[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 92.467087][ T27] audit: type=1800 audit(1580922609.583:25): pid=9586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 92.487281][ T27] audit: type=1800 audit(1580922609.583:26): pid=9586 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 92.514784][ T27] audit: type=1800 audit(1580922609.583:27): pid=9586 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 '10.128.0.115' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 100.611704][ T9739] IPVS: ftp: loaded support on port[0] = 21 [ 100.662347][ T9741] BUG: unable to handle page fault for address: ffff887f9c406fff [ 100.670187][ T9741] #PF: supervisor read access in kernel mode [ 100.676184][ T9741] #PF: error_code(0x0000) - not-present page [ 100.682156][ T9741] PGD 0 P4D 0 [ 100.685535][ T9741] Oops: 0000 [#1] PREEMPT SMP KASAN [ 100.690719][ T9741] CPU: 1 PID: 9741 Comm: syz-executor715 Not tainted 5.5.0-syzkaller #0 [ 100.699022][ T9741] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.709124][ T9741] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 100.715258][ T9741] 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 [ 100.734848][ T9741] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 100.740945][ T9741] RAX: dffffc0000000000 RBX: ffff88809c3f7000 RCX: ffffffff0000feff [ 100.748925][ T9741] RDX: 1ffff10ff3880dff RSI: ffff88809e8531b0 RDI: 0000000000000005 [ 100.756881][ T9741] RBP: ffffc90000e778b0 R08: ffff88809d536500 R09: ffffed101387ee5d [ 100.764846][ T9741] R10: ffffed101387ee5c R11: ffff88809c3f72e3 R12: ffff887f9c406fff [ 100.772810][ T9741] R13: 0000000000000100 R14: ffff88809c406fff R15: ffff88809e853140 [ 100.780769][ T9741] FS: 0000000001268880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 100.789684][ T9741] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 100.796254][ T9741] CR2: ffff887f9c406fff CR3: 00000000958af000 CR4: 00000000001406e0 [ 100.804224][ T9741] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 100.812224][ T9741] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 100.820192][ T9741] Call Trace: [ 100.823478][ T9741] ? generic_xdp_tx+0x740/0x740 [ 100.828332][ T9741] ? rcu_read_lock_held+0x9c/0xb0 [ 100.833365][ T9741] do_xdp_generic+0x30/0x50 [ 100.837905][ T9741] tun_get_user+0x2bcd/0x4020 [ 100.842615][ T9741] ? __kasan_check_read+0x11/0x20 [ 100.847667][ T9741] ? aa_file_perm+0x617/0x1600 [ 100.852429][ T9741] ? tun_build_skb.isra.0+0x1480/0x1480 [ 100.857963][ T9741] ? rcu_read_lock_held+0x9c/0xb0 [ 100.863096][ T9741] ? __kasan_check_read+0x11/0x20 [ 100.868110][ T9741] tun_chr_write_iter+0xbd/0x156 [ 100.873049][ T9741] do_iter_readv_writev+0x5f8/0x8f0 [ 100.878243][ T9741] ? no_seek_end_llseek_size+0x70/0x70 [ 100.883701][ T9741] ? apparmor_file_permission+0x27/0x30 [ 100.889234][ T9741] ? rw_verify_area+0x126/0x360 [ 100.894063][ T9741] do_iter_write+0x184/0x610 [ 100.898636][ T9741] ? dup_iter+0x260/0x260 [ 100.902943][ T9741] ? mark_lock+0xc2/0x1220 [ 100.907359][ T9741] vfs_writev+0x1b3/0x2f0 [ 100.911671][ T9741] ? vfs_iter_write+0xb0/0xb0 [ 100.916338][ T9741] ? lock_downgrade+0x920/0x920 [ 100.921194][ T9741] ? handle_mm_fault+0x292/0xa50 [ 100.926128][ T9741] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.932358][ T9741] ? __fget_light+0x1ad/0x270 [ 100.937031][ T9741] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.943258][ T9741] do_writev+0x15b/0x330 [ 100.947488][ T9741] ? vfs_writev+0x2f0/0x2f0 [ 100.951974][ T9741] ? do_syscall_64+0x26/0x790 [ 100.956630][ T9741] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.962673][ T9741] ? do_syscall_64+0x26/0x790 [ 100.967349][ T9741] __x64_sys_writev+0x75/0xb0 [ 100.972005][ T9741] do_syscall_64+0xfa/0x790 [ 100.976493][ T9741] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.982371][ T9741] RIP: 0033:0x4420c0 [ 100.986244][ T9741] Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 51 8f 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 [ 101.005825][ T9741] RSP: 002b:00007ffdf99fb828 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 101.014213][ T9741] RAX: ffffffffffffffda RBX: 00007ffdf99fb840 RCX: 00000000004420c0 [ 101.022164][ T9741] RDX: 0000000000000001 RSI: 00007ffdf99fb870 RDI: 00000000000000f0 [ 101.030272][ T9741] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 [ 101.038233][ T9741] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000001890f [ 101.046196][ T9741] R13: 0000000000402f10 R14: 0000000000000000 R15: 0000000000000000 [ 101.054187][ T9741] Modules linked in: [ 101.058063][ T9741] CR2: ffff887f9c406fff [ 101.062233][ T9741] ---[ end trace ee388e3496e73ba5 ]--- [ 101.067709][ T9741] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 101.073868][ T9741] 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 [ 101.093502][ T9741] RSP: 0018:ffffc90000e77770 EFLAGS: 00010246 [ 101.099589][ T9741] RAX: dffffc0000000000 RBX: ffff88809c3f7000 RCX: ffffffff0000feff [ 101.107545][ T9741] RDX: 1ffff10ff3880dff RSI: ffff88809e8531b0 RDI: 0000000000000005 [ 101.115510][ T9741] RBP: ffffc90000e778b0 R08: ffff88809d536500 R09: ffffed101387ee5d [ 101.123468][ T9741] R10: ffffed101387ee5c R11: ffff88809c3f72e3 R12: ffff887f9c406fff [ 101.131416][ T9741] R13: 0000000000000100 R14: ffff88809c406fff R15: ffff88809e853140 [ 101.139406][ T9741] FS: 0000000001268880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 101.148361][ T9741] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.154924][ T9741] CR2: ffff887f9c406fff CR3: 00000000958af000 CR4: 00000000001406e0 [ 101.162876][ T9741] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.170823][ T9741] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 101.178772][ T9741] Kernel panic - not syncing: Fatal exception in interrupt [ 101.187302][ T9741] Kernel Offset: disabled [ 101.191625][ T9741] Rebooting in 86400 seconds..