staging: most: core: check value returned by match function (3ba5515b) · Commits · 戴 / test

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>

drivers/staging/most/core.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -711,6 +711,8 @@ static ssize_t add_link_store(struct device_driver *drv,
		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 @@ static ssize_t remove_link_store(struct device_driver *drv,
		if (ret)
		return ret;
		comp = match_component(comp_name);
		if (!comp)
		return -ENODEV;
		c = get_channel(mdev, mdev_ch);
		if (!c)
		return -ENODEV;

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