[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.527204][ T27] audit: type=1800 audit(1579723460.041:25): pid=9631 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.546957][ T27] audit: type=1800 audit(1579723460.041:26): pid=9631 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.593416][ T27] audit: type=1800 audit(1579723460.041:27): pid=9631 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 '10.128.0.57' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.250339][ T9784] IPVS: ftp: loaded support on port[0] = 21 [ 82.296600][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.305181][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.313910][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.322162][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.330394][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.338622][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.346826][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.355040][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.363231][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.371430][ T9784] netlink: 'syz-executor191': attribute type 1 has an invalid length. [ 82.380168][ T9784] BUG: unable to handle page fault for address: ffff887f96501fff [ 82.387886][ T9784] #PF: supervisor read access in kernel mode [ 82.393849][ T9784] #PF: error_code(0x0000) - not-present page [ 82.399801][ T9784] PGD 0 P4D 0 [ 82.403151][ T9784] Oops: 0000 [#1] PREEMPT SMP KASAN [ 82.408333][ T9784] CPU: 1 PID: 9784 Comm: syz-executor191 Not tainted 5.5.0-rc7-syzkaller #0 [ 82.416984][ T9784] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.427037][ T9784] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 82.433174][ T9784] 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 9e 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 [ 82.452756][ T9784] RSP: 0018:ffffc90002087770 EFLAGS: 00010246 [ 82.458806][ T9784] RAX: dffffc0000000000 RBX: ffff8880964f2000 RCX: ffffffff0000feff [ 82.466759][ T9784] RDX: 1ffff10ff2ca03ff RSI: ffff888093c732f0 RDI: 0000000000000005 [ 82.474719][ T9784] RBP: ffffc900020878b0 R08: ffff8880a7486240 R09: ffffed1012c9e45d [ 82.482668][ T9784] R10: ffffed1012c9e45c R11: ffff8880964f22e3 R12: ffff887f96501fff [ 82.490627][ T9784] R13: 0000000000000100 R14: ffff888096501fff R15: ffff888093c73280 [ 82.498590][ T9784] FS: 0000000001734880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.507542][ T9784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.514110][ T9784] CR2: ffff887f96501fff CR3: 00000000a8645000 CR4: 00000000001406e0 [ 82.522065][ T9784] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.530015][ T9784] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.537974][ T9784] Call Trace: [ 82.541250][ T9784] ? generic_xdp_tx+0x740/0x740 [ 82.546081][ T9784] ? rcu_read_lock_held+0x9c/0xb0 [ 82.551081][ T9784] do_xdp_generic+0x30/0x50 [ 82.555573][ T9784] tun_get_user+0x2bcd/0x3fc0 [ 82.560224][ T9784] ? __kasan_check_read+0x11/0x20 [ 82.565291][ T9784] ? aa_file_perm+0x617/0x1600 [ 82.570059][ T9784] ? tun_build_skb.isra.0+0x1470/0x1470 [ 82.575594][ T9784] ? rcu_read_lock_held+0x9c/0xb0 [ 82.580614][ T9784] ? __kasan_check_read+0x11/0x20 [ 82.585688][ T9784] tun_chr_write_iter+0xbd/0x156 [ 82.590612][ T9784] do_iter_readv_writev+0x5f8/0x8f0 [ 82.595788][ T9784] ? no_seek_end_llseek_size+0x70/0x70 [ 82.601224][ T9784] ? apparmor_file_permission+0x27/0x30 [ 82.606784][ T9784] ? rw_verify_area+0x126/0x360 [ 82.611631][ T9784] do_iter_write+0x184/0x610 [ 82.616198][ T9784] ? dup_iter+0x260/0x260 [ 82.620503][ T9784] ? sendmsg_copy_msghdr+0x70/0x70 [ 82.625592][ T9784] vfs_writev+0x1b3/0x2f0 [ 82.629913][ T9784] ? vfs_iter_write+0xb0/0xb0 [ 82.636223][ T9784] ? bpf_prog_new_fd+0x51/0x60 [ 82.640968][ T9784] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.647218][ T9784] ? __do_sys_bpf+0x751/0x3810 [ 82.651961][ T9784] ? __fget_light+0x1a9/0x230 [ 82.656744][ T9784] ? __fdget+0x1b/0x20 [ 82.660798][ T9784] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.667025][ T9784] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.673265][ T9784] ? __fget_light+0x1a9/0x230 [ 82.677937][ T9784] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.684163][ T9784] do_writev+0x15b/0x330 [ 82.688392][ T9784] ? vfs_writev+0x2f0/0x2f0 [ 82.692872][ T9784] ? do_syscall_64+0x26/0x790 [ 82.697524][ T9784] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.703567][ T9784] ? do_syscall_64+0x26/0x790 [ 82.708232][ T9784] __x64_sys_writev+0x75/0xb0 [ 82.712885][ T9784] do_syscall_64+0xfa/0x790 [ 82.717366][ T9784] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.723232][ T9784] RIP: 0033:0x4458a0 [ 82.727104][ T9784] Code: 05 48 3d 01 f0 ff ff 0f 83 1d d3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 91 57 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 f4 d2 fb ff c3 48 83 ec 08 e8 7a 2b 00 00 [ 82.746683][ T9784] RSP: 002b:00007ffe5519de08 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 82.755081][ T9784] RAX: ffffffffffffffda RBX: 00007ffe5519de20 RCX: 00000000004458a0 [ 82.763160][ T9784] RDX: 0000000000000001 RSI: 00007ffe5519de50 RDI: 00000000000000f0 [ 82.771110][ T9784] RBP: 00007ffe5519de10 R08: 0000000000000000 R09: 00000000bb1414ac [ 82.779175][ T9784] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000003 [ 82.787138][ T9784] R13: 00007ffe5519de18 R14: 0000000000000000 R15: 0000000000000000 [ 82.795102][ T9784] Modules linked in: [ 82.799001][ T9784] CR2: ffff887f96501fff [ 82.803140][ T9784] ---[ end trace a08b63339b8095b2 ]--- [ 82.808579][ T9784] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 82.814732][ T9784] 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 9e 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 [ 82.834311][ T9784] RSP: 0018:ffffc90002087770 EFLAGS: 00010246 [ 82.840363][ T9784] RAX: dffffc0000000000 RBX: ffff8880964f2000 RCX: ffffffff0000feff [ 82.848331][ T9784] RDX: 1ffff10ff2ca03ff RSI: ffff888093c732f0 RDI: 0000000000000005 [ 82.856295][ T9784] RBP: ffffc900020878b0 R08: ffff8880a7486240 R09: ffffed1012c9e45d [ 82.864244][ T9784] R10: ffffed1012c9e45c R11: ffff8880964f22e3 R12: ffff887f96501fff [ 82.872202][ T9784] R13: 0000000000000100 R14: ffff888096501fff R15: ffff888093c73280 [ 82.880164][ T9784] FS: 0000000001734880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.889086][ T9784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.895652][ T9784] CR2: ffff887f96501fff CR3: 00000000a8645000 CR4: 00000000001406e0 [ 82.903657][ T9784] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.911620][ T9784] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.919589][ T9784] Kernel panic - not syncing: Fatal exception in interrupt [ 82.928218][ T9784] Kernel Offset: disabled [ 82.932549][ T9784] Rebooting in 86400 seconds..