diff options
| -rw-r--r-- | arch/um/kernel/exitcode.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/um/kernel/exitcode.c b/arch/um/kernel/exitcode.c index 6540d2c9fbb..ce057afb621 100644 --- a/arch/um/kernel/exitcode.c +++ b/arch/um/kernel/exitcode.c @@ -42,9 +42,11 @@ static int write_proc_exitcode(struct file *file, const char __user *buffer, unsigned long count, void *data) { char *end, buf[sizeof("nnnnn\0")]; + size_t size; int tmp; - if (copy_from_user(buf, buffer, count)) + size = min(count, sizeof(buf)); + if (copy_from_user(buf, buffer, size)) return -EFAULT; tmp = simple_strtol(buf, &end, 0); |