From: Johan Hovold johan+linaro@kernel.org
stable inclusion from stable-v4.19.276 commit 525eb5cb8edfb7014711c2c87827ed17af8872fb category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6TIG1 CVE: NA
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commit e3b7ab025e931accdc2c12acf9b75c6197f1c062 upstream.
In case a newly allocated IRQ ever ends up not having any associated struct irq_data it would not even be possible to dispose the mapping.
Replace the bogus disposal with a WARN_ON().
This will also be used to fix a shared-interrupt mapping race, hence the CC-stable tag.
Fixes: 1e2a7d78499e ("irqdomain: Don't set type when mapping an IRQ") Cc: stable@vger.kernel.org # 4.8 Tested-by: Hsin-Yi Wang hsinyi@chromium.org Tested-by: Mark-PK Tsai mark-pk.tsai@mediatek.com Signed-off-by: Johan Hovold johan+linaro@kernel.org Signed-off-by: Marc Zyngier maz@kernel.org Link: https://lore.kernel.org/r/20230213104302.17307-4-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- kernel/irq/irqdomain.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index df2fc1dbd7fa..89f704ba2e6b 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -832,13 +832,8 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec) }
irq_data = irq_get_irq_data(virq); - if (!irq_data) { - if (irq_domain_is_hierarchy(domain)) - irq_domain_free_irqs(virq, 1); - else - irq_dispose_mapping(virq); + if (WARN_ON(!irq_data)) return 0; - }
/* Store trigger type */ irqd_set_trigger_type(irq_data, type);