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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2018-11-29 12:55:59 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2018-11-30 20:28:39 +0300
commitea2412dc21cc790335d319181dddc43682aef164 (patch)
tree1ca875b940d0dc6187939022020616272e6b5e79 /drivers/acpi/arm64
parent874bfc6e5422d2421f7e4d5ea318d30e91679dfe (diff)
downloadlinux-ea2412dc21cc790335d319181dddc43682aef164.tar.xz
ACPI/IORT: Fix iort_get_platform_device_domain() uninitialized pointer value
Running the Clang static analyzer on IORT code detected the following error: Logic error: Branch condition evaluates to a garbage value in iort_get_platform_device_domain() If the named component associated with a given device has no IORT mappings, iort_get_platform_device_domain() exits its MSI mapping loop with msi_parent pointer containing garbage, which can lead to erroneous code path execution. Initialize the msi_parent pointer, fixing the bug. Fixes: d4f54a186667 ("ACPI: platform: setup MSI domain for ACPI based platform device") Reported-by: Patrick Bellasi <patrick.bellasi@arm.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/acpi/arm64')
-rw-r--r--drivers/acpi/arm64/iort.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 2a361e22d38d..70f4e80b9246 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -700,7 +700,7 @@ static void iort_set_device_domain(struct device *dev,
*/
static struct irq_domain *iort_get_platform_device_domain(struct device *dev)
{
- struct acpi_iort_node *node, *msi_parent;
+ struct acpi_iort_node *node, *msi_parent = NULL;
struct fwnode_handle *iort_fwnode;
struct acpi_iort_its_group *its;
int i;