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authorSanidhya Kashyap <sanidhya.gatech@gmail.com>2015-09-05 01:44:08 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-05 02:54:41 +0300
commit0f5e7b41f91814447defc34e915fc5d6e52266d9 (patch)
tree6c8ec620c09af95dbed7b7ce355b92bbb3a4184a /fs/ocfs2/xattr.c
parent807a7907114c7c703017ed7a96477a2eeb0d08e0 (diff)
downloadlinux-0f5e7b41f91814447defc34e915fc5d6e52266d9.tar.xz
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>
Diffstat (limited to 'fs/ocfs2/xattr.c')
-rw-r--r--fs/ocfs2/xattr.c3
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);