I am running a Ubuntu Server guest on a Windows 10 host in Virtualbox.
- 2048MB Ram (host has 32GB)
- 4 CPUs (host has 4 cores, 8 threads)
- PAE/NX, VT-x/AMD-V enabled
- 128MB VRAM
- 10GB VDI disk
- Bridged IntelPRO/1000 MT Desktop Adapter
I am mostly running rtorrent through openvpn, downloading to mounted windows smb shares. using apache to communicate between rutorrent and rtorrent. everything is working fine so far, but I am crashing every hour or so, and this time I had top running and it outputted me the following messege when it crashed:
Message from syslogd@ubuntuserver at Jul 2 17:01:21 ...
kernel:[ 7706.657113] usercopy: Kernel memory exposure attempt detected from SLUB object 'vm_area_struct(1985:init.scope)' (offset 45, size 187)!
I am not an expert in the least in Linux so any help would greatly appreciated.
I have searched /var/log/kern.log for all occurences or "exposure" so hopefully these are the relevant log files:
19123 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238850] ------------[ cut here ]------------
19124 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238853] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'TCP(1226:apache2.service)' (offset 19, size 98)!
19125 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238884] WARNING: CPU: 0 PID: 5704 at mm/usercopy.c:75 usercopy_warn+0x81/0xa0
19126 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238884] Modules linked in: md4 cmac nls_utf8 cifs libarc4 fscache libdes xt_statistic xt_set ipt_rpfilter xt_multiport iptable_raw ip_set_hash_ip ip_set_hash_net ip_set vxlan ip6_udp_tun>
19127 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238943] raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel vmwgfx aesni_intel crypto_simd ttm cryptd drm_kms_helper>
19128 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238956] CPU: 0 PID: 5704 Comm: openvpn Tainted: G O 5.4.0-77-generic #86-Ubuntu
19129 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238957] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
19130 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238959] RIP: 0010:usercopy_warn+0x81/0xa0
19131 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238961] Code: 58 89 41 51 49 89 c0 49 c7 c2 19 47 57 89 49 89 f1 48 89 f9 4c 0f 45 d2 48 c7 c7 08 7a 58 89 4c 89 da 4c 89 d6 e8 b1 b1 7b 00 <0f> 0b 48 83 c4 18 c9 c3 48 c7 c6 ba 8e 5a 89>
19132 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238961] RSP: 0018:ffffb51a426d7c18 EFLAGS: 00010286
19133 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238962] RAX: 0000000000000000 RBX: 0000000000000062 RCX: 0000000000000006
19134 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238963] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff982b3da178c0
19135 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238964] RBP: ffffb51a426d7c30 R08: 00000000000002ab R09: 0000000000000004
19136 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238964] R10: 0000000000000000 R11: 0000000000000001 R12: ffff982b3bc00013
19137 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238965] R13: 0000000000000001 R14: ffff982b3bc00075 R15: 0000000000000000
19138 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238966] FS: 00007f68cc179cc0(0000) GS:ffff982b3da00000(0000) knlGS:0000000000000000
19139 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238967] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
19140 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238967] CR2: 00007f0745d20000 CR3: 000000007178a003 CR4: 00000000000606f0
19141 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238971] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
19142 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238972] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
19143 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238973] Call Trace:
19144 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238977] __check_heap_object+0xb1/0x120
19145 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238978] __check_object_size+0x13f/0x150
19146 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238980] simple_copy_to_iter+0x2b/0x50
19147 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238981] __skb_datagram_iter+0x19d/0x2d0
19148 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238983] ? __skb_wait_for_more_packets+0x170/0x170
19149 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238984] skb_copy_datagram_iter+0x40/0x90
19150 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238987] tun_do_read+0x48e/0x680
19151 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238989] ? wake_up_q+0x70/0x70
19152 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238991] tun_chr_read_iter+0x5b/0xa0
19153 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238993] new_sync_read+0x122/0x1b0
19154 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238995] __vfs_read+0x29/0x40
19155 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238996] vfs_read+0xab/0x160
19156 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238997] ksys_read+0x67/0xe0
19157 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.238999] __x64_sys_read+0x1a/0x20
19158 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239001] do_syscall_64+0x57/0x190
19159 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239003] entry_SYSCALL_64_after_hwframe+0x44/0xa9
19160 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239005] RIP: 0033:0x7f68cc938332
19161 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239006] Code: 9c 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb be 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48>
19162 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239007] RSP: 002b:00007ffc31a8d218 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
19163 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239008] RAX: ffffffffffffffda RBX: 00007ffc31a8d270 RCX: 00007f68cc938332
19164 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239008] RDX: 00000000000005fc RSI: 000055d5f9a845a8 RDI: 0000000000000004
19165 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239009] RBP: 00007ffc31a8d270 R08: 00000000000005fc R09: 000000000000000a
19166 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239009] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
19167 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239010] R13: 000055d5f80f2540 R14: 0000000000000000 R15: 0000000000000000
19168 Jul 2 09:11:23 ubuntuserver kernel: [ 1098.239012] ---[ end trace 92f904c7680db778 ]---
19828 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642191] ------------[ cut here ]------------
19829 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642193] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'task_struct(1842:session-5.scope)' (offset 554, size 238)!
19830 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642200] WARNING: CPU: 0 PID: 3580 at mm/usercopy.c:75 usercopy_warn+0x81/0xa0
19831 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642200] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel ipt_rpfilter xt_set xt_multiport iptable_raw ip_set_hash_net ip_set_hash_ip ip_set veth md4 cmac nls_utf8 cifs libarc4 fscache >
19832 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642235] raid1 raid0 multipath linear hid_generic usbhid hid vmwgfx crct10dif_pclmul crc32_pclmul ttm ghash_clmulni_intel drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops aes>
19833 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642245] CPU: 0 PID: 3580 Comm: openvpn Tainted: G O 5.4.0-77-generic #86-Ubuntu
19834 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642246] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
19835 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642248] RIP: 0010:usercopy_warn+0x81/0xa0
19836 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642249] Code: b8 b9 41 51 49 89 c0 49 c7 c2 19 47 b7 b9 49 89 f1 48 89 f9 4c 0f 45 d2 48 c7 c7 08 7a b8 b9 4c 89 da 4c 89 d6 e8 b1 b1 7b 00 <0f> 0b 48 83 c4 18 c9 c3 48 c7 c6 ba 8e ba b9>
19837 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642250] RSP: 0018:ffffb31a82c1fc18 EFLAGS: 00010286
19838 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642250] RAX: 0000000000000000 RBX: 00000000000000ee RCX: 0000000000000006
19839 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642251] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff8fe0bda178c0
19840 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642252] RBP: ffffb31a82c1fc30 R08: 00000000000002af R09: 0000000000000004
19841 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642252] R10: 0000000000000000 R11: 0000000000000001 R12: ffff8fe043a2022a
19842 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642253] R13: 0000000000000001 R14: ffff8fe043a20318 R15: 0000000000000000
19843 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642253] FS: 00007f26876f9cc0(0000) GS:ffff8fe0bda00000(0000) knlGS:0000000000000000
19844 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642254] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
19845 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642255] CR2: 00007f4b856cb000 CR3: 0000000071652006 CR4: 00000000000606f0
19846 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642257] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
19847 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642258] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
19848 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642258] Call Trace:
19849 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642261] __check_heap_object+0xb1/0x120
19850 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642263] __check_object_size+0x13f/0x150
19851 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642264] simple_copy_to_iter+0x2b/0x50
19852 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642266] __skb_datagram_iter+0x19d/0x2d0
19853 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642267] ? __skb_wait_for_more_packets+0x170/0x170
19854 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642268] skb_copy_datagram_iter+0x40/0x90
19855 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642270] tun_do_read+0x48e/0x680
19856 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642271] ? wake_up_q+0x70/0x70
19857 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642273] tun_chr_read_iter+0x5b/0xa0
19858 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642274] new_sync_read+0x122/0x1b0
19859 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642276] __vfs_read+0x29/0x40
19860 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642277] vfs_read+0xab/0x160
19861 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642278] ksys_read+0x67/0xe0
19862 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642279] __x64_sys_read+0x1a/0x20
19863 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642281] do_syscall_64+0x57/0x190
19864 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642283] entry_SYSCALL_64_after_hwframe+0x44/0xa9
19865 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642284] RIP: 0033:0x7f2687eb8332
19866 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642285] Code: 9c 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb be 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48>
19867 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642286] RSP: 002b:00007ffcb7f37ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
19868 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642286] RAX: ffffffffffffffda RBX: 00007ffcb7f37d00 RCX: 00007f2687eb8332
19869 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642287] RDX: 00000000000005fc RSI: 000056282b8a45a8 RDI: 0000000000000004
19870 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642287] RBP: 00007ffcb7f37d00 R08: 00000000000005fc R09: 000000000000000a
19871 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642288] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
19872 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642288] R13: 000056282b143540 R14: 0000000000000000 R15: 0000000000000000
19873 Jul 2 10:05:18 ubuntuserver kernel: [ 2198.642290] ---[ end trace bf50f5c8147884f1 ]---
23598 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365633] ------------[ cut here ]------------
23599 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365636] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'files_cache(1779:f9ddcba6cfabfe4ef6ec2b1f746ce546011ed403745e465e75a235411c0ef918)' (>
23600 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365657] WARNING: CPU: 0 PID: 7279 at mm/usercopy.c:75 usercopy_warn+0x81/0xa0
23601 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365657] Modules linked in: msr vxlan ip6_udp_tunnel udp_tunnel xt_set ipt_rpfilter xt_multiport iptable_raw ip_set_hash_net ip_set_hash_ip ip_set veth xt_statistic xt_nat xt_tcpudp xt_ma>
23602 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365697] raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel vmwgfx ttm drm_kms_helper syscopyarea sysfillrect sysimg>
23603 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365708] CPU: 0 PID: 7279 Comm: openvpn Tainted: G O 5.4.0-77-generic #86-Ubuntu
23604 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365708] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
23605 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365710] RIP: 0010:usercopy_warn+0x81/0xa0
23606 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365711] Code: 98 88 41 51 49 89 c0 49 c7 c2 19 47 97 88 49 89 f1 48 89 f9 4c 0f 45 d2 48 c7 c7 08 7a 98 88 4c 89 da 4c 89 d6 e8 b1 b1 7b 00 <0f> 0b 48 83 c4 18 c9 c3 48 c7 c6 ba 8e 9a 88>
23607 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365712] RSP: 0018:ffffb77bc2c0fc18 EFLAGS: 00010286
23608 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365713] RAX: 0000000000000000 RBX: 0000000000000030 RCX: 0000000000000006
23609 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365713] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff9015bda178c0
23610 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365714] RBP: ffffb77bc2c0fc30 R08: 00000000000002a5 R09: 0000000000000004
23611 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365714] R10: 0000000000000000 R11: 0000000000000001 R12: ffff9015b3668045
23612 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365715] R13: 0000000000000001 R14: ffff9015b3668075 R15: 0000000000000000
23613 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365715] FS: 00007fad0446fcc0(0000) GS:ffff9015bda00000(0000) knlGS:0000000000000000
23614 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365716] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
23615 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365717] CR2: 00007f5a90143000 CR3: 00000000733e8003 CR4: 00000000000606f0
23616 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365719] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
23617 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365720] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
23618 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365720] Call Trace:
23619 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365725] __check_heap_object+0xb1/0x120
23620 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365726] __check_object_size+0x13f/0x150
23621 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365728] simple_copy_to_iter+0x2b/0x50
23622 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365730] __skb_datagram_iter+0x19d/0x2d0
23623 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365731] ? __skb_wait_for_more_packets+0x170/0x170
23624 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365732] skb_copy_datagram_iter+0x40/0x90
23625 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365734] tun_do_read+0x48e/0x680
23626 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365751] ? wake_up_q+0x70/0x70
23627 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365753] tun_chr_read_iter+0x5b/0xa0
23628 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365755] new_sync_read+0x122/0x1b0
23629 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365757] __vfs_read+0x29/0x40
23630 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365758] vfs_read+0xab/0x160
23631 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365771] ksys_read+0x67/0xe0
23632 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365772] __x64_sys_read+0x1a/0x20
23633 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365774] do_syscall_64+0x57/0x190
23634 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365776] entry_SYSCALL_64_after_hwframe+0x44/0xa9
23635 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365777] RIP: 0033:0x7fad04c2e332
23636 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365778] Code: 9c 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb be 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48>
23637 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365779] RSP: 002b:00007ffd1079e418 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
23638 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365780] RAX: ffffffffffffffda RBX: 00007ffd1079e470 RCX: 00007fad04c2e332
23639 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365780] RDX: 00000000000005fc RSI: 000055f8cbde5948 RDI: 0000000000000004
23640 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365791] RBP: 00007ffd1079e470 R08: 00000000000005fc R09: 000000000000000a
23641 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365792] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
23642 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365792] R13: 000055f8cab79540 R14: 0000000000000000 R15: 0000000000000000
23643 Jul 2 13:53:08 ubuntuserver kernel: [ 2195.365794] ---[ end trace 450a76c5d79c77ee ]---
24934 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809863] ------------[ cut here ]------------
24935 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809865] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLUB object 'mnt_cache' (offset 143, size 2)!
24936 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809872] WARNING: CPU: 3 PID: 11965 at mm/usercopy.c:75 usercopy_warn+0x81/0xa0
24937 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809873] Modules linked in: xt_statistic vxlan ip6_udp_tunnel udp_tunnel xt_set ipt_rpfilter xt_multiport iptable_raw ip_set_hash_ip ip_set_hash_net ip_set veth xt_nat xt_tcpudp xt_mark i>
24938 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809901] raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_pclmul crc32_pclmul ghash_clmulni_intel vmwgfx aesni_intel ttm drm_kms_helper crypto_simd syscopyarea cryptd sysfillrec>
24939 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809939] CPU: 3 PID: 11965 Comm: openvpn Tainted: G O 5.4.0-77-generic #86-Ubuntu
24940 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809940] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
24941 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809941] RIP: 0010:usercopy_warn+0x81/0xa0
24942 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809942] Code: 58 9a 41 51 49 89 c0 49 c7 c2 19 47 57 9a 49 89 f1 48 89 f9 4c 0f 45 d2 48 c7 c7 08 7a 58 9a 4c 89 da 4c 89 d6 e8 b1 b1 7b 00 <0f> 0b 48 83 c4 18 c9 c3 48 c7 c6 ba 8e 5a 9a>
24943 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809943] RSP: 0018:ffffa4e60806fc18 EFLAGS: 00010286
24944 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809944] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000006
24945 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809944] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff964ffdb978c0
24946 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809945] RBP: ffffa4e60806fc30 R08: 00000000000002b3 R09: 0000000000000004
24947 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809945] R10: 0000000000000000 R11: 0000000000000001 R12: ffff964fba0381cf
24948 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809946] R13: 0000000000000001 R14: ffff964fba0381d1 R15: 0000000000000000
24949 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809947] FS: 00007feb9eea0cc0(0000) GS:ffff964ffdb80000(0000) knlGS:0000000000000000
24950 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809948] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
24951 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809948] CR2: 00007fdc5304332c CR3: 000000007123e003 CR4: 00000000000606e0
24952 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809951] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
24953 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
24954 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809952] Call Trace:
24955 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809955] __check_heap_object+0xb1/0x120
24956 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809956] __check_object_size+0x13f/0x150
24957 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809958] simple_copy_to_iter+0x2b/0x50
24958 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809960] __skb_datagram_iter+0x19d/0x2d0
24959 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809961] ? __skb_wait_for_more_packets+0x170/0x170
24960 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809962] skb_copy_datagram_iter+0x40/0x90
24961 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809964] tun_do_read+0x48e/0x680
24962 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809966] ? wake_up_q+0x70/0x70
24963 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809967] tun_chr_read_iter+0x5b/0xa0
24964 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809969] new_sync_read+0x122/0x1b0
24965 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809985] __vfs_read+0x29/0x40
24966 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809986] vfs_read+0xab/0x160
24967 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809987] ksys_read+0x67/0xe0
24968 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809989] __x64_sys_read+0x1a/0x20
24969 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809991] do_syscall_64+0x57/0x190
24970 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809992] entry_SYSCALL_64_after_hwframe+0x44/0xa9
24971 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809993] RIP: 0033:0x7feb9f65f332
24972 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809994] Code: 9c 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb be 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48>
24973 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809995] RSP: 002b:00007ffd7ea61018 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
24974 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809996] RAX: ffffffffffffffda RBX: 00007ffd7ea61070 RCX: 00007feb9f65f332
24975 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809996] RDX: 00000000000005fc RSI: 00005626cf1a9948 RDI: 0000000000000004
24976 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809997] RBP: 00007ffd7ea61070 R08: 00000000000005fc R09: 000000000000000a
24977 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809997] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
24978 Jul 2 14:58:13 ubuntuserver kernel: [ 319.809998] R13: 00005626cdae3540 R14: 0000000000000000 R15: 0000000000000000
24979 Jul 2 14:58:13 ubuntuserver kernel: [ 319.810000] ---[ end trace 29288b72c43a7e01 ]---
