diff options
| -rw-r--r-- | drivers/char/mem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 91dd669..a85f3a3 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -817,7 +817,7 @@ static ssize_t kmsg_write(struct file * file, const char __user * buf, size_t count, loff_t *ppos) { char *tmp; - int ret; + ssize_t ret; tmp = kmalloc(count + 1, GFP_KERNEL); if (tmp == NULL) @@ -826,6 +826,9 @@ static ssize_t kmsg_write(struct file * file, const char __user * buf, if (!copy_from_user(tmp, buf, count)) { tmp[count] = 0; ret = printk("%s", tmp); + if (ret > count) + /* printk can add a prefix */ + ret = count; } kfree(tmp); return ret; |