From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Randy Dunlap <rdunlap@infradead.org>,
Ingo Molnar <mingo@kernel.org>, Rik van Riel <riel@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Mel Gorman <mgorman@suse.de>, Aaron Tomlin <atomlin@redhat.com>,
Li Zefan <lizefan@huawei.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ryan Mallon <rmallon@gmail.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
Dario Faggioli <raistlin@linux.it>, Jens Axboe <axboe@fb.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Michael Ellerman <michael@ellerman.id.au>,
linux-doc@vger.kernel.org
Subject: [PATCH 1/4] sysctl: clean up char buffer arguments
Date: Thu, 1 May 2014 14:26:34 -0700 [thread overview]
Message-ID: <1398979597-3589-2-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1398979597-3589-1-git-send-email-keescook@chromium.org>
The char buffer arguments are needlessly cast in weird places. Clean it up
so things are easier to read.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
kernel/sysctl.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 74f5b580fe34..e7ff80a73c44 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1698,8 +1698,8 @@ int __init sysctl_init(void)
#ifdef CONFIG_PROC_SYSCTL
-static int _proc_do_string(void* data, int maxlen, int write,
- void __user *buffer,
+static int _proc_do_string(char *data, int maxlen, int write,
+ char __user *buffer,
size_t *lenp, loff_t *ppos)
{
size_t len;
@@ -1725,7 +1725,7 @@ static int _proc_do_string(void* data, int maxlen, int write,
len = maxlen-1;
if(copy_from_user(data, buffer, len))
return -EFAULT;
- ((char *) data)[len] = 0;
+ data[len] = 0;
*ppos += *lenp;
} else {
len = strlen(data);
@@ -1743,10 +1743,10 @@ static int _proc_do_string(void* data, int maxlen, int write,
if (len > *lenp)
len = *lenp;
if (len)
- if(copy_to_user(buffer, data, len))
+ if (copy_to_user(buffer, data, len))
return -EFAULT;
if (len < *lenp) {
- if(put_user('\n', ((char __user *) buffer) + len))
+ if (put_user('\n', buffer + len))
return -EFAULT;
len++;
}
@@ -1776,8 +1776,8 @@ static int _proc_do_string(void* data, int maxlen, int write,
int proc_dostring(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
- return _proc_do_string(table->data, table->maxlen, write,
- buffer, lenp, ppos);
+ return _proc_do_string((char *)(table->data), table->maxlen, write,
+ (char __user *)buffer, lenp, ppos);
}
static size_t proc_skip_spaces(char **buf)
--
1.7.9.5
next prev parent reply other threads:[~2014-05-01 21:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-01 21:26 [PATCH v3 0/4] sysctl: fix incorrect write position handling Kees Cook
2014-05-01 21:26 ` Kees Cook [this message]
2014-05-01 21:26 ` [PATCH 2/4] sysctl: refactor sysctl string writing logic Kees Cook
2014-05-01 21:26 ` [PATCH 3/4] sysctl: allow for strict write position handling Kees Cook
2014-05-01 21:26 ` [PATCH 4/4] test: validate sysctl_writes_strict Kees Cook
2014-05-03 14:42 ` Randy Dunlap
2014-05-06 1:29 ` Kees Cook
2014-05-05 22:00 ` [PATCH v3 0/4] sysctl: fix incorrect write position handling Andrew Morton
2014-05-06 1:28 ` Kees Cook
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