https://bz.apache.org/bugzilla/show_bug.cgi?id=65627
Bug ID: 65627
Summary: apache httpd segfault on child exit
Product: Apache httpd-2
Version: 2.4.49
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Core
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 38061
--> https://bz.apache.org/bugzilla/attachment.cgi?id=38061&action=edit
Patch to prevent the segfault.
This is to report a bug found on Gentoo and the fix for it.
The original bug reported on Gentoo was "www-servers/apache-2.4.49: segfault on
(almost) every request" (https://bugs.gentoo.org/816258).
Testing revealed it seems to be specific to the use of mpm-itk, however there
may be other senarios as well. And a review of the segfault traceback (see the
above mentioned gentoo bug report) and the changes between 2.4.48 and 2.4.49
identified code changes in server/connection.c as the reason for the segfault.
With those changes ap_lingering_close() attempts to pass a NULL pointer to
apr_socket_close() when mpm-itk is in use, but there may be other senarios as
well.
The changes between 2.4.48 and 2.4.49 in server/connection.c where introduced
by this revision: https://svn.apache.org/viewvc?view=revision&revision=1891721
The fix for this bug (see attached patch file) is to avoid calling
apr_socket_close() with a NULL like the previous code did.
This bug was found in 2.4.49, but is still present in 2.4.51 and that is were
the fix was tested.
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