[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.107738][ T27] audit: type=1800 audit(1579484240.698:25): pid=8791 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.126838][ T27] audit: type=1800 audit(1579484240.698:26): pid=8791 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.177189][ T27] audit: type=1800 audit(1579484240.698:27): pid=8791 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 '10.128.0.188' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.308141][ T8946] IPVS: ftp: loaded support on port[0] = 21 [ 61.358601][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.367350][ T8948] A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. [ 61.457411][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.465802][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.473953][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.482578][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.491234][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.499458][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.508318][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.516619][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. [ 61.525083][ T8948] netlink: 'syz-executor259': attribute type 1 has an invalid length. executing program [ 61.621079][ T8951] BUG: unable to handle page fault for address: ffff887fa48e2fff [ 61.628828][ T8951] #PF: supervisor read access in kernel mode [ 61.634808][ T8951] #PF: error_code(0x0000) - not-present page [ 61.640759][ T8951] PGD 0 P4D 0 [ 61.644120][ T8951] Oops: 0000 [#1] PREEMPT SMP KASAN [ 61.649294][ T8951] CPU: 0 PID: 8951 Comm: syz-executor259 Not tainted 5.5.0-rc6-syzkaller #0 [ 61.657938][ T8951] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.668023][ T8951] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 61.668038][ T8951] Code: 74 08 48 89 df e8 d4 3f 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 14 3f 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 61.694127][ T8951] RSP: 0018:ffffc90002207958 EFLAGS: 00010246 [ 61.700189][ T8951] RAX: 1ffff10ff491c5ff RBX: ffff887fa48e2fff RCX: 0000000000000100 [ 61.708137][ T8951] RDX: ffff88809aaccbb0 RSI: 0000000000000000 RDI: ffffc90002207a88 [ 61.716095][ T8951] RBP: ffffc90002207a78 R08: ffffffff86527ef6 R09: ffffed101491a65d [ 61.724223][ T8951] R10: ffffed101491a65d R11: 0000000000000000 R12: ffff88809aaccc08 [ 61.732260][ T8951] R13: ffff88809aaccb40 R14: ffff8880a48d3000 R15: dffffc0000000000 [ 61.740235][ T8951] FS: 00007f6cb8943700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 61.749173][ T8951] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.755749][ T8951] CR2: ffff887fa48e2fff CR3: 0000000095f13000 CR4: 00000000001406f0 [ 61.763723][ T8951] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.771699][ T8951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.779775][ T8951] Call Trace: [ 61.783069][ T8951] do_xdp_generic+0x39/0x110 [ 61.787687][ T8951] tun_get_user+0x1dfb/0x37b0 [ 61.792375][ T8951] ? rcu_lock_release+0x21/0x30 [ 61.797485][ T8951] tun_chr_write_iter+0xac/0x130 [ 61.802433][ T8951] do_iter_readv_writev+0x651/0x8e0 [ 61.807649][ T8951] do_iter_write+0x180/0x590 [ 61.812461][ T8951] ? import_iovec+0x122/0x2a0 [ 61.817136][ T8951] do_writev+0x239/0x490 [ 61.821377][ T8951] ? do_user_addr_fault+0x654/0xaf0 [ 61.826579][ T8951] ? check_preemption_disabled+0xb4/0x260 [ 61.832297][ T8951] ? debug_smp_processor_id+0x9/0x20 [ 61.837585][ T8951] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.843040][ T8951] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 61.848946][ T8951] ? do_syscall_64+0x1d/0x1c0 [ 61.853730][ T8951] __x64_sys_writev+0x7d/0x90 [ 61.858407][ T8951] do_syscall_64+0xf7/0x1c0 [ 61.863363][ T8951] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.869266][ T8951] RIP: 0033:0x44d661 [ 61.873155][ T8951] Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 c4 cb fb ff c3 48 83 ec 08 e8 fa 2b 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2c 00 00 48 89 d0 48 83 c4 08 48 3d 01 [ 61.893039][ T8951] RSP: 002b:00007f6cb8942c50 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 [ 61.901454][ T8951] RAX: ffffffffffffffda RBX: 00000000006dfc28 RCX: 000000000044d661 [ 61.909440][ T8951] RDX: 0000000000000001 RSI: 00007f6cb8942c60 RDI: 00000000000000f0 [ 61.917413][ T8951] RBP: 00000000006dfc20 R08: 0000000000000000 R09: 0000000000000013 [ 61.925488][ T8951] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dfc2c [ 61.933941][ T8951] R13: 00007ffc3cdab8ef R14: 00007f6cb89439c0 R15: 0000000000000000 [ 61.941916][ T8951] Modules linked in: [ 61.945807][ T8951] CR2: ffff887fa48e2fff [ 61.949955][ T8951] ---[ end trace 681dd3f039aede55 ]--- [ 61.955413][ T8951] RIP: 0010:netif_receive_generic_xdp+0x56c/0x11b0 [ 61.962086][ T8951] Code: 74 08 48 89 df e8 d4 3f 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 14 3f 60 fb <48> 8b 33 83 e6 01 31 ff 48 89 b5 f0 fe ff ff e8 80 00 24 fb 48 89 [ 61.981688][ T8951] RSP: 0018:ffffc90002207958 EFLAGS: 00010246 [ 61.987756][ T8951] RAX: 1ffff10ff491c5ff RBX: ffff887fa48e2fff RCX: 0000000000000100 [ 61.995820][ T8951] RDX: ffff88809aaccbb0 RSI: 0000000000000000 RDI: ffffc90002207a88 [ 62.003785][ T8951] RBP: ffffc90002207a78 R08: ffffffff86527ef6 R09: ffffed101491a65d [ 62.011748][ T8951] R10: ffffed101491a65d R11: 0000000000000000 R12: ffff88809aaccc08 [ 62.019721][ T8951] R13: ffff88809aaccb40 R14: ffff8880a48d3000 R15: dffffc0000000000 [ 62.027687][ T8951] FS: 00007f6cb8943700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 62.036608][ T8951] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.043182][ T8951] CR2: ffff887fa48e2fff CR3: 0000000095f13000 CR4: 00000000001406f0 [ 62.051149][ T8951] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.059117][ T8951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.067079][ T8951] Kernel panic - not syncing: Fatal exception in interrupt [ 62.075603][ T8951] Kernel Offset: disabled [ 62.079941][ T8951] Rebooting in 86400 seconds..