diff options
| -rw-r--r-- | sys/kern/kern_filedesc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/kern_filedesc.c b/sys/kern/kern_filedesc.c index 6cdc1ee..e4fe2f6 100644 --- a/sys/kern/kern_filedesc.c +++ b/sys/kern/kern_filedesc.c @@ -78,7 +78,9 @@ make_write_buf(struct proc *td, const void *data, char **buf_out, size_t count) * A user process called us, so we want to be careful * and use copyin() */ - copyin((uintptr_t)data, buf, count); + if (copyin((uintptr_t)data, buf, count) != 0) { + invalid_uaddr(data); + } } else { /* Can just memcpy() here */ memcpy(buf, (char *)data, count); |