i make android images on ubuntu but sometimes the server hang, I found the log from /var/log/kern.log like below:
May 13 22:39:49 buildsrv-198 kernel: [562085.261803] BUG: Bad rss-counter state mm:ffff88126ec7bb80 idx:1 val:1
May 13 22:51:50 buildsrv-198 kernel: [562801.158633] general protection fault: 0000 [#2] SMP
May 13 22:51:50 buildsrv-198 kernel: [562801.249985] Modules linked in: iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables esn_cfs(OF) binfmt_misc ipmi_devintf dcdbas x86_pkg_temp_thermal coretemp kvm_intel kvm mxm_wmi crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd lpc_ich mei_me mei shpchp ipmi_si wmi acpi_power_meter mac_hid lp parport tg3 ahci ptp libahci megaraid_sas pps_core
May 13 22:51:50 buildsrv-198 kernel: [562801.547292] CPU: 49 PID: 196401 Comm: GC Thread#33 Tainted: GF B D O 3.13.0-32-generic #57-Ubuntu
May 13 22:51:50 buildsrv-198 kernel: [562801.647136] Hardware name: Dell Inc. PowerEdge R730xd/0WCJNT, BIOS 2.8.0 005/17/2018
May 13 22:51:50 buildsrv-198 kernel: [562801.746548] task: ffff8800273917f0 ti: ffff880134d46000 task.ti: ffff880134d46000
May 13 22:51:50 buildsrv-198 kernel: [562801.845820] RIP: 0010:[<ffffffff810b0c69>] [<ffffffff810b0c69>] down_read_trylock+0x9/0x30
May 13 22:51:50 buildsrv-198 kernel: [562801.946341] RSP: 0000:ffff880134d476c8 EFLAGS: 00010282
May 13 22:51:50 buildsrv-198 kernel: [562802.046345] RAX: 0000000000000000 RBX: ffff881267e68080 RCX: ffff880134d47828
May 13 22:51:50 buildsrv-198 kernel: [562802.146566] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 800000122b41290e
May 13 22:51:50 buildsrv-198 kernel: [562802.246571] RBP: ffff880134d476c8 R08: 000000000000000c R09: 0000000000000000
May 13 22:51:50 buildsrv-198 kernel: [562802.346575] R10: ffff88107fffbf00 R11: 0000000000000013 R12: ffff881267e68081
May 13 22:51:50 buildsrv-198 kernel: [562802.446796] R13: ffffea0027b91000 R14: 800000122b41290e R15: ffff880134d47808
May 13 22:51:50 buildsrv-198 kernel: [562802.547263] FS: 00007f93b9169700(0000) GS:ffff88203ed00000(0000) knlGS:0000000000000000
May 13 22:51:50 buildsrv-198 kernel: [562802.649305] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May 13 22:51:50 buildsrv-198 kernel: [562802.751346] CR2: 00000000821b4840 CR3: 00000001170ea000 CR4: 00000000003407e0
May 13 22:51:50 buildsrv-198 kernel: [562802.854774] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May 13 22:51:50 buildsrv-198 kernel: [562802.957740] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
May 13 22:51:50 buildsrv-198 kernel: [562803.060107] Stack:
May 13 22:51:50 buildsrv-198 kernel: [562803.161742] ffff880134d476f8 ffffffff81184b45 ffffea0027b91000 0000000000000000
May 13 22:51:50 buildsrv-198 kernel: [562803.266012] ffff880134d47900 ffff881267e68081 ffff880134d47768 ffffffff81184d9f
May 13 22:51:50 buildsrv-198 kernel: [562803.370635] ffffea0031a71b80 ffff880134d47828 ffff880134d47828 ffffffff00000000
May 13 22:51:50 buildsrv-198 kernel: [562803.473982] Call Trace:
May 13 22:51:50 buildsrv-198 kernel: [562803.574946] [<ffffffff81184b45>] page_lock_anon_vma_read+0x55/0x110
May 13 22:51:50 buildsrv-198 kernel: [562803.675928] [<ffffffff81184d9f>] page_referenced+0x19f/0x310
May 13 22:51:50 buildsrv-198 kernel: [562803.775281] [<ffffffff81160f7c>] shrink_page_list+0x45c/0xa60
May 13 22:51:50 buildsrv-198 kernel: [562803.873599] [<ffffffff81161c02>] shrink_inactive_list+0x1c2/0x530
May 13 22:51:50 buildsrv-198 kernel: [562803.971592] [<ffffffff811626f5>] shrink_lruvec+0x355/0x6f0
May 13 22:51:50 buildsrv-198 kernel: [562804.068770] [<ffffffff81162af6>] shrink_zone+0x66/0x1a0
May 13 22:51:50 buildsrv-198 kernel: [562804.164644] [<ffffffff81162ff0>] do_try_to_free_pages+0xe0/0x540
May 13 22:51:50 buildsrv-198 kernel: [562804.260438] [<ffffffff8116353c>] try_to_free_pages+0xec/0x180
May 13 22:51:50 buildsrv-198 kernel: [562804.356260] [<ffffffff81158336>] __alloc_pages_nodemask+0x7d6/0xb80
May 13 22:51:50 buildsrv-198 kernel: [562804.452624] [<ffffffff81198a1a>] alloc_pages_vma+0x9a/0x140
May 13 22:51:50 buildsrv-198 kernel: [562804.549125] [<ffffffff811ac2db>] do_huge_pmd_anonymous_page+0x10b/0x410
May 13 22:51:50 buildsrv-198 kernel: [562804.646384] [<ffffffff81178a48>] handle_mm_fault+0x198/0xf00
May 13 22:51:50 buildsrv-198 kernel: [562804.743674] [<ffffffff8109a7f0>] ? wake_up_state+0x10/0x20
May 13 22:51:50 buildsrv-198 kernel: [562804.841042] [<ffffffff810d7c56>] ? wake_futex+0x66/0x90
May 13 22:51:50 buildsrv-198 kernel: [562804.937896] [<ffffffff81727be4>] __do_page_fault+0x184/0x560
May 13 22:51:50 buildsrv-198 kernel: [562805.034942] [<ffffffff8111155c>] ? acct_account_cputime+0x1c/0x20
May 13 22:51:50 buildsrv-198 kernel: [562805.132337] [<ffffffff8109d7db>] ? account_user_time+0x8b/0xa0
May 13 22:51:50 buildsrv-198 kernel: [562805.229542] [<ffffffff8109ddf4>] ? vtime_account_user+0x54/0x60
May 13 22:51:50 buildsrv-198 kernel: [562805.326909] [<ffffffff81727fda>] do_page_fault+0x1a/0x70
May 13 22:51:50 buildsrv-198 kernel: [562805.422838] [<ffffffff81724448>] page_fault+0x28/0x30
May 13 22:51:50 buildsrv-198 kernel: [562805.516944] Code: 6e 2e 67 00 48 83 c4 08 5b 5d c3 48 89 45 f0 e8 76 1a 67 00 48 8b 45 f0 eb df 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 <48> 8b 07 48 89 c2 48 83 c2 01 7e 07 f0 48 0f b1 17 75 f0 48 f7
May 13 22:51:50 buildsrv-198 kernel: [562805.711300] RIP [<ffffffff810b0c69>] down_read_trylock+0x9/0x30
May 13 22:51:50 buildsrv-198 kernel: [562805.806794] RSP <ffff880134d476c8>
May 13 22:51:50 buildsrv-198 kernel: [562806.180028] ---[ end trace 281873ef9adf388e ]---
May 13 22:51:50 buildsrv-198 kernel: [562806.280699] ------------[ cut here ]------------