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* rootless: detect when user namespaces are not enabledGiuseppe Scrivano2018-10-11
| | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* rootless: report more error messages from the startup phaseGiuseppe Scrivano2018-10-11
| | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* rootless: fix an hang on older versions of setresuid/setresgidGiuseppe Scrivano2018-10-11
| | | | | | | | | | | | | | | | the issue is caused by the Go Runtime that messes up with the process signals, overriding SIGSETXID and SIGCANCEL which are used internally by glibc. They are used to inform all the threads to update their stored uid/gid information. This causes a hang on the set*id glibc wrappers since the handler installed by glibc is never invoked. Since we are running with only one thread, we don't really need to update other threads or even the current thread as we are not using getuid/getgid before the execvp. Closes: https://github.com/containers/libpod/issues/1625 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* rootless: error out if there are not enough UIDs/GIDs availableGiuseppe Scrivano2018-09-21
| | | | | | | | | | | Most container images assume there are at least 65536 UIDs/GIDs available. Raise an error if there are not enough IDs allocated to the current user. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1520 Approved by: rhatdan
* rootless: skip usage of filepath.JoinGiuseppe Scrivano2018-09-21
| | | | | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1507 Approved by: rhatdan
* create, rootless: join the userns of ns:PATHGiuseppe Scrivano2018-09-21
| | | | | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1507 Approved by: rhatdan
* rootless: check uid with Geteuid() instead of Getuid()Giuseppe Scrivano2018-09-04
| | | | | | | | | | | | change the tests to use chroot to set a numeric UID/GID. Go syscall.Credential doesn't change the effective UID/GID of the process. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1372 Approved by: mheon
* rootless: unexport GetUserNSForPidGiuseppe Scrivano2018-08-29
| | | | | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1371 Approved by: rhatdan
* rootless: add new function to join existing namespaceGiuseppe Scrivano2018-08-29
| | | | | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1371 Approved by: rhatdan
* rootless: exec handle processes that create an user namespaceGiuseppe Scrivano2018-08-26
| | | | | | | | | | | | | | Manage the case where the main process of the container creates and joins a new user namespace. In this case we want to join only the first child in the new hierarchy, which is the user namespace that was used to create the container. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1331 Approved by: rhatdan
* rootless: fix execGiuseppe Scrivano2018-08-26
| | | | | | | | | | | | | | | | | | | | | We cannot re-exec into a new user namespace to gain privileges and access an existing as the new namespace is not the owner of the existing container. "unshare" is used to join the user namespace of the target container. The current implementation assumes that the main process of the container didn't create a new user namespace. Since in the setup phase we are not running with euid=0, we must skip the setup for containers/storage. Closes: https://github.com/containers/libpod/issues/1329 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1331 Approved by: rhatdan
* rootless: fix user lookup if USER= is not setGiuseppe Scrivano2018-08-08
| | | | | | | | | | | | Lookup the current username by UID if the USER env variable is not set. Reported in: https://github.com/projectatomic/libpod/issues/1092 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1217 Approved by: rhatdan
* Check for missing arguments in /proc/self/cmdlineAnders F Björklund2018-08-03
| | | | | Closes: #1206 Approved by: giuseppe
* rootless: do not set setgroups to deny when using newuidmapGiuseppe Scrivano2018-08-02
| | | | | | | | | It is required only when directly configuring the user namespace. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1200 Approved by: rhatdan
* rootless: do not segfault if the parent already diedGiuseppe Scrivano2018-08-02
| | | | | | Closes: https://github.com/projectatomic/libpod/issues/1189 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* rootless: require subids to be presentGiuseppe Scrivano2018-07-16
| | | | | | | | | | | | | | | | | | Most images won't work without multiple ids/gids. Error out immediately if there are no multiple ids available. The error code when the user is not present in /etc/sub{g,u}id looks like: $ bin/podman run --rm -ti alpine echo hello ERRO[0000] No subuid ranges found for user "gscrivano" Closes: https://github.com/projectatomic/libpod/issues/1087 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1097 Approved by: rhatdan
* Merge pull request #1091 from giuseppe/rootless-unshare-mount-nsDaniel J Walsh2018-07-13
|\ | | | | rootless: unshare mount namespace
| * rootless: unshare mount namespaceGiuseppe Scrivano2018-07-13
| | | | | | | | | | | | | | | | | | | | | | unshare the mount namespace as well when creating an user namespace so that we are the owner of the mount namespace and we can mount FUSE file systems on Linux 4.18. Tested on Fedora Rawhide: podman --storage-opt overlay.fuse_program=/usr/bin/fuse-overlayfs run alpine echo hello hello Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* | rootless: correctly propagate the exit status from the containerGiuseppe Scrivano2018-07-13
|/ | | | Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* rootless: fix when argv[0] is not an absolute pathGiuseppe Scrivano2018-07-10
| | | | | | | | | | | | use execvp instead of exec so that we keep the PATH environment variable and the lookup for the "podman" executable works. Closes: https://github.com/projectatomic/libpod/issues/1070 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1072 Approved by: mheon
* rootless: Merge rootless.go back into rootless_linux.goW. Trevor King2018-07-06
| | | | | | | | | | | | | | | The files were split apart by b96be3af (changes to allow for darwin compilation, 2018-06-20, #1015), but the C import and two functions left in rootless.go are all Linux-specific as well. This commit moves all of the pre-b96be3af rootless.go into rootless_linux.go, just adding the '// +build linux' header (b96be3af also scrambled the + in that header) and keeping the new GetRootlessUID from a1545fe6 (rootless: add function to retrieve the original UID, 2018-07-05, #1048). Signed-off-by: W. Trevor King <wking@tremily.us> Closes: #1034 Approved by: baude
* more changes to compile darwinbaude2018-07-05
| | | | | | | | | | | | | | | | this should represent the last major changes to get darwin to **compile**. again, the purpose here is to get darwin to compile so that we can eventually implement a ci task that would protect against regressions for darwin compilation. i have left the manual darwin compilation largely static still and in fact now only interject (manually) two build tags to assist with the build. trevor king has great ideas on how to make this better and i will defer final implementation of those to him. Signed-off-by: baude <bbaude@redhat.com> Closes: #1047 Approved by: rhatdan
* rootless: add function to retrieve the original UIDGiuseppe Scrivano2018-07-05
| | | | | | | | | | After we re-exec in the userNS os.Getuid() returns the new UID (= 0) which is not what we want to use. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1048 Approved by: mheon
* changes to allow for darwin compilationbaude2018-06-29
| | | | | | | Signed-off-by: baude <bbaude@redhat.com> Closes: #1015 Approved by: baude
* rootless: do not configure additional groupsGiuseppe Scrivano2018-06-27
| | | | | | | | | Additional groups are not allowed in an userNS. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #936 Approved by: rhatdan
* rootless: add management for the userNSGiuseppe Scrivano2018-06-27
When running podman as non root user always create an userNS and let the OCI runtime use it. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #936 Approved by: rhatdan
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