From bf781714b3e1421a0ebcd0137d081e6566a89f15 Mon Sep 17 00:00:00 2001 From: Andreas Gruenbacher <agruenba@redhat.com> Date: Sun, 4 Oct 2015 19:18:50 +0200 Subject: [PATCH] jffs2: Add missing capability check for listing trusted xattrs 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> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: linux-mtd@lists.infradead.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- 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 ceaf9c693225..bbd20c16090e 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); -- 2.30.2