cifs: fix a possible null pointer deref in decode_ascii_ssetup

When kzalloc fails, we will end up doing NULL pointer derefrence

Signed-off-by Namjae Jeon <[email protected]>

Signed-off-by Ashish Sangwan <[email protected]>

---
 fs/cifs/sess.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

fs/cifs/sess.c +4 -4

index 39b8507..07fe97a 100644
@@ -243,10 +243,11 @@ static void decode_ascii_ssetup(char **pbcc_area, __u16 bleft,
        kfree(ses->serverOS);
 
        ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
-       if (ses->serverOS)
+       if (ses->serverOS) {
                strncpy(ses->serverOS, bcc_ptr, len);
-       if (strncmp(ses->serverOS, "OS/2", 4) == 0)
-               cifs_dbg(FYI, "OS/2 server\n");
+               if (strncmp(ses->serverOS, "OS/2", 4) == 0)
+                       cifs_dbg(FYI, "OS/2 server\n");
+       }
 
        bcc_ptr += len + 1;
        bleft -= len + 1;
--

1.7.7