It seems to me that this is not a kernel problem. I guess that there was a NULL pointer dereference in RSG-Linux-Shipping when the system started entering severe memory pressure. Then, due to severe memory pressure, many memory allocation requests started stalling. But there is no kernel oops messages, which means that the kernel should not be in inconsistent state.
---------- Dec 23 20:08:25 gooseberry kernel: [83579.182919] vboxdrv: 0000000000000000 VBoxEhciR0.r0 Dec 23 20:37:43 gooseberry kernel: [85336.572498] RSG-Linux-Shipp[4986]: segfault at 0 ip (null) sp 00007fffe2493778 error 14 in RSG-Linux-Shipping[400000+638c000] Dec 23 20:38:58 gooseberry kernel: [85389.847138] rtkit-daemon: page allocation stalls for 10224ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:02 gooseberry kernel: [85392.351015] nacl_helper: page allocation stalls for 10660ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:03 gooseberry kernel: [85394.373753] CIPCServer::Thr: page allocation stalls for 13060ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:04 gooseberry kernel: [85394.418114] redshift: page allocation stalls for 10768ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:04 gooseberry kernel: [85394.626684] java: page allocation stalls for 13336ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:05 gooseberry kernel: [85394.710998] java: page allocation stalls for 14172ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:05 gooseberry kernel: [85395.064425] gmain: page allocation stalls for 12828ms, order:0, mode:0x1420848(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), nodemask=(null) Dec 23 20:39:06 gooseberry kernel: [85396.166591] java: page allocation stalls for 12360ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:07 gooseberry kernel: [85396.182852] dropbox: page allocation stalls for 14584ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85396.444863] java: page allocation stalls for 15116ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85397.998896] SlateLoading1: page allocation stalls for 11004ms, order:0, mode:0x1400840(GFP_NOFS|__GFP_NOFAIL), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85399.180885] Chrome_FileThre: page allocation stalls for 12120ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85399.937947] java: page allocation stalls for 20236ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85402.716378] CHTTPClientThre: page allocation stalls for 21712ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85403.440140] keybase: page allocation stalls for 21264ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85404.113506] chrome: page allocation stalls for 13840ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85404.148676] dropbox: page allocation stalls for 20224ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85404.415977] dropbox: page allocation stalls for 20492ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85404.788766] dropbox: page allocation stalls for 23188ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85406.296349] keybase: page allocation stalls for 24120ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85406.912627] Watchdog: page allocation stalls for 10744ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85408.143462] java: page allocation stalls for 27644ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85408.314888] java: page allocation stalls for 24508ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85408.915217] java: page allocation stalls for 29212ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85409.229332] java: page allocation stalls for 28728ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85409.759119] chrome: page allocation stalls for 16468ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85409.905215] java: page allocation stalls for 30200ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85409.926299] gmain: page allocation stalls for 27692ms, order:0, mode:0x1420848(GFP_NOFS|__GFP_NOFAIL|__GFP_HARDWALL|__GFP_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85410.577666] nmbd: page allocation stalls for 16768ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85410.609667] dockerd: page allocation stalls for 29744ms, order:0, mode:0x14200ca(GFP_HIGHUSER_MOVABLE), nodemask=(null) Dec 23 20:39:08 gooseberry kernel: [85410.785053] chrome: page allocation stalls for 19524ms, order:0, mode:0x14201ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD), nodemask=(null) ---------- Mem-Info: reports that 4GB of free swap space was depleted in only 6 seconds, which suggests that a memory hog userspace application was running. ---------- Dec 23 20:39:01 gooseberry kernel: [85389.847185] Mem-Info: Dec 23 20:39:01 gooseberry kernel: [85389.847187] active_anon:3178073 inactive_anon:289767 isolated_anon:6264 Dec 23 20:39:01 gooseberry kernel: [85389.847187] active_file:133 inactive_file:271 isolated_file:0 Dec 23 20:39:01 gooseberry kernel: [85389.847187] unevictable:426 dirty:0 writeback:338453 unstable:0 Dec 23 20:39:01 gooseberry kernel: [85389.847187] slab_reclaimable:61000 slab_unreclaimable:211358 Dec 23 20:39:01 gooseberry kernel: [85389.847187] mapped:106335 shmem:65393 pagetables:35812 bounce:0 Dec 23 20:39:01 gooseberry kernel: [85389.847187] free:33405 free_pcp:1099 free_cma:0 Dec 23 20:39:01 gooseberry kernel: [85389.847189] Node 0 active_anon:12712292kB inactive_anon:1159068kB active_file:532kB inactive_file:1084kB unevictable:1704kB isolated(anon):25056kB isolated(file):0kB mapped:425340kB dirty:0kB writeback:1353812kB shmem:261572kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Dec 23 20:39:01 gooseberry kernel: [85389.847190] Node 0 DMA free:15360kB min:60kB low:72kB high:84kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB Dec 23 20:39:01 gooseberry kernel: [85389.847192] lowmem_reserve[]: 0 3110 15885 15885 15885 Dec 23 20:39:01 gooseberry kernel: [85389.847193] Node 0 DMA32 free:64176kB min:13220kB low:16524kB high:19828kB active_anon:2276644kB inactive_anon:340684kB active_file:56kB inactive_file:536kB unevictable:780kB writepending:390436kB present:3309056kB managed:3243468kB mlocked:780kB kernel_stack:1312kB pagetables:12952kB bounce:0kB free_pcp:1856kB local_pcp:168kB free_cma:0kB Dec 23 20:39:01 gooseberry kernel: [85389.847195] lowmem_reserve[]: 0 0 12774 12774 12774 Dec 23 20:39:01 gooseberry kernel: [85389.847197] Node 0 Normal free:54084kB min:54296kB low:67868kB high:81440kB active_anon:10435668kB inactive_anon:818132kB active_file:476kB inactive_file:792kB unevictable:924kB writepending:963316kB present:13367296kB managed:13084940kB mlocked:924kB kernel_stack:25840kB pagetables:130296kB bounce:0kB free_pcp:2540kB local_pcp:324kB free_cma:0kB Dec 23 20:39:02 gooseberry kernel: [85389.847199] lowmem_reserve[]: 0 0 0 0 0 Dec 23 20:39:02 gooseberry kernel: [85389.847200] Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB Dec 23 20:39:02 gooseberry kernel: [85389.847205] Node 0 DMA32: 5547*4kB (UMEH) 3156*8kB (UMH) 1053*16kB (UMH) 8*32kB (UM) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 64540kB Dec 23 20:39:02 gooseberry kernel: [85389.847210] Node 0 Normal: 13236*4kB (UME) 151*8kB (M) 1*16kB (M) 1*32kB (M) 1*64kB (M) 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 54264kB Dec 23 20:39:02 gooseberry kernel: [85389.847215] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Dec 23 20:39:02 gooseberry kernel: [85389.847215] 404744 total pagecache pages Dec 23 20:39:02 gooseberry kernel: [85389.847217] 338839 pages in swap cache Dec 23 20:39:02 gooseberry kernel: [85389.847217] Swap cache stats: add 993692, delete 656085, find 6361/8189 Dec 23 20:39:02 gooseberry kernel: [85389.847218] Free swap = 4342524kB Dec 23 20:39:02 gooseberry kernel: [85389.847218] Total swap = 8302588kB Dec 23 20:39:02 gooseberry kernel: [85389.847218] 4173086 pages RAM Dec 23 20:39:02 gooseberry kernel: [85389.847219] 0 pages HighMem/MovableOnly Dec 23 20:39:02 gooseberry kernel: [85389.847219] 87144 pages reserved Dec 23 20:39:02 gooseberry kernel: [85389.847219] 0 pages cma reserved Dec 23 20:39:02 gooseberry kernel: [85389.847219] 0 pages hwpoisoned Dec 23 20:39:08 gooseberry kernel: [85410.577713] Mem-Info: Dec 23 20:39:08 gooseberry kernel: [85410.577716] active_anon:2527457 inactive_anon:253443 isolated_anon:6631 Dec 23 20:39:08 gooseberry kernel: [85410.577716] active_file:213 inactive_file:584 isolated_file:0 Dec 23 20:39:08 gooseberry kernel: [85410.577716] unevictable:426 dirty:0 writeback:738139 unstable:0 Dec 23 20:39:08 gooseberry kernel: [85410.577716] slab_reclaimable:61984 slab_unreclaimable:374577 Dec 23 20:39:08 gooseberry kernel: [85410.577716] mapped:100248 shmem:60318 pagetables:35812 bounce:0 Dec 23 20:39:08 gooseberry kernel: [85410.577716] free:33312 free_pcp:733 free_cma:0 Dec 23 20:39:08 gooseberry kernel: [85410.577718] Node 0 active_anon:10109828kB inactive_anon:1013772kB active_file:852kB inactive_file:2336kB unevictable:1704kB isolated(anon):26524kB isolated(file):0kB mapped:400992kB dirty:0kB writeback:2952556kB shmem:241272kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Dec 23 20:39:08 gooseberry kernel: [85410.577718] Node 0 DMA free:15360kB min:60kB low:72kB high:84kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15360kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB Dec 23 20:39:08 gooseberry kernel: [85410.577720] lowmem_reserve[]: 0 3110 15885 15885 15885 Dec 23 20:39:08 gooseberry kernel: [85410.577722] Node 0 DMA32 free:64136kB min:13220kB low:16524kB high:19828kB active_anon:1771440kB inactive_anon:169676kB active_file:36kB inactive_file:504kB unevictable:780kB writepending:474532kB present:3309056kB managed:3243468kB mlocked:780kB kernel_stack:1312kB pagetables:12952kB bounce:0kB free_pcp:1404kB local_pcp:264kB free_cma:0kB Dec 23 20:39:08 gooseberry kernel: [85410.577724] lowmem_reserve[]: 0 0 12774 12774 12774 Dec 23 20:39:08 gooseberry kernel: [85410.577725] Node 0 Normal free:53752kB min:54296kB low:67868kB high:81440kB active_anon:8339364kB inactive_anon:842372kB active_file:816kB inactive_file:1832kB unevictable:924kB writepending:2478120kB present:13367296kB managed:13084940kB mlocked:924kB kernel_stack:25840kB pagetables:130296kB bounce:0kB free_pcp:1528kB local_pcp:640kB free_cma:0kB Dec 23 20:39:08 gooseberry kernel: [85410.577727] lowmem_reserve[]: 0 0 0 0 0 Dec 23 20:39:08 gooseberry kernel: [85410.577729] Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15360kB Dec 23 20:39:08 gooseberry kernel: [85410.577733] Node 0 DMA32: 9796*4kB (ME) 2774*8kB (MH) 135*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 63536kB Dec 23 20:39:08 gooseberry kernel: [85410.577738] Node 0 Normal: 13584*4kB (UMH) 10*8kB (M) 3*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 54464kB Dec 23 20:39:08 gooseberry kernel: [85410.577743] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Dec 23 20:39:08 gooseberry kernel: [85410.577743] 799496 total pagecache pages Dec 23 20:39:08 gooseberry kernel: [85410.577745] 738323 pages in swap cache Dec 23 20:39:08 gooseberry kernel: [85410.577746] Swap cache stats: add 2078331, delete 1342753, find 6426/8297 Dec 23 20:39:08 gooseberry kernel: [85410.577746] Free swap = 0kB Dec 23 20:39:08 gooseberry kernel: [85410.577746] Total swap = 8302588kB Dec 23 20:39:08 gooseberry kernel: [85410.577747] 4173086 pages RAM Dec 23 20:39:08 gooseberry kernel: [85410.577747] 0 pages HighMem/MovableOnly Dec 23 20:39:08 gooseberry kernel: [85410.577747] 87144 pages reserved Dec 23 20:39:08 gooseberry kernel: [85410.577747] 0 pages cma reserved Dec 23 20:39:08 gooseberry kernel: [85410.577748] 0 pages hwpoisoned ---------- Since all swap memory was depleted and free: of Node 0 Normal was below min: watermark, I guess that the system started invoking the OOM killer. I don't know what happened between ---------- Dec 23 20:39:08 gooseberry kernel: [85410.785097] R13: 00007fff53ca4cf0 R14: 0000022ee7567c40 R15: 00007fff53ca4c88 Dec 23 20:41:25 gooseberry kernel: [ 0.000000] microcode: microcode updated early to revision 0x29, date = 2013-06-12 ---------- but it seems that there was a system reboot. Did you press power cycle button? (If not, maybe kernel panic occurred after killing all OOM-killable processes.) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1739928 Title: Kernel segfault playing EVERSPACE Status in linux package in Ubuntu: Confirmed Bug description: Here is the stacktrace: https://paste.ubuntu.com/26240799 ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: linux-image-4.13.0-21-generic 4.13.0-21.24 ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13 Uname: Linux 4.13.0-21-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.7-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: vadi 7458 F.... pulseaudio /dev/snd/controlC0: vadi 7458 F.... pulseaudio CurrentDesktop: Unity:Unity7:ubuntu Date: Sun Dec 24 03:47:54 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2012-03-23 (2101 days ago) InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) MachineType: Gigabyte Technology Co., Ltd. Z68AP-D3 ProcFB: 0 VESA VGA 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-21-generic root=UUID=20aa0109-67bb-46a0-95c6-626f0f0487eb ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.13.0-21-generic N/A linux-backports-modules-4.13.0-21-generic N/A linux-firmware 1.169.1 RfKill: 0: phy0: Wireless LAN Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/12/2011 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: FB dmi.board.name: Z68AP-D3 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFB:bd10/12/2011:svnGigabyteTechnologyCo.,Ltd.:pnZ68AP-D3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnZ68AP-D3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: Z68AP-D3 dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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