LU-12212 mdt: fix SECCTX reply buffer handling

[fs/lustre-release.git] / lustre / mdt / mdt_lib.c

diff --git a/lustre/mdt/mdt_lib.c b/lustre/mdt/mdt_lib.c
index b6619fd..a7d5130 100644 (file)
--- a/lustre/mdt/mdt_lib.c
+++ b/lustre/mdt/mdt_lib.c
@@ -790,6 +790,12 @@ int mdt_fix_reply(struct mdt_thread_info *info)
                req_capsule_shrink(pill, &RMF_LOGCOOKIES, acl_size, RCL_SERVER);
        }
 
+       /* Shrink optional SECCTX buffer if it is not used */
+       if (req_capsule_has_field(pill, &RMF_FILE_SECCTX, RCL_SERVER) &&
+           req_capsule_get_size(pill, &RMF_FILE_SECCTX, RCL_SERVER) != 0 &&
+           !(body->mbo_valid & OBD_MD_SECCTX))
+               req_capsule_shrink(pill, &RMF_FILE_SECCTX, 0, RCL_SERVER);
+
        /*
         * Some more field should be shrinked if needed.
         * This should be done by those who added fields to reply message.