Currently, there is no overflow-check with memdup_user().
Use the new function memdup_array_user() instead of memdup_user() for
duplicating the user-space array safely.
Suggested-by: David Airlie <airl...@redhat.com>
Signed-off-by: Philipp Stanner <pstan...@redhat.com>
Reviewed-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Zack Rusin <za...@vmware.com>
---
kernel/watch_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c
index d0b6b390ee42..778b4056700f 100644
--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -331,7 +331,7 @@ long watch_queue_set_filter(struct pipe_inode_info *pipe,
filter.__reserved != 0)
return -EINVAL;
- tf = memdup_user(_filter->filters, filter.nr_filters * sizeof(*tf));
+ tf = memdup_array_user(_filter->filters, filter.nr_filters,
sizeof(*tf));
if (IS_ERR(tf))
return PTR_ERR(tf);
--
2.41.0
