[PATCH 13/44] kmsg: properly support writev to avoid interleaved printk lines fix

Greg Kroah-Hartman
2011-05-20T00:19:12Z

From: Andrew Morton <akpm@linux-foundation.org>

make `len' size_t, avoid multiple-assignments.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Lennart Poettering <lennart@poettering.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/char/mem.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 78923a9..8fc04b4 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -810,11 +810,11 @@ static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv,
unsigned long count, loff_t pos)
{
char *line, *p;
- int len, i;
+ int i;
ssize_t ret = -EFAULT;
+ size_t len = iov_length(iv, count);

- len = iov_length(iv, count);
- line = p = kmalloc(len + 1, GFP_KERNEL);
+ line = kmalloc(len + 1, GFP_KERNEL);
if (line == NULL)
return -ENOMEM;

@@ -822,6 +822,7 @@ static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv,
* copy all vectors into a single string, to ensure we do
* not interleave our log line with other printk calls
*/
+ p = line;
for (i = 0; i < count; i++) {
if (copy_from_user(p, iv[i].iov_base, iv[i].iov_len))
goto out;
--
1.7.4.2