@sasikumarpc - Ok. So when you say below v4.18 kernel fixes it, does it mean with increased memory or is it with the same setup where the issue was originally seen?
Issue resolved Kernel Version ----------------------------- 4.18.0-8-generic -- 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/1795453 Title: IO's are issued with incorrect Scatter Gather Buffer Status in linux package in Ubuntu: Confirmed Bug description: We have observed that OS is sending the IO's (SCSI Read/Write) with incorrect Scatter Gather Buffer address . i.e OS is sending the IO with 64 bit Scatter Gather Buffer address , such that if we add the length with buffer address then it causes the roll over . Here is the data we captured in our driver (Printed the SGE details which was sent by OS) sgl_ptr->Address = fffffffffffff000 [14547.313240] sgl_ptr->Length = 1000 [14547.313241] sge_count = 18 [14547.313242] cmd->index = 9d9 Note : This issue is observed only when virtualization is enabled Product : Broadcom (LSI) Megaraid H840 controller --- ProblemType: Bug AlsaDevices: total 0 crw-rw----+ 1 root audio 116, 1 Oct 12 16:35 seq crw-rw----+ 1 root audio 116, 33 Oct 12 16:35 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R7415 Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-8-generic root=UUID=43e89410-c7ff-11e8-9229-d094661013d8 ro ProcVersionSignature: Ubuntu 4.18.0-8.9~18.04.1-generic 4.18.7 RelatedPackageVersions: linux-restricted-modules-4.18.0-8-generic N/A linux-backports-modules-4.18.0-8-generic N/A linux-firmware 1.173.1 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic uec-images Uname: Linux 4.18.0-8-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lxd plugdev sudo _MarkForUpload: True dmi.bios.date: 09/07/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.6.2 dmi.board.vendor: Dell Inc. dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.6.2:bd09/07/2018:svnDellInc.:pnPowerEdgeR7415:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct23:cvr: dmi.product.family: PowerEdge dmi.product.name: PowerEdge R7415 dmi.product.sku: SKU=NotProvided;ModelName=PowerEdge R7415 dmi.sys.vendor: Dell Inc. --- ProblemType: Bug AlsaDevices: total 0 crw-rw----+ 1 root audio 116, 1 Oct 12 16:35 seq crw-rw----+ 1 root audio 116, 33 Oct 12 16:35 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R7415 Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-8-generic root=UUID=43e89410-c7ff-11e8-9229-d094661013d8 ro ProcVersionSignature: Ubuntu 4.18.0-8.9~18.04.1-generic 4.18.7 RelatedPackageVersions: linux-restricted-modules-4.18.0-8-generic N/A linux-backports-modules-4.18.0-8-generic N/A linux-firmware 1.173.1 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic uec-images Uname: Linux 4.18.0-8-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lxd plugdev sudo _MarkForUpload: True dmi.bios.date: 09/07/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.6.2 dmi.board.vendor: Dell Inc. dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.6.2:bd09/07/2018:svnDellInc.:pnPowerEdgeR7415:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct23:cvr: dmi.product.family: PowerEdge dmi.product.name: PowerEdge R7415 dmi.product.sku: SKU=NotProvided;ModelName=PowerEdge R7415 dmi.sys.vendor: Dell Inc. --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-09-20 (25 days ago) InstallationMedia: Ubuntu-Server 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) IwConfig: lo no wireless extensions. eno2 no wireless extensions. eno1 no wireless extensions. MachineType: Dell Inc. PowerEdge R7415 Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=0fdc9101-73c3-4eec-9136-4384e760b449 ro ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.15.0-36-generic N/A linux-backports-modules-4.15.0-36-generic N/A linux-firmware 1.173.1 RfKill: Tags: bionic Uname: Linux 4.15.0-36-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: True dmi.bios.date: 09/07/2018 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.6.2 dmi.board.name: 065PKD dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.6.2:bd09/07/2018:svnDellInc.:pnPowerEdgeR7415:pvr:rvnDellInc.:rn065PKD:rvrA00:cvnDellInc.:ct23:cvr: dmi.product.family: PowerEdge dmi.product.name: PowerEdge R7415 dmi.sys.vendor: Dell Inc. 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