[bug #30528] Segfault in linevector_free()

[Petr Pisar]

URL:
  <http://savannah.nongnu.org/bugs/?30528>

                 Summary: Segfault in linevector_free()
                 Project: Concurrent Versions System
            Submitted by: petrp
            Submitted on: Fri 23 Jul 2010 11:55:48 AM GMT
                Category: Bug Report
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
                 Release: 
         Discussion Lock: Any
           Fixed Release: None
   Fixed Feature Release: None

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Details:

Package: cvs-1.11.23-8.fc13
Architecture: x86_64
OS Release: Fedora release 13 (Goddard)

cvs update: Updating common/v
P common/v/latch_test_ctrl.v
cvs update: checksum failure after patch to common/v/latch_test_ctrl.v; will
refetch
P common/v/test_ctrl.v
cvs update: checksum failure after patch to common/v/test_ctrl.v; will
refetch
P common/v/test_ctrl_n.v
Segmentation fault (core dumped)    


According back trace, it crashed in linevector_free() called from
apply_rcs_changes() operating on local temporary lines structure while
dereferrencing vec->vector[ln]:

/* Free storage associated with linevector.  */
static void
linevector_free (vec)
    struct linevector *vec;
{
    unsigned int ln;

    if (vec->vector != NULL)
    {
        for (ln = 0; ln < vec->nlines; ++ln)
→           if (vec->vector[ln] && --vec->vector[ln]->refcount == 0)
                                     ^^^^^^^^^^^^^^^^^
                free (vec->vector[ln]);

        free (vec->vector);
    }
}


This bug has been reported to Fedora bug tracking system originally:
https://bugzilla.redhat.com/show_bug.cgi?id=617037



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File Attachments:


-------------------------------------------------------
Date: Fri 23 Jul 2010 11:55:48 AM GMT  Name: backtrace  Size: 10kB   By:
petrp
Back trace
<http://savannah.nongnu.org/bugs/download.php?file_id=21038>

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