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Posted to bugs@httpd.apache.org by bu...@apache.org on 2012/08/06 21:31:10 UTC

[Bug 53663] New: Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd

https://issues.apache.org/bugzilla/show_bug.cgi?id=53663

          Priority: P2
            Bug ID: 53663
          Assignee: bugs@httpd.apache.org
           Summary: Use of uninitialized memory in mod_rewrite, when
                    RewriteMap is dbd or fastdbd
          Severity: major
    Classification: Unclassified
                OS: All
          Reporter: mi+apache@aldan.algebra.com
          Hardware: All
            Status: NEW
           Version: 2.4.2
         Component: mod_rewrite
           Product: Apache httpd-2

Created attachment 29173
  --> https://issues.apache.org/bugzilla/attachment.cgi?id=29173&action=edit
Fix for mod_rewrite's dbd/fastdbd initialization

Without the attached patch, httpd randomly crashes at startup, when one
attempts to use the new dbd-style RewriteMap.

valgrind points at the use of uninitialized memory in mod_rewrite.c:3068 --
indeed, when the map is of type dbd (or fastdbd), the newmap->checkfile remains
uninitialized. The proposed patch fixes the problem by explicitly setting the
field to NULL (there are no files to check in this case).

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[Bug 53663] Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=53663

Stefan Fritsch <sf...@sfritsch.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |FixedInTrunk

--- Comment #1 from Stefan Fritsch <sf...@sfritsch.de> ---
Thanks for debugging this.

Fixed slightly differently in r1369995, r1369999, r1370001.

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[Bug 53663] Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=53663

Rainer Jung <ra...@kippdata.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Rainer Jung <ra...@kippdata.de> ---
Fixed for 2.4 in r1371208.
Released with 2.4.3.
It seems no backport needed, since rewrite maps with dbd did not exist in 2.2.

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[Bug 53663] Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=53663

Mikhail T. <mi...@aldan.algebra.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |PatchAvailable

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[Bug 53663] Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd

Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=53663

Stefan Fritsch <sf...@sfritsch.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #29173|0                           |1
           is patch|                            |
  Attachment #29173|application/octet-stream    |text/plain
          mime type|                            |

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