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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2021-02-19 12:54:38 +0300 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2021-02-19 07:40:23 -0800 |
| commit | 58294927f468a428c7a1ba09cf986fdca14a2747 (patch) | |
| tree | 33254d7e5091702c416c619cfd2acb32f87e3685 /drivers/cxl | |
| parent | MAINTAINERS: Add maintainers of the CXL driver (diff) | |
| download | linux-dev-58294927f468a428c7a1ba09cf986fdca14a2747.tar.xz linux-dev-58294927f468a428c7a1ba09cf986fdca14a2747.zip | |
cxl/mem: Return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining to be
copied, but we want to return -EFAULT if the copy doesn't complete.
Fixes: b754ffbbc0ee ("cxl/mem: Add basic IOCTL interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YC+K3kgzqm20zCWY@mwanda
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/mem.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c index 6d7d3870b5da..df895bcca63a 100644 --- a/drivers/cxl/mem.c +++ b/drivers/cxl/mem.c @@ -752,7 +752,10 @@ static int cxl_send_cmd(struct cxl_memdev *cxlmd, if (rc) return rc; - return copy_to_user(s, &send, sizeof(send)); + if (copy_to_user(s, &send, sizeof(send))) + return -EFAULT; + + return 0; } static long __cxl_memdev_ioctl(struct cxl_memdev *cxlmd, unsigned int cmd, |