[RESEND PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

(Previous patch was broken, sorry. Resending with another mailer.) In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash.

Re: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

* Tomoki Sekiyama wrote: > In current Linux, percpu variable `vector_irq' is not always cleared when > a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is > hotplugged again, __setup_vector_irq() hits invalid irq vector and may > crash. > > This bug can be reproduced as

[PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. This bug can be reproduced as following; # echo 0 >

Re: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Hi, thanks for your comment. On 2012/07/26 8:28, Siddha, Suresh B wrote: > Tomoki wrote: >> In current Linux, percpu variable `vector_irq' is not always cleared when >> a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is >> hotplugged again, __setup_vector_irq() hits invalid

Re: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Hi, thanks for your comment. On 2012/07/26 8:28, Siddha, Suresh B wrote: Tomoki wrote: In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq

[PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. This bug can be reproduced as following; # echo 0

Re: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

* Tomoki Sekiyama tomoki.sekiyama...@hitachi.com wrote: In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. This

[RESEND PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

(Previous patch was broken, sorry. Resending with another mailer.) In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash.

RE: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Tomoki wrote: > In current Linux, percpu variable `vector_irq' is not always cleared when > a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is > hotplugged again, __setup_vector_irq() hits invalid irq vector and may > crash. > > Commit f6175f5bfb4c partially fixes this, but

[PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Hi, In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. Commit f6175f5bfb4c partially fixes this, but was not enough in

RE: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Tomoki wrote: In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. Commit f6175f5bfb4c partially fixes this, but was

[PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs

Hi, In current Linux, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. Commit f6175f5bfb4c partially fixes this, but was not enough in