Commit 18004e6f authored by Ulf Magnusson's avatar Ulf Magnusson Committed by Greg Kroah-Hartman
Browse files

kconfig: Fix expr_free() E_NOT leak


[ Upstream commit 5b1374b3

 ]

Only the E_NOT operand and not the E_NOT node itself was freed, due to
accidentally returning too early in expr_free(). Outline of leak:

	switch (e->type) {
	...
	case E_NOT:
		expr_free(e->left.expr);
		return;
	...
	}
	*Never reached, 'e' leaked*
	free(e);

Fix by changing the 'return' to a 'break'.

Summary from Valgrind on 'menuconfig' (ARCH=x86) before the fix:

	LEAK SUMMARY:
	   definitely lost: 44,448 bytes in 1,852 blocks
	   ...

Summary after the fix:

	LEAK SUMMARY:
	   definitely lost: 1,608 bytes in 67 blocks
	   ...
Signed-off-by: default avatarUlf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada's avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0f511f3d
......@@ -113,7 +113,7 @@ void expr_free(struct expr *e)
break;
case E_NOT:
expr_free(e->left.expr);
return;
break;
case E_EQUAL:
case E_GEQ:
case E_GTH:
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment