1 files changed, 19 insertions, 6 deletions

diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 64601146f157..ad2538a64c70 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -29,6 +29,9 @@
 #include "smberr.h"
 #include "nterr.h"
 #include "cifs_unicode.h"
+#ifdef CONFIG_CIFS_SMB2
+#include "smb2pdu.h"
+#endif
 
 extern mempool_t *cifs_sm_req_poolp;
 extern mempool_t *cifs_req_poolp;
@@ -143,17 +146,27 @@ struct smb_hdr *
 cifs_buf_get(void)
 {
         struct smb_hdr *ret_buf = NULL;
-
-/* We could use negotiated size instead of max_msgsize -
-   but it may be more efficient to always alloc same size
-   albeit slightly larger than necessary and maxbuffersize
-   defaults to this and can not be bigger */
+        size_t buf_size = sizeof(struct smb_hdr);
+
+#ifdef CONFIG_CIFS_SMB2
+        /*
+         * SMB2 header is bigger than CIFS one - no problems to clean some
+         * more bytes for CIFS.
+         */
+        buf_size = sizeof(struct smb2_hdr);
+#endif
+        /*
+         * We could use negotiated size instead of max_msgsize -
+         * but it may be more efficient to always alloc same size
+         * albeit slightly larger than necessary and maxbuffersize
+         * defaults to this and can not be bigger.
+         */
         ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS);
 
         /* clear the first few header bytes */
         /* for most paths, more is cleared in header_assemble */
         if (ret_buf) {
-                memset(ret_buf, 0, sizeof(struct smb_hdr) + 3);
+                memset(ret_buf, 0, buf_size + 3);
                 atomic_inc(&bufAllocCount);
 #ifdef CONFIG_CIFS_STATS2
                 atomic_inc(&totBufAllocCount);