`pcc_mailbox_probe` doesn't initialize all memory that has been allocated before the first time that one of it's members `txdone_irq` may be accessed. This leads to a an invalid load any time that this member is accessed: [ 2.429769] UBSAN: invalid-load in drivers/mailbox/pcc.c:684:22 [ 2.430324] UBSAN: invalid-load in drivers/mailbox/mailbox.c:486:12 [ 4.276782] UBSAN: invalid-load in drivers/acpi/cppc_acpi.c:314:45 Link: https://bugzilla.kernel.org/show_bug.cgi?id=215587 Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe") Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> --- drivers/mailbox/pcc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c index ed18936b8ce6..ebfa33a40fce 100644 --- a/drivers/mailbox/pcc.c +++ b/drivers/mailbox/pcc.c @@ -654,7 +654,7 @@ static int pcc_mbox_probe(struct platform_device *pdev) goto err; } - pcc_mbox_ctrl = devm_kmalloc(dev, sizeof(*pcc_mbox_ctrl), GFP_KERNEL); + pcc_mbox_ctrl = devm_kzalloc(dev, sizeof(*pcc_mbox_ctrl), GFP_KERNEL); if (!pcc_mbox_ctrl) { rc = -ENOMEM; goto err; -- 2.25.1
