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irqchip/irq-riscv-imsic-early: Fix fwnode leak on state setup failure

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imsic_early_acpi_init() allocates a firmware node before setting up the
IMSIC state. If imsic_setup_state() fails, the function returns without
freeing the allocated fwnode.

Free the fwnode and clear the global pointer on this error path, matching
the cleanup already done when imsic_early_probe() fails.

[ tglx: Use a common cleanup path instead of copying code around ]

Fixes: fbe826b1c1 ("irqchip/riscv-imsic: Add ACPI support")
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260623073744.2009137-1-haoxiang_li2024@163.com
This commit is contained in:
Haoxiang Li 2026-06-23 15:37:44 +08:00 committed by Thomas Gleixner
parent dc59e4fea9
commit 1358126fbe
1 changed files with 8 additions and 7 deletions
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15
drivers/irqchip/irq-riscv-imsic-early.c
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@ -272,16 +272,13 @@ static int __init imsic_early_acpi_init(union acpi_subtable_headers *header,
rc = imsic_setup_state(imsic_acpi_fwnode, imsic);
if (rc) {
pr_err("%pfwP: failed to setup state (error %d)\n", imsic_acpi_fwnode, rc);
return rc;
goto cleanup;
}
/* Do early setup of IMSIC state and IPIs */
rc = imsic_early_probe(imsic_acpi_fwnode);
if (rc) {
irq_domain_free_fwnode(imsic_acpi_fwnode);
imsic_acpi_fwnode = NULL;
return rc;
}
if (rc)
goto cleanup;
rc = imsic_platform_acpi_probe(imsic_acpi_fwnode);
@ -300,8 +297,12 @@ static int __init imsic_early_acpi_init(union acpi_subtable_headers *header,
* DT where IPI works but MSI probe fails for some reason.
*/
return 0;
}
cleanup:
irq_domain_free_fwnode(imsic_acpi_fwnode);
imsic_acpi_fwnode = NULL;
return rc;
}
IRQCHIP_ACPI_DECLARE(riscv_imsic, ACPI_MADT_TYPE_IMSIC, NULL,
1, imsic_early_acpi_init);
#endif