[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.814523][ T28] audit: type=1800 audit(1579425549.448:25): pid=9632 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.834534][ T28] audit: type=1800 audit(1579425549.448:26): pid=9632 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.870851][ T28] audit: type=1800 audit(1579425549.458:27): pid=9632 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 '10.128.0.53' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.898303][ T9785] IPVS: ftp: loaded support on port[0] = 21 [ 81.943692][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.952336][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.961073][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.969271][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.977491][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.985672][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 81.993906][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 82.002471][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 82.010679][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 82.018844][ T9785] netlink: 'syz-executor949': attribute type 1 has an invalid length. [ 82.027563][ T9785] BUG: unable to handle page fault for address: ffff887f9391bfff [ 82.035328][ T9785] #PF: supervisor read access in kernel mode [ 82.041303][ T9785] #PF: error_code(0x0000) - not-present page [ 82.047263][ T9785] PGD 0 P4D 0 [ 82.050628][ T9785] Oops: 0000 [#1] PREEMPT SMP KASAN [ 82.055803][ T9785] CPU: 0 PID: 9785 Comm: syz-executor949 Not tainted 5.5.0-rc5-syzkaller #0 [ 82.064447][ T9785] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.074499][ T9785] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 82.080627][ T9785] 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 [ 82.100207][ T9785] RSP: 0018:ffffc90001ff7770 EFLAGS: 00010246 [ 82.106255][ T9785] RAX: dffffc0000000000 RBX: ffff88809390c000 RCX: ffffffff0000feff [ 82.114205][ T9785] RDX: 1ffff10ff27237ff RSI: ffff8880a47401f0 RDI: 0000000000000005 [ 82.122151][ T9785] RBP: ffffc90001ff78b0 R08: ffff8880a7438300 R09: ffffed101272185d [ 82.130096][ T9785] R10: ffffed101272185c R11: ffff88809390c2e3 R12: ffff887f9391bfff [ 82.138044][ T9785] R13: 0000000000000100 R14: ffff88809391bfff R15: ffff8880a4740180 [ 82.146002][ T9785] FS: 0000000001a5f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 82.154913][ T9785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.161474][ T9785] CR2: ffff887f9391bfff CR3: 00000000a93a6000 CR4: 00000000001406f0 [ 82.169432][ T9785] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.177397][ T9785] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.185388][ T9785] Call Trace: [ 82.188675][ T9785] ? generic_xdp_tx+0x740/0x740 [ 82.193570][ T9785] ? rcu_read_lock_held+0x9c/0xb0 [ 82.198584][ T9785] do_xdp_generic+0x30/0x50 [ 82.203153][ T9785] tun_get_user+0x2bcd/0x3fc0 [ 82.207824][ T9785] ? __kasan_check_read+0x11/0x20 [ 82.212936][ T9785] ? aa_file_perm+0x617/0x1600 [ 82.217687][ T9785] ? tun_build_skb.isra.0+0x1480/0x1480 [ 82.223220][ T9785] ? rcu_read_lock_held+0x9c/0xb0 [ 82.228220][ T9785] ? __kasan_check_read+0x11/0x20 [ 82.233223][ T9785] tun_chr_write_iter+0xbd/0x156 [ 82.238162][ T9785] do_iter_readv_writev+0x5f8/0x8f0 [ 82.243663][ T9785] ? no_seek_end_llseek_size+0x70/0x70 [ 82.249097][ T9785] ? apparmor_file_permission+0x27/0x30 [ 82.254623][ T9785] ? rw_verify_area+0x126/0x360 [ 82.259447][ T9785] do_iter_write+0x184/0x610 [ 82.264011][ T9785] ? dup_iter+0x260/0x260 [ 82.268315][ T9785] ? sendmsg_copy_msghdr+0x70/0x70 [ 82.273405][ T9785] vfs_writev+0x1b3/0x2f0 [ 82.277711][ T9785] ? vfs_iter_write+0xb0/0xb0 [ 82.282367][ T9785] ? bpf_prog_new_fd+0x51/0x60 [ 82.287107][ T9785] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.293756][ T9785] ? __do_sys_bpf+0x751/0x3610 [ 82.298495][ T9785] ? __fget_light+0x1a9/0x230 [ 82.303150][ T9785] ? __fdget+0x1b/0x20 [ 82.307194][ T9785] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.313411][ T9785] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.319641][ T9785] ? __fget_light+0x1a9/0x230 [ 82.324387][ T9785] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.330650][ T9785] do_writev+0x15b/0x330 [ 82.334876][ T9785] ? vfs_writev+0x2f0/0x2f0 [ 82.339362][ T9785] ? do_syscall_64+0x26/0x790 [ 82.344032][ T9785] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.350080][ T9785] ? do_syscall_64+0x26/0x790 [ 82.354740][ T9785] __x64_sys_writev+0x75/0xb0 [ 82.359406][ T9785] do_syscall_64+0xfa/0x790 [ 82.363899][ T9785] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.369765][ T9785] RIP: 0033:0x441a80 [ 82.373648][ T9785] 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 b1 95 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 [ 82.393243][ T9785] RSP: 002b:00007ffc46005ba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 82.402044][ T9785] RAX: ffffffffffffffda RBX: 00007ffc46005bc0 RCX: 0000000000441a80 [ 82.410001][ T9785] RDX: 0000000000000001 RSI: 00007ffc46005bf0 RDI: 00000000000000f0 [ 82.418389][ T9785] RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 82.426379][ T9785] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 [ 82.434342][ T9785] R13: 0000000000402e70 R14: 0000000000000000 R15: 0000000000000000 [ 82.442306][ T9785] Modules linked in: [ 82.446182][ T9785] CR2: ffff887f9391bfff [ 82.450320][ T9785] ---[ end trace 66fff70f689b6c09 ]--- [ 82.456139][ T9785] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 [ 82.462383][ T9785] 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 [ 82.482176][ T9785] RSP: 0018:ffffc90001ff7770 EFLAGS: 00010246 [ 82.488222][ T9785] RAX: dffffc0000000000 RBX: ffff88809390c000 RCX: ffffffff0000feff [ 82.496185][ T9785] RDX: 1ffff10ff27237ff RSI: ffff8880a47401f0 RDI: 0000000000000005 [ 82.504240][ T9785] RBP: ffffc90001ff78b0 R08: ffff8880a7438300 R09: ffffed101272185d [ 82.512315][ T9785] R10: ffffed101272185c R11: ffff88809390c2e3 R12: ffff887f9391bfff [ 82.520313][ T9785] R13: 0000000000000100 R14: ffff88809391bfff R15: ffff8880a4740180 [ 82.528276][ T9785] FS: 0000000001a5f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 82.537191][ T9785] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.543760][ T9785] CR2: ffff887f9391bfff CR3: 00000000a93a6000 CR4: 00000000001406f0 [ 82.551716][ T9785] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.559676][ T9785] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.567797][ T9785] Kernel panic - not syncing: Fatal exception in interrupt [ 82.576481][ T9785] Kernel Offset: disabled [ 82.580829][ T9785] Rebooting in 86400 seconds..