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* [binutils-gdb] libctf: fix refcount leak in ctf_import
@ 2019-10-03 16:34 Jose E.Marchesi
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From: Jose E.Marchesi @ 2019-10-03 16:34 UTC (permalink / raw)
To: bfd-cvs, gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ad613f1d0693e02bdc86047c479315d5f969e2f7
commit ad613f1d0693e02bdc86047c479315d5f969e2f7
Author: Nick Alcock <nick.alcock@oracle.com>
Date: Tue Sep 17 06:59:31 2019 +0100
libctf: fix refcount leak in ctf_import
Calling ctf_import (fp, NULL) to cancel out a pre-existing import leaked
the refcnt increment on the parent, so it could never be freed.
New in v4.
libctf/
* ctf-open.c (ctf_import): Do not leak a ctf_file_t ref on every
ctf_import after the first for a given file.
Diff:
---
libctf/ChangeLog | 5 +++++
libctf/ctf-open.c | 2 ++
2 files changed, 7 insertions(+)
diff --git a/libctf/ChangeLog b/libctf/ChangeLog
index b7f12d8..982c335 100644
--- a/libctf/ChangeLog
+++ b/libctf/ChangeLog
@@ -1,5 +1,10 @@
2019-09-23 Nick Alcock <nick.alcock@oracle.com>
+ * ctf-open.c (ctf_import): Do not leak a ctf_file_t ref on every
+ ctf_import after the first for a given file.
+
+2019-09-23 Nick Alcock <nick.alcock@oracle.com>
+
* ctf-impl.h (ctf_str_append_noerr): Declare.
* ctf-util.c (ctf_str_append_noerr): Define in terms of
ctf_str_append.
diff --git a/libctf/ctf-open.c b/libctf/ctf-open.c
index 4a95b7f..aedf390 100644
--- a/libctf/ctf-open.c
+++ b/libctf/ctf-open.c
@@ -1778,6 +1778,7 @@ ctf_import (ctf_file_t *fp, ctf_file_t *pfp)
if (fp->ctf_parent != NULL)
{
+ fp->ctf_parent->ctf_refcnt--;
ctf_file_close (fp->ctf_parent);
fp->ctf_parent = NULL;
}
@@ -1793,6 +1794,7 @@ ctf_import (ctf_file_t *fp, ctf_file_t *pfp)
fp->ctf_flags |= LCTF_CHILD;
pfp->ctf_refcnt++;
}
+
fp->ctf_parent = pfp;
return 0;
}
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