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From: Joonwon Kang <kjw1627@gmail.com>
To: keescook@chromium.org
Cc: re.emese@gmail.com, kernel-hardening@lists.openwall.com,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	jinb.park7@gmail.com
Subject: [PATCH 2/2] randstruct: remove dead code in is_pure_ops_struct()
Date: Thu, 1 Aug 2019 03:01:49 +0900	[thread overview]
Message-ID: <281a65cc361512e3dc6c5deffa324f800eb907be.1564595346.git.kjw1627@gmail.com> (raw)
In-Reply-To: <cover.1564595346.git.kjw1627@gmail.com>

Recursive declaration for struct which has member of the same struct
type, for example,

struct foo {
    struct foo f;
    ...
};

is not allowed. So, it is unnecessary to check if a struct has this
kind of member.

Signed-off-by: Joonwon Kang <kjw1627@gmail.com>
---
 scripts/gcc-plugins/randomize_layout_plugin.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c
index bd29e4e7a524..e14efe23e645 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -440,9 +440,6 @@ static int is_pure_ops_struct(const_tree node)
 		const_tree fieldtype = get_field_type(field);
 		enum tree_code code = TREE_CODE(fieldtype);
 
-		if (node == fieldtype)
-			continue;
-
 		if (code == RECORD_TYPE || code == UNION_TYPE) {
 			if (!is_pure_ops_struct(fieldtype))
 				return 0;
-- 
2.17.1


  parent reply	other threads:[~2019-07-31 18:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-31 18:00 [PATCH 0/2] fix is_pure_ops_struct() Joonwon Kang
2019-07-31 18:01 ` [PATCH 1/2] randstruct: fix a bug in is_pure_ops_struct() Joonwon Kang
2019-07-31 19:58   ` Kees Cook
2019-07-31 18:01 ` Joonwon Kang [this message]
2019-07-31 19:59   ` [PATCH 2/2] randstruct: remove dead code " Kees Cook
2019-08-01 13:41     ` Joonwon Kang

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