Sachin Kamat reports that "component: add support for component match array" broke Exynos DRM due to a NULL pointer deref. Fix this.
Reported-by: Sachin Kamat <sachin.kamat at samsung.com> Tested-by: Sachin Kamat <sachin.kamat at samsung.com> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk> --- drivers/base/component.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/base/component.c b/drivers/base/component.c index b4236daed4fa..f748430bb654 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -293,10 +293,12 @@ int component_master_add_with_match(struct device *dev, if (ops->add_components && match) return -EINVAL; - /* Reallocate the match array for its true size */ - match = component_match_realloc(dev, match, match->num); - if (IS_ERR(match)) - return PTR_ERR(match); + if (match) { + /* Reallocate the match array for its true size */ + match = component_match_realloc(dev, match, match->num); + if (IS_ERR(match)) + return PTR_ERR(match); + } master = kzalloc(sizeof(*master), GFP_KERNEL); if (!master) -- 1.8.3.1