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 <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: Steve French <smfrench@gmail.com>

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 39ee326..3a5e833 100644 (file)
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -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;