libdwfl: Don't leak memory in proc_maps_report when ENOEXEC.

We forgot to free last_file on error.

Signed-off-by: Mark Wielaard <mjw@redhat.com>

diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog
index 903c0cc..69fd233 100644 (file)
--- a/libdwfl/ChangeLog
+++ b/libdwfl/ChangeLog
@@ -1,5 +1,9 @@
 2016-02-13  Mark Wielaard  <mjw@redhat.com>
 
+       * linux-proc-maps.c (proc_maps_report): Free last_file when ENOEXEC.
+
+2016-02-13  Mark Wielaard  <mjw@redhat.com>
+
        * frame_unwind.c (new_unwound): Check and return unwound.
        (handle_cfi): Check new_unwound was able to allocate new memory
        before use. Return DWFL_E_NOMEM otherwise.

diff --git a/libdwfl/linux-proc-maps.c b/libdwfl/linux-proc-maps.c
index 9e7b2a2..94b26d5 100644 (file)
--- a/libdwfl/linux-proc-maps.c
+++ b/libdwfl/linux-proc-maps.c
@@ -1,5 +1,5 @@
 /* Standard libdwfl callbacks for debugging a live Linux process.
-   Copyright (C) 2005-2010, 2013, 2014 Red Hat, Inc.
+   Copyright (C) 2005-2010, 2013, 2014, 2016 Red Hat, Inc.
    This file is part of elfutils.
 
    This file is free software; you can redistribute it and/or modify
@@ -218,6 +218,7 @@ proc_maps_report (Dwfl *dwfl, FILE *f, GElf_Addr sysinfo_ehdr, pid_t pid)
          || nread <= 0)
        {
          free (line);
+         free (last_file);
          return ENOEXEC;
        }