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| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2018-11-29 12:55:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-17 11:24:40 +0300 |
| commit | 126afacf7a8f1a5c7499ab905613749de1748e55 (patch) | |
| tree | 6dbbfe7fc72041235aca9e20f54dc2dafbbf5f96 | |
| parent | 992a773cb9bbd17e79647a3bfced86f2a4c8d5ad (diff) | |
| download | linux-126afacf7a8f1a5c7499ab905613749de1748e55.tar.xz | |
ACPI/IORT: Fix iort_get_platform_device_domain() uninitialized pointer value
[ Upstream commit ea2412dc21cc790335d319181dddc43682aef164 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/acpi/arm64/iort.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 08f26db2da7e..e938576e58cb 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; |