From: Juergen Gross <jgross@suse.com>
Date: Wed, 13 Dec 2023 09:49:06 +0000 (+0100)
Subject: Mini-OS: use BUG() instead of dereferencing NULL
X-Git-Tag: xen-4.19.0-rc4~8
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=23247d6586110ec3d73cae8a693c0db879a58184;p=mini-os.git

Mini-OS: use BUG() instead of dereferencing NULL

There are some places using a dereference of NULL to cause a crash.

Use BUG() instead.

Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
---

diff --git a/lib/xmalloc.c b/lib/xmalloc.c
index cc5db11..2aa0713 100644
--- a/lib/xmalloc.c
+++ b/lib/xmalloc.c
@@ -219,7 +219,7 @@ void xfree(const void *p)
     if(((long)p & PAGE_MASK) != ((long)hdr & PAGE_MASK))
     {
         printk("Header should be on the same page\n");
-        *(int*)0=0;
+        BUG();
     }
 
     /* Merge with other free block, or put in list. */
@@ -255,7 +255,7 @@ void xfree(const void *p)
         if((((unsigned long)hdr) & (PAGE_SIZE-1)) != 0)
         {
             printk("Bug\n");
-            *(int*)0=0;
+            BUG();
         }
         free_page(hdr);
     }