[PATCH] irqchip/riscv-intc: Fix memory leak when riscv_intc_init_common() fails

[PATCH] irqchip/riscv-intc: Fix memory leak when riscv_intc_init_common() fails

[Sunil V L]

When riscv_intc_init_common() fails, the firmware node allocated is not
freed. Fix this memory leak.

Fixes: 7023b9d83f03 ("irqchip/riscv-intc: Add ACPI support")
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
---
 drivers/irqchip/irq-riscv-intc.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 9e71c4428814..4f3a12383a1e 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -253,8 +253,9 @@ IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
 static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
 				       const unsigned long end)
 {
-	struct fwnode_handle *fn;
 	struct acpi_madt_rintc *rintc;
+	struct fwnode_handle *fn;
+	int rc;
 
 	rintc = (struct acpi_madt_rintc *)header;
 
@@ -273,7 +274,11 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
 		return -ENOMEM;
 	}
 
-	return riscv_intc_init_common(fn, &riscv_intc_chip);
+	rc = riscv_intc_init_common(fn, &riscv_intc_chip);
+	if (rc)
+		irq_domain_free_fwnode(fn);
+
+	return rc;
 }
 
 IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,
-- 
2.40.1

Re: [PATCH] irqchip/riscv-intc: Fix memory leak when riscv_intc_init_common() fails

[Anup Patel]

On Mon, May 27, 2024 at 1:41 PM Sunil V L <sunilvl@ventanamicro.com> wrote:
>
> When riscv_intc_init_common() fails, the firmware node allocated is not
> freed. Fix this memory leak.
>
> Fixes: 7023b9d83f03 ("irqchip/riscv-intc: Add ACPI support")
> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>

LGTM.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

> ---
>  drivers/irqchip/irq-riscv-intc.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
> index 9e71c4428814..4f3a12383a1e 100644
> --- a/drivers/irqchip/irq-riscv-intc.c
> +++ b/drivers/irqchip/irq-riscv-intc.c
> @@ -253,8 +253,9 @@ IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
>  static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
>                                        const unsigned long end)
>  {
> -       struct fwnode_handle *fn;
>         struct acpi_madt_rintc *rintc;
> +       struct fwnode_handle *fn;
> +       int rc;
>
>         rintc = (struct acpi_madt_rintc *)header;
>
> @@ -273,7 +274,11 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
>                 return -ENOMEM;
>         }
>
> -       return riscv_intc_init_common(fn, &riscv_intc_chip);
> +       rc = riscv_intc_init_common(fn, &riscv_intc_chip);
> +       if (rc)
> +               irq_domain_free_fwnode(fn);
> +
> +       return rc;
>  }
>
>  IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,
> --
> 2.40.1
>

[tip: irq/urgent] irqchip/riscv-intc: Prevent memory leak when riscv_intc_init_common() fails

[tip-bot2 for Sunil V L]

The following commit has been merged into the irq/urgent branch of tip:

Commit-ID:     0110c4b110477bb1f19b0d02361846be7ab08300
Gitweb:        https://git.kernel.org/tip/0110c4b110477bb1f19b0d02361846be7ab08300
Author:        Sunil V L <sunilvl@ventanamicro.com>
AuthorDate:    Mon, 27 May 2024 13:41:13 +05:30
Committer:     Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Mon, 03 Jun 2024 12:29:35 +02:00

irqchip/riscv-intc: Prevent memory leak when riscv_intc_init_common() fails

When riscv_intc_init_common() fails, the firmware node allocated is not
freed. Add the missing free().

Fixes: 7023b9d83f03 ("irqchip/riscv-intc: Add ACPI support")
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Anup Patel <anup@brainfault.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240527081113.616189-1-sunilvl@ventanamicro.com

---
 drivers/irqchip/irq-riscv-intc.c |  9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-riscv-intc.c b/drivers/irqchip/irq-riscv-intc.c
index 9e71c44..4f3a123 100644
--- a/drivers/irqchip/irq-riscv-intc.c
+++ b/drivers/irqchip/irq-riscv-intc.c
@@ -253,8 +253,9 @@ IRQCHIP_DECLARE(andes, "andestech,cpu-intc", riscv_intc_init);
 static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
 				       const unsigned long end)
 {
-	struct fwnode_handle *fn;
 	struct acpi_madt_rintc *rintc;
+	struct fwnode_handle *fn;
+	int rc;
 
 	rintc = (struct acpi_madt_rintc *)header;
 
@@ -273,7 +274,11 @@ static int __init riscv_intc_acpi_init(union acpi_subtable_headers *header,
 		return -ENOMEM;
 	}
 
-	return riscv_intc_init_common(fn, &riscv_intc_chip);
+	rc = riscv_intc_init_common(fn, &riscv_intc_chip);
+	if (rc)
+		irq_domain_free_fwnode(fn);
+
+	return rc;
 }
 
 IRQCHIP_ACPI_DECLARE(riscv_intc, ACPI_MADT_TYPE_RINTC, NULL,