dfl.c utilizes memdup_user() and array_size() to copy a userspace array. Currently, this does not check for an overflow. Use the new wrapper memdup_array_user() to copy the array more safely. Suggested-by: Dave Airlie <airlied@xxxxxxxxxx> Signed-off-by: Philipp Stanner <pstanner@xxxxxxxxxx> --- Linus recently merged this new wrapper for Kernel v6.7 --- drivers/fpga/dfl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index dd7a783d53b5..e69b9f1f2a50 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -2008,8 +2008,8 @@ long dfl_feature_ioctl_set_irq(struct platform_device *pdev, (hdr.start + hdr.count < hdr.start)) return -EINVAL; - fds = memdup_user((void __user *)(arg + sizeof(hdr)), - array_size(hdr.count, sizeof(s32))); + fds = memdup_array_user((void __user *)(arg + sizeof(hdr)), + hdr.count, sizeof(s32)); if (IS_ERR(fds)) return PTR_ERR(fds); -- 2.41.0
