Memory management: drop variables identified as going out-of-scope

[exim.git] / doc / doc-txt / ChangeLog

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 6cd472434e79f41e724dda26986e662e099a9e63..c23f9fe2dcb3f9c888cbe158968cb53b7f3108bf 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -81,6 +81,14 @@ PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
 
 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
 
+JH/16 Drop variables when they go out of scope.  Memory management drops a whole
+      region in one operation, for speed, and this leaves assigned pointers
+      dangling.  Add checks run only under the testsuite which checks all
+      variables at a store-reset and panics on a dangling pointer; add code
+      explicitly nulling out all the variables discovered.  Fixes one known
+      bug: a transport crash, where a dangling pointer for $sending_ip_address
+      originally assigned in a verify callout, is re-used.
+
 
 Exim version 4.88
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