LU-10582 out: can't obtain remote acl xattr

[fs/lustre-release.git] / lustre / mdd / mdd_permission.c

diff --git a/lustre/mdd/mdd_permission.c b/lustre/mdd/mdd_permission.c
index 505fb31..0065a61 100644 (file)
--- a/lustre/mdd/mdd_permission.c
+++ b/lustre/mdd/mdd_permission.c
@@ -62,8 +62,15 @@ int mdd_acl_chmod(const struct lu_env *env, struct mdd_object *o, __u32 mode,
        ENTRY;
 
        lu_buf_check_and_alloc(&mdd_env_info(env)->mti_xattr_buf,
-                       mdd_obj2mdd_dev(o)->mdd_dt_conf.ddp_max_ea_size);
+                       MIN(mdd_obj2mdd_dev(o)->mdd_dt_conf.ddp_max_ea_size,
+                           XATTR_SIZE_MAX));
        buf = mdd_env_info(env)->mti_xattr_buf;
+       if (buf.lb_buf == NULL)
+               RETURN(-ENOMEM);
+
+       if (buf.lb_len > XATTR_SIZE_MAX)
+               buf.lb_len  = XATTR_SIZE_MAX;
+
        rc = mdo_xattr_get(env, o, &buf, XATTR_NAME_ACL_ACCESS);
        if ((rc == -EOPNOTSUPP) || (rc == -ENODATA))
                RETURN(0);
@@ -210,8 +217,15 @@ static int mdd_check_acl(const struct lu_env *env, struct mdd_object *obj,
        ENTRY;
 
        lu_buf_check_and_alloc(&mdd_env_info(env)->mti_xattr_buf,
-                       mdd_obj2mdd_dev(obj)->mdd_dt_conf.ddp_max_ea_size);
+                       MIN(mdd_obj2mdd_dev(obj)->mdd_dt_conf.ddp_max_ea_size,
+                           XATTR_SIZE_MAX));
        buf = mdd_env_info(env)->mti_xattr_buf;
+       if (buf.lb_buf == NULL)
+               RETURN(-ENOMEM);
+
+       if (buf.lb_len > XATTR_SIZE_MAX)
+               buf.lb_len  = XATTR_SIZE_MAX;
+
        rc = mdo_xattr_get(env, obj, &buf, XATTR_NAME_ACL_ACCESS);
        if (rc <= 0)
                RETURN(rc ? : -EACCES);