Bug 1127357
| Summary: | Docker image is not able to patch file on host system | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Eric Rich <erich> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.0 | CC: | dwalsh, erich, mmalik |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | selinux-policy-3.13.1-1.el7 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-03-05 10:42:32 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1064025 | ||
In your container what does "id -Z" say? Does it show SELinux as disabled? $ docker run -t -i -u nobody --rm -v $HOME/dockerplay/:/mnt rhel7 /bin/bash bash-4.2$ id -Z id: --context (-Z) works only on an SELinux-enabled kernel bash-4.2$ exit $ docker run -t -i -u nobody --rm --privileged -v $HOME/dockerplay/:/mnt rhel7 /bin/bash bash-4.2$ id -Z id: --context (-Z) works only on an SELinux-enabled kernel bash-4.2$ exit exit $ getenforce Enforcing ^^ from the host. eb488fe790bcd3394c317c88d990ba54510617dc fixes this in git. Have no idea why it is doing it, but I have no problem allowing it. Needs back port to F20, F21 and RHEL7 Milos what version of docker? # rpm -qa docker\* docker-1.4.1-1.el7.x86_64 # Going to test it with the latest one. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-0458.html Well it is walking the file system and changing the context. Hopefully it is comparable to chcon -R -t svirt_sandbox_file_t /mount/pint |
Description of problem: I am not able to get a docker container to patch a file on a mounted directory. How reproducible: Very Steps to Reproduce: - Note: Use a non-root / system user that is a member of the docker group. $ mkdir dockerplay $ echo "Test" > dockerplay/file $ cp dockerplay/file dockerplay/file.change $ echo "Test2" >> dockerplay/file.change $ diff -u dockerplay/file dockerplay/file.change > dockerplay/file.patch $ echo -e "FROM redhat/rhel7:0\nRUN yum install -y patch strace && yum clean all" > Dockerfile $ docker build -t broker_patch dockerplay/ ** Become root # chown -R nobody:nobody dockerplay # chcon -Rt svirt_sandbox_file_t dockerplay/ # ls -laZ dockerplay/ drwxrwxr-x. nobody nobody unconfined_u:object_r:svirt_sandbox_file_t:s0 . drwx------. developer developer unconfined_u:object_r:user_home_dir_t:s0 .. -rw-rw-r--. nobody nobody unconfined_u:object_r:svirt_sandbox_file_t:s0 Dockerfile -rw-rw-r--. nobody nobody unconfined_u:object_r:svirt_sandbox_file_t:s0 file -rw-rw-r--. nobody nobody unconfined_u:object_r:svirt_sandbox_file_t:s0 file.change -rw-rw-r--. nobody nobody unconfined_u:object_r:svirt_sandbox_file_t:s0 file.patch $ docker run -t -i -u nobody --rm -v $(pwd)/dockerplay:/mnt broker_patch /bin/bash bash-4.2$ cd /mnt bash-4.2$ patch -p0 -s < file.patch The text leading up to this was: -------------------------- |--- dockerplay/file 2014-08-06 13:16:51.030000000 -0400 |+++ dockerplay/file.change 2014-08-06 13:17:20.413000000 -0400 -------------------------- File to patch: file Actual results: patch: setting attribute security.selinux for security.selinux: Permission denied -- Audit Logs from Reproducer -- type=SYSCALL msg=audit(1407346081.674:11863): arch=c000003e syscall=16 success=yes exit=0 a0=11 a1=89a2 a2=c21108be80 a3=0 items=0 ppid=1 pid=23487 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="docker" exe="/usr/bin/docker" subj=system_u:system_r:docker_t:s0 key=(null) type=AVC msg=audit(1407346131.288:11864): avc: denied { relabelfrom } for pid=28769 comm="patch" name="file.otXlBVt" dev="dm-0" ino=1188044 scontext=system_u:system_r:svirt_lxc_net_t:s0:c162,c955 tcontext=system_u:object_r:svirt_sandbox_file_t:s0 tclass=file type=SYSCALL msg=audit(1407346131.288:11864): arch=c000003e syscall=189 success=no exit=-13 a0=ac9c10 a1=7fff3c25a530 a2=ac9c60 a3=2e items=0 ppid=1 pid=28769 auid=4294967295 uid=99 gid=99 euid=99 suid=99 fsuid=99 egid=99 sgid=99 fsgid=99 tty=pts1 ses=4294967295 comm="patch" exe="/usr/bin/patch" subj=system_u:system_r:svirt_lxc_net_t:s0:c162,c955 key=(null) type=AVC msg=audit(1407346143.263:11865): avc: denied { relabelfrom } for pid=28771 comm="patch" name="file.oWIbRuu" dev="dm-0" ino=1188044 scontext=system_u:system_r:svirt_lxc_net_t:s0:c162,c955 tcontext=system_u:object_r:svirt_sandbox_file_t:s0 tclass=file type=SYSCALL msg=audit(1407346143.263:11865): arch=c000003e syscall=189 success=no exit=-13 a0=1aa0c10 a1=7ffffbf0f940 a2=1aa0c60 a3=2e items=0 ppid=1 pid=28771 auid=4294967295 uid=99 gid=99 euid=99 suid=99 fsuid=99 egid=99 sgid=99 fsgid=99 tty=pts1 ses=4294967295 comm="patch" exe="/usr/bin/patch" subj=system_u:system_r:svirt_lxc_net_t:s0:c162,c955 key=(null) Expected results: bash-4.2$ cd /mnt bash-4.2$ patch -p0 -s < file.patch The text leading up to this was: -------------------------- |--- dockerplay/file 2014-08-06 13:16:51.030000000 -0400 |+++ dockerplay/file.change 2014-08-06 13:17:20.413000000 -0400 -------------------------- File to patch: file -- Audit Logs from Reproducer -- type=SYSCALL msg=audit(1407346644.795:11888): arch=c000003e syscall=56 success=yes exit=28903 a0=6c020011 a1=0 a2=0 a3=0 items=0 ppid=1 pid=23672 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="docker" exe="/usr/bin/docker" subj=system_u:system_r:docker_t:s0 key=(null) type=ANOM_PROMISCUOUS msg=audit(1407346644.911:11889): dev=vethae69 prom=256 old_prom=0 auid=4294967295 uid=0 gid=0 ses=4294967295 type=SYSCALL msg=audit(1407346644.911:11889): arch=c000003e syscall=16 success=yes exit=0 a0=11 a1=89a2 a2=c21047c7e0 a3=0 items=0 ppid=1 pid=23487 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="docker" exe="/usr/bin/docker" subj=system_u:system_r:docker_t:s0 key=(null) type=ANOM_PROMISCUOUS msg=audit(1407346677.146:11890): dev=vethae69 prom=0 old_prom=256 auid=4294967295 uid=0 gid=0 ses=4294967295 Additional info: Running as a privileged use works! $ docker run -t -i -u nobody --rm --privileged -v $(pwd)/dockerplay:/mnt broker_patch /bin/bash