From: Guanrui Huang guanrui.huang@linux.alibaba.com
stable inclusion from stable-v5.10.216 commit aa44d21574751a7d6bca892eb8e0e9ac68372e52 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9HX CVE: CVE-2024-35847
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit c26591afd33adce296c022e3480dea4282b7ef91 upstream.
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: 7d75bbb4bc1a ("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... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Liu Mingrui liumingrui@huawei.com --- drivers/irqchip/irq-gic-v3-its.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 71e1689a32e7..1f157bf54ce1 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -3509,13 +3509,8 @@ static int its_vpe_irq_domain_alloc(struct irq_domain *domain, unsigned int virq set_bit(i, bitmap); }
- if (err) { - if (i > 0) - its_vpe_irq_domain_free(domain, virq, i); - - its_lpi_free(bitmap, base, nr_ids); - its_free_prop_table(vprop_page); - } + if (err) + its_vpe_irq_domain_free(domain, virq, i);
return err; }