Messages in this thread Patch in this message | | | From | Andreas Gruenbacher <> | Subject | [PATCH v2 3/7] jffs2: Add missing capability check for listing trusted xattrs | Date | Tue, 22 Sep 2015 14:26:48 +0200 |
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The vfs checks if a task has the appropriate access for get and set operations, but it cannot do that for the list operation; the file system must check for that itself.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/jffs2/xattr_trusted.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/jffs2/xattr_trusted.c b/fs/jffs2/xattr_trusted.c index ceaf9c6..bbd20c1 100644 --- a/fs/jffs2/xattr_trusted.c +++ b/fs/jffs2/xattr_trusted.c @@ -39,6 +39,9 @@ static size_t jffs2_trusted_listxattr(struct dentry *dentry, char *list, { size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1; + if (!capable(CAP_SYS_ADMIN)) + return 0; + if (list && retlen<=list_size) { strcpy(list, XATTR_TRUSTED_PREFIX); strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name); -- 2.4.3
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