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| author | Li Zhong <floridsleeves@gmail.com> | 2022-09-02 10:37:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-31 15:32:57 +0300 |
| commit | b85f0e292f73f353eea915499604fbf50c8238b4 (patch) | |
| tree | 13f1e40b07aa9051a03c496f58fc7cfb5015336c /drivers/acpi/processor_idle.c | |
| parent | 3d340b684dcec5e34efc470227cd1c7d2df121ad (diff) | |
| download | linux-b85f0e292f73f353eea915499604fbf50c8238b4.tar.xz | |
ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value
[ Upstream commit 2437513a814b3e93bd02879740a8a06e52e2cf7d ]
The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().
Signed-off-by: Li Zhong <floridsleeves@gmail.com>
[ rjw: Subject and changelog edits, added empty line after if () ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index acfabfe07c4f..fc5b5b2c9e81 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1134,6 +1134,9 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr) status = acpi_get_parent(handle, &pr_ahandle); while (ACPI_SUCCESS(status)) { d = acpi_fetch_acpi_dev(pr_ahandle); + if (!d) + break; + handle = pr_ahandle; if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID)) |