lkml.org 
[lkml]   [2011]   [May]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/9] debugfs: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning
Date
Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:

In file included from arch/x86/include/asm/uaccess.h:573,
from include/linux/uaccess.h:5,
from include/linux/highmem.h:7,
from include/linux/pagemap.h:10,
from fs/debugfs/file.c:18:
In function 'copy_from_user',
inlined from 'write_file_bool' at fs/debugfs/file.c:435:
arch/x86/include/asm/uaccess_64.h:65: warning: call to
'copy_from_user_overflow' declared with attribute warning:
copy_from_user() buffer size is not provably correct

presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
fs/debugfs/file.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 89d394d..7ead5b8 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -428,7 +428,7 @@ static ssize_t write_file_bool(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[32];
- int buf_size;
+ size_t buf_size;
u32 *val = file->private_data;

buf_size = min(count, (sizeof(buf)-1));
--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.


\
 
 \ /
  Last update: 2011-05-13 01:53    [W:0.261 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site