6.12-stable review patch. If anyone has any objections, please let me know.
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From: Pengjie Zhang zhangpengjie2@huawei.com
commit f103fa127c93016bcd89b05d8e11dc1a84f6990d upstream.
Local variable 'ret' in acpi_pcc_address_space_setup() is currently declared as 'static'. This can lead to race conditions in a multithreaded environment.
Remove the 'static' qualifier to ensure that 'ret' will be allocated directly on the stack as a local variable.
Fixes: a10b1c99e2dc ("ACPI: PCC: Setup PCC Opregion handler only if platform interrupt is available") Signed-off-by: Pengjie Zhang zhangpengjie2@huawei.com Reviewed-by: Sudeep Holla sudeep.holla@arm.com Acked-by: lihuisong@huawei.com Cc: 6.2+ stable@vger.kernel.org # 6.2+ [ rjw: Changelog edits ] Link: https://patch.msgid.link/20251210132634.2050033-1-zhangpengjie2@huawei.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/acpi_pcc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/acpi/acpi_pcc.c +++ b/drivers/acpi/acpi_pcc.c @@ -53,7 +53,7 @@ acpi_pcc_address_space_setup(acpi_handle struct pcc_data *data; struct acpi_pcc_info *ctx = handler_context; struct pcc_mbox_chan *pcc_chan; - static acpi_status ret; + acpi_status ret;
data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data)