[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.514082][ T27] audit: type=1800 audit(1579559896.817:25): pid=8531 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.545798][ T27] audit: type=1800 audit(1579559896.827:26): pid=8531 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.571080][ T27] audit: type=1800 audit(1579559896.827:27): pid=8531 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.157' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.451187][ T8684] IPVS: ftp: loaded support on port[0] = 21 [ 72.493545][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.502021][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.510235][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.518442][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.527364][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. executing program [ 72.536337][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.544505][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.552752][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.561110][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.569911][ T8685] netlink: 'syz-executor264': attribute type 1 has an invalid length. [ 72.619956][ T8686] BUG: unable to handle page fault for address: ffff887f90fd5fff [ 72.627684][ T8686] #PF: supervisor read access in kernel mode [ 72.633640][ T8686] #PF: error_code(0x0000) - not-present page [ 72.639603][ T8686] PGD 0 P4D 0 [ 72.642969][ T8686] Oops: 0000 [#1] PREEMPT SMP KASAN [ 72.648149][ T8686] CPU: 0 PID: 8686 Comm: syz-executor264 Not tainted 5.5.0-rc7-syzkaller #0 [ 72.656798][ T8686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.666847][ T8686] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 72.673332][ T8686] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 72.692923][ T8686] RSP: 0018:ffffc90006e07958 EFLAGS: 00010246 [ 72.698975][ T8686] RAX: 1ffff10ff21fabff RBX: ffff887f90fd5fff RCX: 0000000000000100 [ 72.706930][ T8686] RDX: ffff88809fe50830 RSI: 0000000000000000 RDI: ffffc90006e07a88 [ 72.714939][ T8686] RBP: ffffc90006e07a78 R08: ffffffff86527ef6 R09: ffffed10121f8c5d [ 72.722945][ T8686] R10: ffffed10121f8c5d R11: 0000000000000000 R12: ffff88809fe50888 [ 72.730982][ T8686] R13: ffff88809fe507c0 R14: ffff888090fc6000 R15: dffffc0000000000 [ 72.738932][ T8686] FS: 00000000018a4880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 72.747835][ T8686] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.754395][ T8686] CR2: ffff887f90fd5fff CR3: 00000000a74af000 CR4: 00000000001406f0 [ 72.762343][ T8686] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.770333][ T8686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.778310][ T8686] Call Trace: [ 72.781599][ T8686] do_xdp_generic+0x39/0x110 [ 72.786341][ T8686] tun_get_user+0x1dfb/0x37b0 [ 72.791007][ T8686] ? rcu_lock_release+0x21/0x30 [ 72.795837][ T8686] tun_chr_write_iter+0xac/0x130 [ 72.800754][ T8686] do_iter_readv_writev+0x651/0x8e0 [ 72.805933][ T8686] do_iter_write+0x180/0x590 [ 72.810506][ T8686] ? import_iovec+0x122/0x2a0 [ 72.815159][ T8686] do_writev+0x239/0x490 [ 72.819381][ T8686] ? do_user_addr_fault+0x654/0xaf0 [ 72.825161][ T8686] ? check_preemption_disabled+0xb4/0x260 [ 72.830850][ T8686] ? debug_smp_processor_id+0x9/0x20 [ 72.836109][ T8686] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.841539][ T8686] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 72.847233][ T8686] ? do_syscall_64+0x1d/0x1c0 [ 72.851892][ T8686] __x64_sys_writev+0x7d/0x90 [ 72.856541][ T8686] do_syscall_64+0xf7/0x1c0 [ 72.861065][ T8686] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.867003][ T8686] RIP: 0033:0x441f50 [ 72.870872][ T8686] 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 c1 90 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 [ 72.890884][ T8686] RSP: 002b:00007ffc41493158 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 72.899277][ T8686] RAX: ffffffffffffffda RBX: 00007ffc41493170 RCX: 0000000000441f50 [ 72.907226][ T8686] RDX: 0000000000000001 RSI: 00007ffc414931a0 RDI: 00000000000000f0 [ 72.915179][ T8686] RBP: 0000000000000000 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 72.923128][ T8686] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000011af3 [ 72.931086][ T8686] R13: 0000000000402da0 R14: 0000000000000000 R15: 0000000000000000 [ 72.939035][ T8686] Modules linked in: [ 72.942922][ T8686] CR2: ffff887f90fd5fff [ 72.947055][ T8686] ---[ end trace 6580a45a2caf19fd ]--- [ 72.952494][ T8686] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 72.959012][ T8686] Code: 74 08 48 89 df e8 04 41 60 fb 4c 89 33 48 8b 9d 60 ff ff ff 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 44 40 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 72.978635][ T8686] RSP: 0018:ffffc90006e07958 EFLAGS: 00010246 [ 72.984675][ T8686] RAX: 1ffff10ff21fabff RBX: ffff887f90fd5fff RCX: 0000000000000100 [ 72.992621][ T8686] RDX: ffff88809fe50830 RSI: 0000000000000000 RDI: ffffc90006e07a88 [ 73.000566][ T8686] RBP: ffffc90006e07a78 R08: ffffffff86527ef6 R09: ffffed10121f8c5d [ 73.008514][ T8686] R10: ffffed10121f8c5d R11: 0000000000000000 R12: ffff88809fe50888 [ 73.016463][ T8686] R13: ffff88809fe507c0 R14: ffff888090fc6000 R15: dffffc0000000000 [ 73.024409][ T8686] FS: 00000000018a4880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 73.033316][ T8686] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.039901][ T8686] CR2: ffff887f90fd5fff CR3: 00000000a74af000 CR4: 00000000001406f0 [ 73.047852][ T8686] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.055813][ T8686] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.063791][ T8686] Kernel panic - not syncing: Fatal exception in interrupt [ 73.072354][ T8686] Kernel Offset: disabled [ 73.076677][ T8686] Rebooting in 86400 seconds..