linux-kernel - [PATCH] selinux: Remove load size limit

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Message-Id: <1569031035-12354-1-git-send-email-zhang.lin16@zte.com.cn>
Date:   Sat, 21 Sep 2019 09:57:15 +0800
From:   zhanglin <zhang.lin16@....com.cn>
To:     paul@...l-moore.com
Cc:     sds@...ho.nsa.gov, eparis@...isplace.org, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org, xue.zhihong@....com.cn,
        wang.yi59@....com.cn, jiang.xuexin@....com.cn,
        zhanglin <zhang.lin16@....com.cn>
Subject: [PATCH] selinux: Remove load size limit

Load size was limited to 64MB, this was legacy limitation due to vmalloc()
which was removed a while ago.

Limiting load size to 64MB is both pointless and affects real world use
cases.

Signed-off-by: zhanglin <zhang.lin16@....com.cn>
---
 security/selinux/selinuxfs.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index f3a5a138a096..4249400e9712 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -549,10 +549,6 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
 	if (*ppos != 0)
 		goto out;
 
-	length = -EFBIG;
-	if (count > 64 * 1024 * 1024)
-		goto out;
-
 	length = -ENOMEM;
 	data = vmalloc(count);
 	if (!data)
-- 
2.17.1