Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-16 08:02:17 +00:00
Code Issues Packages Projects Releases Wiki Activity

[S390] call home: fix local buffer usage in proc handler

Browse Source 
Fix the size of the local buffer and use snprintf to prevent
further miscalculations. Also fix the usage of bitwise vs logic
operations.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2009-10-29 15:04:07 +01:00 committed by Martin Schwidefsky
parent 964fe080d9
commit 3f0b3c33ee
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/s390/char/sclp_async.c
View File

@ -68,15 +68,14 @@ static int proc_handler_callhome(struct ctl_table *ctl, int write,
{
unsigned long val;
int len, rc;
char buf[2];
char buf[3];
if (!*count | (*ppos && !write)) {
if (!*count || (*ppos && !write)) {
*count = 0;
return 0;
}
if (!write) {
len = sprintf(buf, "%d\n", callhome_enabled);
buf[len] = '\0';
len = snprintf(buf, sizeof(buf), "%d\n", callhome_enabled);
rc = copy_to_user(buffer, buf, sizeof(buf));
if (rc != 0)
return -EFAULT;