc900018d78b0 R08: ffff88808d1e0100 R09: ffffed1012328e5d [ 105.714148][ T9813] R10: ffffed1012328e5c R11: ffff8880919472e3 R12: ffff887f91956fff [ 105.722302][ T9813] R13: 0000000000000100 R14: ffff888091956fff R15: ffff8880a93a4340 [ 105.730261][ T9813] FS: 0000000000770880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 105.740591][ T9813] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.747287][ T9813] CR2: ffff887f91956fff CR3: 00000000a123c000 CR4: 00000000001406f0 [ 105.755413][ T9813] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 105.763486][ T9813] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 105.771459][ T9813] Kernel panic - not syncing: Fatal exception in interrupt [ 105.780127][ T9813] Kernel Offset: disabled [ 105.784563][ T9813] Rebooting in 86400 seconds..