[
https://issues.apache.org/jira/browse/HDFS-4765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jason Lowe updated HDFS-4765:
-----------------------------
Attachment: hdfs-4765-branch-0.23.patch
Patch for branch-0.23
> Permission check of symlink deletion incorrectly throws
> UnresolvedLinkException
> -------------------------------------------------------------------------------
>
> Key: HDFS-4765
> URL: https://issues.apache.org/jira/browse/HDFS-4765
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.0.0, 2.0.3-alpha
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Fix For: 2.1.0-beta
>
> Attachments: hdfs-4765-1.patch, hdfs-4765-2.patch,
> hdfs-4765-branch-0.23.patch, hdfs-4765-branch-2-1.patch
>
>
> With permissions enabled, the permission check in {{FSNamesystem#delete}}
> will incorrectly throw an UnresolvedLinkException if the path contains a
> symlink. This leads to FileContext resolving the symlink and instead deleting
> the link target.
> The correct check is to see if the user has write permissions on the parent
> directory of the symlink, e.g.
> {noformat}
> -> % ls -ld symtest
> drwxr-xr-x 2 root root 4096 Apr 26 14:12 symtest
> -> % ls -l symtest
> total 12
> lrwxrwxrwx 1 root root 6 Apr 26 14:12 link -> target
> -rw-r--r-- 1 root root 0 Apr 26 14:11 target
> -> % rm -f symtest/link
> rm: cannot remove `symtest/link': Permission denied
> -> % sudo chown andrew symtest
> -> % rm -f symtest/link
> -> %
> {noformat}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
