From: Vincent Stehlé <vincent.stehle@laposte.net> [ Upstream commit 060ea4271a82270be6d44e8e9aefe8f155fb5626 ] The `np->permission' structure is smaller than the `np' structure but sizeof(*np) worth of data is copied in there. Fix the size passed to copy_from_user() to avoid overrun. Fixes: 3d2ec9dcd553 ("staging: Android: Add 'vsoc' driver for cuttlefish.") Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/staging/android/vsoc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/android/vsoc.c b/drivers/staging/android/vsoc.c index 22571ab..034d868 100644 --- a/drivers/staging/android/vsoc.c +++ b/drivers/staging/android/vsoc.c @@ -260,7 +260,8 @@ static int vsoc_probe_device(struct pci_dev *pdev, atomic_t *owner_ptr = NULL; struct vsoc_device_region *managed_region_p; - if (copy_from_user(&np->permission, &arg->perm, sizeof(*np)) || + if (copy_from_user(&np->permission, + &arg->perm, sizeof(np->permission)) || copy_from_user(&managed_fd, &arg->managed_region_fd, sizeof(managed_fd))) { return -EFAULT; -- 1.8.3