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From Per Ekman <...@pdc.kth.se>
Subject build/9710: Invalid pointer arithmetic in shm.c causes compilation to fail.
Date Mon, 04 Feb 2002 13:45:41 GMT

>Number:         9710
>Category:       build
>Synopsis:       Invalid pointer arithmetic in shm.c causes compilation to fail.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Mon Feb 04 05:50:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     pek@pdc.kth.se
>Release:        2.0.31
>Organization:
apache
>Environment:
Irix 6.5.13f 
MIPSpro Compilers: Version 7.3.1.1m
>Description:
srclib/apr/shmem/unix/shm.c tries to do pointer arithmetic with a pointer to
void which is illegal in ANSI C as far as I can tell.
>How-To-Repeat:

>Fix:
I did this :

--- srclib/apr/shmem/unix/shm.c.orig    Mon Feb  4 14:30:24 2002
+++ srclib/apr/shmem/unix/shm.c Mon Feb  4 14:30:35 2002
@@ -189,7 +189,7 @@ APR_DECLARE(apr_status_t) apr_shm_create
         /* store the real size in the metadata */
         *(apr_size_t*)(new_m->base) = new_m->realsize;
         /* metadata isn't usable */
-        new_m->usable = new_m->base + sizeof(apr_size_t);
+        new_m->usable = (char *)new_m->base + sizeof(apr_size_t);
 
         apr_pool_cleanup_register(new_m->pool, new_m, shm_cleanup_owner,
                                   apr_pool_cleanup_null);
>Release-Note:
>Audit-Trail:
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