butm/file_tm.c: check for null pointer before dereferencing

[openafs.git] / src / butm / file_tm.c

diff --git a/src/butm/file_tm.c b/src/butm/file_tm.c
index 73f7adc..d53dd4c 100644 (file)
--- a/src/butm/file_tm.c
+++ b/src/butm/file_tm.c
@@ -991,14 +991,15 @@ file_Mount(struct butm_tapeInfo *info, char *tape)
     int xflags;
     afs_int32 code = 0, error = 0, rc = 0;
 
+    if (!info || !tape)
+       ERROR_EXIT(BUTM_BADARGUMENT);
+
     if (info->debug)
        printf("butm: Mount tape drive\n");
 
     POLL();
     info->error = 0;
 
-    if (!info || !tape)
-       ERROR_EXIT(BUTM_BADARGUMENT);
     if (info->structVersion != BUTM_MAJORVERSION)
        ERROR_EXIT(BUTM_OLDINTERFACE);
     if (info->tmRock)