Messages in this thread Patch in this message | | | From | Andreas Gruenbacher <> | Subject | [PATCH] vfs: Check attribute names in posix acl xattr handers | Date | Thu, 8 Oct 2015 17:33:23 +0200 |
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The get and set operations of the posix acl xattr handlers failed to check the attribute names, so all names with "system.posix_acl_access" or "system.posix_acl_default" as a prefix were accepted. Reject invalid names from now on.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/posix_acl.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 4fb17de..b1a66e8 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -768,6 +768,8 @@ posix_acl_xattr_get(struct dentry *dentry, const char *name, struct posix_acl *acl; int error; + if (strcmp(name, "") != 0) + return -EINVAL; if (!IS_POSIXACL(d_backing_inode(dentry))) return -EOPNOTSUPP; if (d_is_symlink(dentry)) @@ -793,6 +795,8 @@ posix_acl_xattr_set(struct dentry *dentry, const char *name, struct posix_acl *acl = NULL; int ret; + if (strcmp(name, "") != 0) + return -EINVAL; if (!IS_POSIXACL(inode)) return -EOPNOTSUPP; if (!inode->i_op->set_acl) -- 2.5.0
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