A bug fix to gpsbabel related to this:
https://bugzilla.redhat.com/show_bug.cgi?id=989851
Tested on 5.6 amd64.
Index: Makefile
===================================================================
RCS file: /cvs/ports/geo/gpsbabel/Makefile,v
retrieving revision 1.26
diff -u -p -r1.26 Makefile
--- Makefile 10 Oct 2013 02:08:22 -0000 1.26
+++ Makefile 10 Feb 2015 09:18:42 -0000
@@ -11,9 +11,9 @@ PKGNAME-tk= gpsbabel-tk-${VERSION}
PKGNAME-qt= gpsbabel-qt-${VERSION}
CATEGORIES= geo
-REVISION-main= 0
-REVISION-tk= 0
-REVISION-qt= 0
+REVISION-main= 1
+REVISION-tk= 1
+REVISION-qt= 1
HOMEPAGE= http://www.gpsbabel.org/
Index: patches/patch-garmin_fit_c
===================================================================
RCS file: patches/patch-garmin_fit_c
diff -N patches/patch-garmin_fit_c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ patches/patch-garmin_fit_c 10 Feb 2015 09:18:42 -0000
@@ -0,0 +1,20 @@
+$OpenBSD$
+
+- fix a bug in garmin_fit parsing
+ https://bugzilla.redhat.com/show_bug.cgi?id=989851
+
+--- garmin_fit.c.orig Tue Feb 10 09:40:34 2015
++++ garmin_fit.c Tue Feb 10 09:46:30 2015
+@@ -113,6 +113,12 @@ fit_parse_header(void)
+ debug_print(1,"%s: profile version=%d\n", MYNAME, ver);
+ debug_print(1,"%s: fit_data.len=%d\n", MYNAME, fit_data.len);
+ }
++
++ if (len > 12) {
++ is_fatal(len != 14, MYNAME ": .FIT header with unrecognized size\n");
++ // Unused according to Ingo Arndt
++ gbfgetuint16(fin);
++ }
+ }
+
+ static gbuint8
--
Manuel Giraud
