I have not had a chance to try and reproduce the issue with the example mentioned in this bug report but I have been able to verify that the kernel in bionic-proposed fixes the problem I have reported in the following bug report that has been rightfully marked as a duplicate:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813179 Steps I took to install the bionic-porposed kernel: sudo apt-get install software-properties-common sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu/ $(lsb_release -sc)-proposed restricted main universe" sudo apt -y update sudo apt-get -t bionic-proposed install linux-generic # Reboot After reboot: cpriebe@x:~$ uname -a Linux x 4.15.0-46-generic #49-Ubuntu SMP Wed Feb 6 09:33:07 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux cpriebe@x:~$ sudo apt-cache policy linux-generic linux-generic: Installed: 4.15.0.46.48 Candidate: 4.15.0.46.48 Version table: *** 4.15.0.46.48 500 500 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages 100 /var/lib/dpkg/status Considering the other bug has been marked as a duplicate I assume it is okay for me to change the tag on this. If this is not okay, please let me know and/or change it back. ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- 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/1799237 Title: mprotect fails on ext4 with dax Status in Ubuntu: Invalid Status in linux package in Ubuntu: Invalid Status in pmdk package in Ubuntu: Invalid Status in linux source package in Bionic: Fix Committed Bug description: I have a file located on ext4 mounted with "dax". When I call mmap on that file with protection flag different than PROT_NONE and pass the returned address to mprotect(..., PROT_NONE) it fails with: mprotect: Permission denied This bug affects PMDK (https://github.com/pmem/pmdk) and seems to be Ubuntu kernel-specific. Problem was observer on kernel 4.15.0-36-generic and 4.15.0-34-generic Below is a code which can be used to reproduce the issue. #include <sys/stat.h> #include <sys/types.h> #include <sys/mman.h> #include <stdlib.h> #include <stdio.h> #include <fcntl.h> int main(int argc, char *argv[]) { if (argc < 3) { fprintf(stderr, "usage %s file size\n", argv[0]); return 1; } int size = atoi(argv[2]); int fd = open(argv[1], O_RDWR); if (fd < 0) { perror("open"); return 1; } void *addr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (addr == MAP_FAILED) { perror("mmap"); return 1; } if(mprotect(addr, size, PROT_NONE)) { perror("mprotect"); return 1; } return 0; } --- 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: CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-10-23 (0 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) IwConfig: lo no wireless extensions. enp0s3 no wireless extensions. Lsusb: Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox Package: linux (not installed) ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-36-generic root=UUID=48e87c4c-3028-4252-b7bb-e1e6091ff7f6 ro quiet splash ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18 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: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.family: Virtual Machine dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1799237/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
