CIFS: Respect SMB2 header/max header size
Use SMB2 header size values for allocation and memset because they
are bigger and suitable for both CIFS and SMB2.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 2e9929d..7a7cda9 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -48,6 +48,9 @@
#include <linux/key-type.h>
#include "cifs_spnego.h"
#include "fscache.h"
+#ifdef CONFIG_CIFS_SMB2
+#include "smb2pdu.h"
+#endif
#define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */
int cifsFYI = 0;
@@ -980,6 +983,14 @@
static int
cifs_init_request_bufs(void)
{
+ size_t max_hdr_size = MAX_CIFS_HDR_SIZE;
+#ifdef CONFIG_CIFS_SMB2
+ /*
+ * SMB2 maximum header size is bigger than CIFS one - no problems to
+ * allocate some more bytes for CIFS.
+ */
+ max_hdr_size = MAX_SMB2_HDR_SIZE;
+#endif
if (CIFSMaxBufSize < 8192) {
/* Buffer size can not be smaller than 2 * PATH_MAX since maximum
Unicode path name has to fit in any SMB/CIFS path based frames */
@@ -991,8 +1002,7 @@
}
/* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */
cifs_req_cachep = kmem_cache_create("cifs_request",
- CIFSMaxBufSize +
- MAX_CIFS_HDR_SIZE, 0,
+ CIFSMaxBufSize + max_hdr_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
if (cifs_req_cachep == NULL)
return -ENOMEM;