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| author | Zhao Yakui <yakui.zhao@intel.com> | 2008-01-28 13:53:30 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-02 02:29:58 -0500 |
| commit | 87654273ef63213f90c4243913987436495824f0 (patch) | |
| tree | 153e50bad32997325657b78d759855e797dac20d /drivers/acpi/processor_throttling.c | |
| parent | 3abbd337c60591305cbfeb984ff2922c175be37f (diff) | |
| download | linux-stable-87654273ef63213f90c4243913987436495824f0.tar.gz linux-stable-87654273ef63213f90c4243913987436495824f0.tar.bz2 linux-stable-87654273ef63213f90c4243913987436495824f0.zip | |
ACPI : Check parameter when calling acpi_processor_get/set_throttling
It is necessary to check the parameter when calling the function of
acpi_processor_get/set_throttling function so as to avoid the NULL
pointer reference in pr or throttling.
http://bugzilla.kernel.org/show_bug.cgi?id=9747
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_throttling.c')
| -rw-r--r-- | drivers/acpi/processor_throttling.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c index 1685b40abda7..5d2eae207886 100644 --- a/drivers/acpi/processor_throttling.c +++ b/drivers/acpi/processor_throttling.c @@ -589,6 +589,11 @@ static int acpi_processor_get_throttling(struct acpi_processor *pr) cpumask_t saved_mask; int ret; + if (!pr) + return -EINVAL; + + if (!pr->flags.throttling) + return -ENODEV; /* * Migrate task to the cpu pointed by pr. */ @@ -743,6 +748,16 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state) { cpumask_t saved_mask; int ret; + + if (!pr) + return -EINVAL; + + if (!pr->flags.throttling) + return -ENODEV; + + if ((state < 0) || (state > (pr->throttling.state_count - 1))) + return -EINVAL; + /* * Migrate task to the cpu pointed by pr. */ |