From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Thu, 4 Jun 2020 16:16:21 +0000 (+0200)
Subject: media: staging: atomisp: Check return value from compat_alloc_user_space
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a5047a3400d51c043a6501f960eefc8b102c9203;p=linux.git

media: staging: atomisp: Check return value from compat_alloc_user_space

If something gets wrong, return, instead of trying to
convert from a NULL pointer.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---

diff --git a/drivers/staging/media/atomisp/pci/atomisp_compat_ioctl32.c b/drivers/staging/media/atomisp/pci/atomisp_compat_ioctl32.c
index c8649923b6b9e..e06cf1883fc4b 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_compat_ioctl32.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_compat_ioctl32.c
@@ -863,6 +863,8 @@ static long atomisp_do_compat_ioctl(struct file *file,
 				 sizeof(struct atomisp_morph_table) +
 				 sizeof(struct atomisp_dis_coefficients) +
 				 sizeof(struct atomisp_dvs_6axis_config) : 0));
+	if (!karg)
+		return -ENOMEM;
 
 	/* First, convert the command. */
 	switch (cmd) {