From eeca209124bb694650026216d3e59cae02d91686 Mon Sep 17 00:00:00 2001 From: Shree Ramamoorthy Date: Fri, 20 Jun 2025 10:45:41 -0500 Subject: [PATCH] regulator: tps65219: Fix devm_kmalloc size allocation In probe(), two arrays of structs are allocated with the devm_kmalloc() function, but the memory size of the allocations were given as the arrays' length (pmic->common_irq_size for the first call and pmic->dev_irq_size for the second devm_kmalloc call). The memory size should have been the total memory needed. This led to a heap overflow when the struct array was used. The issue was first discovered with the PocketBeagle2 and BeaglePlay. The common and device-specific structs are now allocated one at a time within the loop. Fixes: 38c9f98db20a ("regulator: tps65219: Add support for TPS65215 Regulator IRQs") Reported-by: Dhruva Gole Closes: https://lore.kernel.org/all/20250619153526.297398-1-d-gole@ti.com/ Tested-by: Robert Nelson Acked-by: Andrew Davis Signed-off-by: Shree Ramamoorthy Reviewed-by: Nishanth Menon Link: https://patch.msgid.link/20250620154541.2713036-1-s-ramamoorthy@ti.com Signed-off-by: Mark Brown --- drivers/regulator/tps65219-regulator.c | 28 +++++++++++++------------- 1 file changed, 14 insertions(+), 14 deletions(-) diff --git a/drivers/regulator/tps65219-regulator.c b/drivers/regulator/tps65219-regulator.c index b16b300d7f45..5e67fdc88f49 100644 --- a/drivers/regulator/tps65219-regulator.c +++ b/drivers/regulator/tps65219-regulator.c @@ -436,46 +436,46 @@ static int tps65219_regulator_probe(struct platform_device *pdev) pmic->rdesc[i].name); } - irq_data = devm_kmalloc(tps->dev, pmic->common_irq_size, GFP_KERNEL); - if (!irq_data) - return -ENOMEM; - for (i = 0; i < pmic->common_irq_size; ++i) { irq_type = &pmic->common_irq_types[i]; irq = platform_get_irq_byname(pdev, irq_type->irq_name); if (irq < 0) return -EINVAL; - irq_data[i].dev = tps->dev; - irq_data[i].type = irq_type; + irq_data = devm_kmalloc(tps->dev, sizeof(*irq_data), GFP_KERNEL); + if (!irq_data) + return -ENOMEM; + + irq_data->dev = tps->dev; + irq_data->type = irq_type; error = devm_request_threaded_irq(tps->dev, irq, NULL, tps65219_regulator_irq_handler, IRQF_ONESHOT, irq_type->irq_name, - &irq_data[i]); + irq_data); if (error) return dev_err_probe(tps->dev, PTR_ERR(rdev), "Failed to request %s IRQ %d: %d\n", irq_type->irq_name, irq, error); } - irq_data = devm_kmalloc(tps->dev, pmic->dev_irq_size, GFP_KERNEL); - if (!irq_data) - return -ENOMEM; - for (i = 0; i < pmic->dev_irq_size; ++i) { irq_type = &pmic->irq_types[i]; irq = platform_get_irq_byname(pdev, irq_type->irq_name); if (irq < 0) return -EINVAL; - irq_data[i].dev = tps->dev; - irq_data[i].type = irq_type; + irq_data = devm_kmalloc(tps->dev, sizeof(*irq_data), GFP_KERNEL); + if (!irq_data) + return -ENOMEM; + + irq_data->dev = tps->dev; + irq_data->type = irq_type; error = devm_request_threaded_irq(tps->dev, irq, NULL, tps65219_regulator_irq_handler, IRQF_ONESHOT, irq_type->irq_name, - &irq_data[i]); + irq_data); if (error) return dev_err_probe(tps->dev, PTR_ERR(rdev), "Failed to request %s IRQ %d: %d\n", -- 2.50.1