From b391554c61cb353c279523a706734b090aaf9000 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Tue, 25 Feb 2020 09:47:46 -0700 Subject: dmaengine: idxd: check return result from check_vma() in cdev The returned result from the check_vma() function in the cdev ->mmap() call needs to be handled. Add the check and returning error. Fixes: 42d279f9137a ("dmaengine: idxd: add char driver to expose submission portal to userland") Reported-by: Vinod Koul Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/158264926659.9387.14325163515683047959.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Vinod Koul --- drivers/dma/idxd/cdev.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/dma/idxd/cdev.c') diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index 8dfdbe37e381..8f323e7855c4 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -137,6 +137,8 @@ static int idxd_cdev_mmap(struct file *filp, struct vm_area_struct *vma) dev_dbg(&pdev->dev, "%s called\n", __func__); rc = check_vma(wq, vma, __func__); + if (rc < 0) + return rc; vma->vm_flags |= VM_DONTCOPY; pfn = (base + idxd_get_wq_portal_full_offset(wq->id, -- cgit v1.2.3