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| author |  Dave Jiang <dave.jiang@intel.com>
| 2020-02-25 09:47:46 -0700 |
|---|---|---|
| committer |  Vinod Koul <vkoul@kernel.org>
| 2020-03-02 12:43:49 +0530 |
| commit | b391554c61cb353c279523a706734b090aaf9000 (patch) | |
| tree | 5ae8af249ed19c15dc64d1f6326793c49affde22 /drivers/dma/idxd/cdev.c | |
| parent | dmaengine: tegra-apb: Improve error message about DMA underflow (diff) | |
| download | linux-b391554c61cb353c279523a706734b090aaf9000.tar.gz linux-b391554c61cb353c279523a706734b090aaf9000.tar.bz2 linux-b391554c61cb353c279523a706734b090aaf9000.zip | |
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 <vkoul@kernel.org>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/158264926659.9387.14325163515683047959.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/cdev.c')
| -rw-r--r-- | drivers/dma/idxd/cdev.c | 2 |
1 files changed, 2 insertions, 0 deletions
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, |