From: ZhengShunQian <zhengsq@rock-chips.com>
Date: Wed, 30 Sep 2015 12:33:56 +0000 (+0100)
Subject: nvmem: core: fix the out-of-range leak in read/write()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7c806883e143dc60439e6bdb3589700ebed1efaa;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

nvmem: core: fix the out-of-range leak in read/write()

The position to read/write must be less than max
register size.

Signed-off-by: ZhengShunQian <zhengsq@rock-chips.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index d3c6676b3c0c..f4af8e5fcd94 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -67,7 +67,7 @@ static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj,
 	int rc;
 
 	/* Stop the user from reading */
-	if (pos > nvmem->size)
+	if (pos >= nvmem->size)
 		return 0;
 
 	if (pos + count > nvmem->size)
@@ -92,7 +92,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
 	int rc;
 
 	/* Stop the user from writing */
-	if (pos > nvmem->size)
+	if (pos >= nvmem->size)
 		return 0;
 
 	if (pos + count > nvmem->size)