staging: most: core: check value returned by match function
This patch adds a check for the pointer returned by the function
match_component. It is needed to prevent a NULL pointer dereference in
case the provided component name does not match any list entry.
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/most/core.c b/drivers/staging/most/core.c
index 839e6cf..6e7dcb5 100644
--- a/drivers/staging/most/core.c
+++ b/drivers/staging/most/core.c
@@ -711,6 +711,8 @@
if (ret)
return ret;
comp = match_component(comp_name);
+ if (!comp)
+ return -ENODEV;
if (!comp_param || *comp_param == 0) {
snprintf(devnod_buf, sizeof(devnod_buf), "%s-%s", mdev,
mdev_ch);
@@ -754,6 +756,8 @@
if (ret)
return ret;
comp = match_component(comp_name);
+ if (!comp)
+ return -ENODEV;
c = get_channel(mdev, mdev_ch);
if (!c)
return -ENODEV;