V4L/DVB (7460): bttv: Bt832 - fix possible NULL pointer deref

This patch does fix potential NULL pointer dereference

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/media/video/bt8xx/bt832.c b/drivers/media/video/bt8xx/bt832.c
index a51876137880..f92f06dec0d0 100644
--- a/drivers/media/video/bt8xx/bt832.c
+++ b/drivers/media/video/bt8xx/bt832.c
@@ -97,6 +97,11 @@ int bt832_init(struct i2c_client *i2c_client_s)
         int rc;
 
         buf=kmalloc(65,GFP_KERNEL);
+        if (!buf) {
+                v4l_err(&t->client,
+                        "Unable to allocate memory. Detaching.\n");
+                return 0;
+        }
         bt832_hexdump(i2c_client_s,buf);
 
         if(buf[0x40] != 0x31) {
@@ -211,7 +216,12 @@ bt832_command(struct i2c_client *client, unsigned int cmd, void *arg)
         switch (cmd) {
                 case BT832_HEXDUMP: {
                         unsigned char *buf;
-                        buf=kmalloc(65,GFP_KERNEL);
+                        buf = kmalloc(65, GFP_KERNEL);
+                        if (!buf) {
+                                v4l_err(&t->client,
+                                        "Unable to allocate memory\n");
+                                break;
+                        }
                         bt832_hexdump(&t->client,buf);
                         kfree(buf);
                 }