1442ee0011
Kunkun Jiang reported that there is a small window of opportunity for
userspace to force a change of affinity for a VPE while the VPE has already
been unmapped, but the corresponding doorbell interrupt still visible in
/proc/irq/.
Plug the race by checking the value of vmapp_count, which tracks whether
the VPE is mapped ot not, and returning an error in this case.
This involves making vmapp_count common to both GICv4.1 and its v4.0
ancestor.
Fixes: 64edfaa9a234 ("irqchip/gic-v4.1: Implement the v4.1 flavour of VMAPP")
Reported-by: Kunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/c182ece6-2ba0-ce4f-3404-dba7a3ab6c52@huawei.com
Link: https://lore.kernel.org/all/20241002204959.2051709-1-maz@kernel.org
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|---|---|---|
| .. | ||
| arm-gic-common.h | ||
| arm-gic-v3-prio.h | ||
| arm-gic-v3.h | ||
| arm-gic-v4.h | ||
| arm-gic.h | ||
| arm-vgic-info.h | ||
| arm-vic.h | ||
| chained_irq.h | ||
| irq-bcm2836.h | ||
| irq-davinci-aintc.h | ||
| irq-davinci-cp-intc.h | ||
| irq-madera.h | ||
| irq-omap-intc.h | ||
| irq-partition-percpu.h | ||
| irq-sa11x0.h | ||
| riscv-aplic.h | ||
| riscv-imsic.h | ||
| xtensa-mx.h | ||
| xtensa-pic.h | ||