The phdrs buffer could come from the core file or through the executable.
dwfl_link_map_report would leak the buffer if it came from the executable.
Track where the buffer came from and free appropriately.
Signed-off-by: Mark Wielaard <m...@redhat.com>
---
libdwfl/ChangeLog | 5 +++++
libdwfl/link_map.c | 9 +++++++--
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog
index 9640b4f..30a5205 100644
--- a/libdwfl/ChangeLog
+++ b/libdwfl/ChangeLog
@@ -1,5 +1,10 @@
2015-12-01 Mark Wielaard <m...@redhat.com>
+ * link_map.c (dwfl_link_map_report): Track whether in.d_buf comes
+ from exec or memory_callback, free as appropriate.
+
+2015-12-01 Mark Wielaard <m...@redhat.com>
+
* libdwflP.h (struct Dwfl_User_Core): New.
(struct DWfl): Replace executable_for_core with user_core.
* argp-std.c (parse_opt): Store core and fd in Dwfl user_core.
diff --git a/libdwfl/link_map.c b/libdwfl/link_map.c
index e73b219..2bc0400 100644
--- a/libdwfl/link_map.c
+++ b/libdwfl/link_map.c
@@ -791,6 +791,7 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t
auxv_size,
bool in_ok = (*memory_callback) (dwfl, phdr_segndx, &in.d_buf,
&in.d_size, phdr, phnum * phent,
memory_callback_arg);
+ bool in_from_exec = false;
if (! in_ok
&& dwfl->user_core != NULL
&& dwfl->user_core->executable_for_core != NULL)
@@ -855,6 +856,7 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t
auxv_size,
return false;
}
in_ok = true;
+ in_from_exec = true;
}
if (in_ok)
{
@@ -903,8 +905,11 @@ dwfl_link_map_report (Dwfl *dwfl, const void *auxv, size_t
auxv_size,
}
}
- (*memory_callback) (dwfl, -1, &in.d_buf, &in.d_size, 0, 0,
- memory_callback_arg);
+ if (in_from_exec)
+ free (in.d_buf);
+ else
+ (*memory_callback) (dwfl, -1, &in.d_buf, &in.d_size, 0, 0,
+ memory_callback_arg);
free (buf);
}
else
--
2.5.0
