https://issues.apache.org/bugzilla/show_bug.cgi?id=52559
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
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
With our product we stumbled across a segfault in mod_dav_fs / mod_dav, as
follows.
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 'http://example.com/bar'
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
follows.
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