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| author | Sanidhya Kashyap <sanidhya.gatech@gmail.com> | 2015-09-04 15:44:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-04 16:54:41 -0700 |
| commit | 0f5e7b41f91814447defc34e915fc5d6e52266d9 (patch) | |
| tree | 6c8ec620c09af95dbed7b7ce355b92bbb3a4184a | |
| parent | 807a7907114c7c703017ed7a96477a2eeb0d08e0 (diff) | |
| download | linux-stable-0f5e7b41f91814447defc34e915fc5d6e52266d9.tar.gz linux-stable-0f5e7b41f91814447defc34e915fc5d6e52266d9.tar.bz2 linux-stable-0f5e7b41f91814447defc34e915fc5d6e52266d9.zip | |
ocfs2: trusted xattr missing CAP_SYS_ADMIN check
The trusted extended attributes are only visible to the process which
hvae CAP_SYS_ADMIN capability but the check is missing in ocfs2
xattr_handler trusted list. The check is important because this will be
used for implementing mechanisms in the userspace for which other
ordinary processes should not have access to.
Signed-off-by: Sanidhya Kashyap <sanidhya.gatech@gmail.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Taesoo kim <taesoo@gatech.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/ocfs2/xattr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c index 889f3796a0d7..a24f264b2fc4 100644 --- a/fs/ocfs2/xattr.c +++ b/fs/ocfs2/xattr.c @@ -7334,6 +7334,9 @@ static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; const size_t total_len = prefix_len + name_len + 1; + if (!capable(CAP_SYS_ADMIN)) + return 0; + if (list && total_len <= list_size) { memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); memcpy(list + prefix_len, name, name_len); |