irqchip/gic-v3-its: Prevent double free on error
The error handling path in its_vpe_irq_domain_alloc() causes a double free
when its_vpe_init() fails after successfully allocating at least one
interrupt. This happens because its_vpe_irq_domain_free() frees the
interrupts along with the area bitmap and the vprop_page and
its_vpe_irq_domain_alloc() subsequently frees the area bitmap and the
vprop_page again.
Fix this by unconditionally invoking its_vpe_irq_domain_free() which
handles all cases correctly and by removing the bitmap/vprop_page freeing
from its_vpe_irq_domain_alloc().
[ tglx: Massaged change log ]
Fixes: 7d75bbb4bc
("irqchip/gic-v3-its: Add VPE irq domain allocation/teardown")
Signed-off-by: Guanrui Huang <guanrui.huang@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240418061053.96803-2-guanrui.huang@linux.alibaba.com
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@ -4567,14 +4567,9 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq
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irqd_set_resend_when_in_progress(irq_get_irq_data(virq + i));
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irqd_set_resend_when_in_progress(irq_get_irq_data(virq + i));
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}
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}
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if (err) {
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if (err)
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if (i > 0)
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its_vpe_irq_domain_free(domain, virq, i);
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its_vpe_irq_domain_free(domain, virq, i);
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its_lpi_free(bitmap, base, nr_ids);
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its_free_prop_table(vprop_page);
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}
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return err;
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return err;
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}
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}
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