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Subject DO NOT REPLY [Bug 52559] New: [PATCH] Some PROPPATCH causing segfault in mod_dav_fs / mod_dav
Date Mon, 30 Jan 2012 11:24:35 GMT

             Bug #: 52559
           Summary: [PATCH] Some PROPPATCH causing segfault in mod_dav_fs
                    / mod_dav
           Product: Apache httpd-2
           Version: 2.5-HEAD
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_dav_fs
    Classification: Unclassified

With our product we stumbled across a segfault in mod_dav_fs / mod_dav, as

When a PROPPATCH attempts to remove a non-existent dead property on a resource
for which there is no dead property in the same namespace httpd segfaults
(e.g., attempt to remove a property 'foo' in namespace ''
on a new resource which has no other dead properties).

Furthermore, if the resource had no dead properties, after this segfault httpd
leaves the dead property DBM in a state which causes an httpd segfault on every
PROPFIND (the .pag and .dir files are both zero length).

>From our analysis the problem boils down to three issues. A patch for each

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