--- wikisrc/pkgsrc/hardening.mdwn	2019/01/06 14:58:39	1.39
+++ wikisrc/pkgsrc/hardening.mdwn	2019/01/06 15:24:42	1.40
@@ -221,8 +221,26 @@ for part or all of the build.
 
 ### Run-time crashes
 
-Again, this feature may cause some programs to crash, usually indicating an
-actual bug in the program. Patching the original program is then required.
+Again, this feature may cause some programs to crash via a SIGABRT,
+usually indicating an actual bug in the program.
+
+On NetBSD `LOG_CRIT` level `syslog()` messages are sent and - by
+default - appended to `/var/log/messages`, e.g.:
+
+   Jan  6 15:42:51 <hostname> -: <hostname> <program> - - - buffer overflow detected; terminated
+
+(where `<hostname>` is the `hostname(1)` and `<program>` is the
+`basename(1)` of the program crashed).
+
+Patching the original program is then required.
+
+Rebuilding the package via:
+
+    % env CFLAGS=-g INSTALL_UNSTRIPPED=yes make replace
+
+and inspecting the `backtrace` of the coredump via the debugger
+should point out the problematic call by inspecting the frame
+calling the `_chk()' (SSP) function.
 
 ### Performance impact