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Aug 6, 2012, 12:31 PM
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[Bug 53663] New: Use of uninitialized memory in mod_rewrite, when RewriteMap is dbd or fastdbd
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https://issues.apache.org/bugzilla/show_bug.cgi?id=53663
Priority: P2
Bug ID: 53663
Assignee: bugs [at] httpd
Summary: Use of uninitialized memory in mod_rewrite, when
RewriteMap is dbd or fastdbd
Severity: major
Classification: Unclassified
OS: All
Reporter: mi+apache [at] aldan
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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