Originally vfs_getxattr would pull the security xattr variable using the inode getxattr handle and then proceed to clobber it with a subsequent call to the LSM. This patch reorders the two operations such that when the xattr requested is in the security namespace it first attempts to grab the value from the LSM directly. If it fails to obtain the value because there is no module present or the module does not support the operation it will fall back to using the inode getxattr operation. In the event that both are inaccessible it returns EOPNOTSUPP.
Signed-off-by: David P. Quigley <[EMAIL PROTECTED]> --- fs/xattr.c | 15 ++++++++------- 1 files changed, 8 insertions(+), 7 deletions(-) diff --git a/fs/xattr.c b/fs/xattr.c index d45c7ef..e5e7fb8 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -141,11 +141,6 @@ vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size) if (error) return error; - if (inode->i_op->getxattr) - error = inode->i_op->getxattr(dentry, name, value, size); - else - error = -EOPNOTSUPP; - if (!strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN)) { const char *suffix = name + XATTR_SECURITY_PREFIX_LEN; @@ -154,9 +149,15 @@ vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size) * Only overwrite the return value if a security module * is actually active. */ - if (ret != -EOPNOTSUPP) - error = ret; + if (ret == -EOPNOTSUPP) + goto nolsm; + return ret; } +nolsm: + if (inode->i_op->getxattr) + error = inode->i_op->getxattr(dentry, name, value, size); + else + error = -EOPNOTSUPP; return error; } - To unsubscribe from this list: send the line "unsubscribe linux-security-module" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html