lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ACPI: pdc init related memory leak with physical CPU hotplug

Browse Source 
arch_acpi_processor_cleanup_pdc() in x86 and ia64 results in memory allocated
for _PDC objects that is never freed and will cause memory leak in case of
physical CPU remove and add. Patch fixes the memory leak by freeing the
objects soon after _PDC is evaluated.

Reported-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Pallipadi, Venkatesh
2009-06-19 17:14:59 -07:00
committed by Len Brown
parent 07a2039b8e
commit 7b768f07dc
4 changed files with 28 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/kernel/acpi/processor.c
View File

@@ -72,6 +72,7 @@ static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c)
return;
}
/* Initialize _PDC data based on the CPU vendor */
void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
{
@@ -85,3 +86,15 @@ void arch_acpi_processor_init_pdc(struct acpi_processor *pr)
}
EXPORT_SYMBOL(arch_acpi_processor_init_pdc);
void arch_acpi_processor_cleanup_pdc(struct acpi_processor *pr)
{
if (pr->pdc) {
kfree(pr->pdc->pointer->buffer.pointer);
kfree(pr->pdc->pointer);
kfree(pr->pdc);
pr->pdc = NULL;
}
}
EXPORT_SYMBOL(arch_acpi_processor_cleanup_pdc);