[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.975091][ T27] audit: type=1800 audit(1579650942.958:25): pid=9481 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.995383][ T27] audit: type=1800 audit(1579650942.958:26): pid=9481 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 84.051694][ T27] audit: type=1800 audit(1579650942.958:27): pid=9481 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 '10.128.0.66' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.876531][ T9634] IPVS: ftp: loaded support on port[0] = 21 [ 96.924763][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.933750][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.942013][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.950318][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.958570][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.967055][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.975287][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.983476][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.991727][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. [ 96.999890][ T9635] netlink: 'syz-executor138': attribute type 1 has an invalid length. executing program [ 97.067255][ T9636] BUG: unable to handle page fault for address: ffff887fa6e097ff [ 97.074994][ T9636] #PF: supervisor read access in kernel mode [ 97.080964][ T9636] #PF: error_code(0x0000) - not-present page [ 97.086925][ T9636] PGD 0 P4D 0 [ 97.090289][ T9636] Oops: 0000 [#1] PREEMPT SMP KASAN [ 97.095471][ T9636] CPU: 0 PID: 9636 Comm: syz-executor138 Not tainted 5.5.0-rc7-syzkaller #0 [ 97.104126][ T9636] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.114211][ T9636] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 97.120356][ T9636] 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 [ 97.140136][ T9636] RSP: 0018:ffffc90002777770 EFLAGS: 00010246 [ 97.146191][ T9636] RAX: dffffc0000000000 RBX: ffff8880a6df9800 RCX: ffffffff0000feff [ 97.154209][ T9636] RDX: 1ffff10ff4dc12ff RSI: ffff8880a00eb6f0 RDI: 0000000000000005 [ 97.162163][ T9636] RBP: ffffc900027778b0 R08: ffff888092e42300 R09: ffffed1014dbf35d [ 97.170321][ T9636] R10: ffffed1014dbf35c R11: ffff8880a6df9ae3 R12: ffff887fa6e097ff [ 97.178281][ T9636] R13: 0000000000000100 R14: ffff8880a6e097ff R15: ffff8880a00eb680 [ 97.186299][ T9636] FS: 0000000001c28880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.195226][ T9636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.201921][ T9636] CR2: ffff887fa6e097ff CR3: 000000009572b000 CR4: 00000000001406f0 [ 97.209889][ T9636] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.217892][ T9636] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.225911][ T9636] Call Trace: [ 97.229311][ T9636] ? generic_xdp_tx+0x740/0x740 [ 97.234160][ T9636] ? rcu_read_lock_held+0x9c/0xb0 [ 97.239183][ T9636] do_xdp_generic+0x30/0x50 [ 97.243672][ T9636] tun_get_user+0x2bcd/0x3fc0 [ 97.248404][ T9636] ? __kasan_check_read+0x11/0x20 [ 97.253427][ T9636] ? aa_file_perm+0x617/0x1600 [ 97.258237][ T9636] ? tun_build_skb.isra.0+0x1470/0x1470 [ 97.263778][ T9636] ? rcu_read_lock_held+0x9c/0xb0 [ 97.268793][ T9636] ? __kasan_check_read+0x11/0x20 [ 97.273818][ T9636] tun_chr_write_iter+0xbd/0x156 [ 97.278758][ T9636] do_iter_readv_writev+0x5f8/0x8f0 [ 97.284505][ T9636] ? no_seek_end_llseek_size+0x70/0x70 [ 97.289989][ T9636] ? apparmor_file_permission+0x27/0x30 [ 97.295523][ T9636] ? rw_verify_area+0x126/0x360 [ 97.300357][ T9636] do_iter_write+0x184/0x610 [ 97.304943][ T9636] ? dup_iter+0x260/0x260 [ 97.309265][ T9636] vfs_writev+0x1b3/0x2f0 [ 97.313639][ T9636] ? vfs_iter_write+0xb0/0xb0 [ 97.318306][ T9636] ? find_held_lock+0x35/0x130 [ 97.323055][ T9636] ? __do_page_fault+0x56a/0xd80 [ 97.327981][ T9636] ? lock_downgrade+0x920/0x920 [ 97.332833][ T9636] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.339161][ T9636] ? __fget_light+0x1a9/0x230 [ 97.343821][ T9636] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.350183][ T9636] do_writev+0x15b/0x330 [ 97.354413][ T9636] ? vfs_writev+0x2f0/0x2f0 [ 97.358901][ T9636] ? do_syscall_64+0x26/0x790 [ 97.363619][ T9636] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.369692][ T9636] ? do_syscall_64+0x26/0x790 [ 97.374370][ T9636] __x64_sys_writev+0x75/0xb0 [ 97.379041][ T9636] do_syscall_64+0xfa/0x790 [ 97.383629][ T9636] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.389622][ T9636] RIP: 0033:0x441f50 [ 97.393521][ T9636] 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 [ 97.413449][ T9636] RSP: 002b:00007ffd86f46a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 97.421892][ T9636] RAX: ffffffffffffffda RBX: 00007ffd86f46a70 RCX: 0000000000441f50 [ 97.429857][ T9636] RDX: 0000000000000001 RSI: 00007ffd86f46aa0 RDI: 00000000000000f0 [ 97.437817][ T9636] RBP: 0000000000000000 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 97.445870][ T9636] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000017a5c [ 97.453921][ T9636] R13: 0000000000402da0 R14: 0000000000000000 R15: 0000000000000000 [ 97.461885][ T9636] Modules linked in: [ 97.465769][ T9636] CR2: ffff887fa6e097ff [ 97.469911][ T9636] ---[ end trace 75ba3459d5f1797a ]--- [ 97.475358][ T9636] RIP: 0010:do_xdp_generic.part.0+0x479/0x1790 [ 97.481501][ T9636] 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 [ 97.501090][ T9636] RSP: 0018:ffffc90002777770 EFLAGS: 00010246 [ 97.507142][ T9636] RAX: dffffc0000000000 RBX: ffff8880a6df9800 RCX: ffffffff0000feff [ 97.515101][ T9636] RDX: 1ffff10ff4dc12ff RSI: ffff8880a00eb6f0 RDI: 0000000000000005 [ 97.523071][ T9636] RBP: ffffc900027778b0 R08: ffff888092e42300 R09: ffffed1014dbf35d [ 97.531085][ T9636] R10: ffffed1014dbf35c R11: ffff8880a6df9ae3 R12: ffff887fa6e097ff [ 97.539045][ T9636] R13: 0000000000000100 R14: ffff8880a6e097ff R15: ffff8880a00eb680 [ 97.547060][ T9636] FS: 0000000001c28880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.555979][ T9636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.562675][ T9636] CR2: ffff887fa6e097ff CR3: 000000009572b000 CR4: 00000000001406f0 [ 97.570633][ T9636] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.578764][ T9636] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.586721][ T9636] Kernel panic - not syncing: Fatal exception in interrupt [ 97.595573][ T9636] Kernel Offset: disabled [ 97.599902][ T9636] Rebooting in 86400 seconds..