[CIFS] Add null malloc response check in notify experimental code

Signed-off-by: Steve French (sfrench@us.ibm.com)

1 files changed, 19 insertions, 13 deletions

diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 41996a240149..9312bfc56682 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -4294,20 +4294,26 @@ int CIFSSMBNotify(const int xid, struct cifsTconInfo *tcon,
                 cFYI(1, ("Error in Notify = %d", rc));
         } else {
                 /* Add file to outstanding requests */
+                /* BB change to kmem cache alloc */     
                 dnotify_req = (struct dir_notify_req *) kmalloc(
-                                                sizeof(struct dir_notify_req), GFP_KERNEL);
-                dnotify_req->Pid = pSMB->hdr.Pid;
-                dnotify_req->PidHigh = pSMB->hdr.PidHigh;
-                dnotify_req->Mid = pSMB->hdr.Mid;
-                dnotify_req->Tid = pSMB->hdr.Tid;
-                dnotify_req->Uid = pSMB->hdr.Uid;
-                dnotify_req->netfid = netfid;
-                dnotify_req->pfile = pfile;
-                dnotify_req->filter = filter;
-                dnotify_req->multishot = multishot;
-                spin_lock(&GlobalMid_Lock);
-                list_add_tail(&dnotify_req->lhead, &GlobalDnotifyReqList);
-                spin_unlock(&GlobalMid_Lock);
+                                                sizeof(struct dir_notify_req),
+                                                 GFP_KERNEL);
+                if(dnotify_req) {
+                        dnotify_req->Pid = pSMB->hdr.Pid;
+                        dnotify_req->PidHigh = pSMB->hdr.PidHigh;
+                        dnotify_req->Mid = pSMB->hdr.Mid;
+                        dnotify_req->Tid = pSMB->hdr.Tid;
+                        dnotify_req->Uid = pSMB->hdr.Uid;
+                        dnotify_req->netfid = netfid;
+                        dnotify_req->pfile = pfile;
+                        dnotify_req->filter = filter;
+                        dnotify_req->multishot = multishot;
+                        spin_lock(&GlobalMid_Lock);
+                        list_add_tail(&dnotify_req->lhead, 
+                                        &GlobalDnotifyReqList);
+                        spin_unlock(&GlobalMid_Lock);
+                } else 
+                        rc = -ENOMEM;
         }
         cifs_buf_release(pSMB);
         return rc;