Launchpad has imported 4 comments from the remote bug at https://bz.apache.org/bugzilla/show_bug.cgi?id=57328.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2014-12-08T11:16:20+00:00 A-abfalterer wrote: Created attachment 32268 Patch to dump elements of ap_server_config_defines after a graceful restart, includes also fix for the problem == Reproduction == 1) Find attached a patch for server/core.c that dumps the elements of ap_server_config_defines after a graceful restart. 2) Define some variables in httpd.conf, e.g. Define arg1=val1 Define arg2=val2 Define arg3=val4 3) By doing some graceful restarts (5-10 times), the increasing number of array elements with invalid memory references can be observerd. The problem can be reproduced each time. == Explanation == After a graceful restart, the reset_config_defines() function in server/core.c resets ap_server_config_defines back to its original pointer saved_server_config_defines. Henceforth, variable definitions (by means of Define) are stored in the original array, and thus, leading to invalid memory access upon next graceful restarts. == Solution == A fix to the problem can be found in the provided patch file and be enabled by setting the macro constant WITH_FIX to 1. Regards, Armin Reply at: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1504354/comments/0 ------------------------------------------------------------------------ On 2014-12-08T14:35:43+00:00 Ylavic-dev wrote: Committed in r1643825. I first misread your patch and started working on a much more complicated one, until I realized yours was the minimal/only change needed. Thanks for the analysis and patch Armin, will propose it for 2.4.x. Reply at: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1504354/comments/1 ------------------------------------------------------------------------ On 2014-12-08T14:39:06+00:00 Ylavic-dev wrote: *** Bug 56008 has been marked as a duplicate of this bug. *** Reply at: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1504354/comments/2 ------------------------------------------------------------------------ On 2015-01-23T08:10:03+00:00 Ylavic-dev wrote: Backported to 2.4.11 (unreleased) in r1651083, available in upcoming 2.4.12. Reply at: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1504354/comments/3 ** Changed in: apache2 Status: Unknown => Fix Released ** Changed in: apache2 Importance: Unknown => Critical -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to apache2 in Ubuntu. https://bugs.launchpad.net/bugs/1504354 Title: Invalid memory access on ap_server_config_defines To manage notifications about this bug go to: https://bugs.launchpad.net/apache2/+bug/1504354/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
