[Bug 1690] New: ramdisk leaks memory

bugzilla-daemon at rtems.org bugzilla-daemon at rtems.org
Thu Aug 26 03:43:49 CDT 2010


https://www.rtems.org/bugzilla/show_bug.cgi?id=1690

           Summary: ramdisk leaks memory
           Product: RTEMS
           Version: HEAD
          Platform: All
        OS/Version: RTEMS
            Status: NEW
          Severity: normal
          Priority: P3
         Component: filesystem
        AssignedTo: chrisj at rtems.org
        ReportedBy: ralf.corsepius at rtems.org


In http://scan2.coverity.com:9104/cov.cgi?cid=26

JoelSherrill wrote on 2010-01-19 03:17:

This is allocating memory for a RAM disk which will persist for the life of the
system. RTEMS has no "de-initialize" driver call so there is no corresponding
free(r). 

Later this was closed as "Ignore"/"Intentional"

Though I agree that closing this CID this way is appropriate, 
I think this actually needs fixing in longer term.


Context:
cpukit/libblock/src/ramdisk-config.c:
...
ramdisk_initialize()
...
Event alloc_fn: Calling allocation function "calloc".
Event var_assign: Assigning: "r" =  storage returned from
"calloc(rtems_ramdisk_configuration_size, sizeof (struct ramdisk) /*16*/)".
49           r = calloc(rtems_ramdisk_configuration_size, sizeof(struct
ramdisk));
50           r->trace = false;
...
Event leaked_storage: Variable "r" going out of scope leaks the storage it
points to.
89           return RTEMS_SUCCESSFUL;

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