The patch titled
arch/x86/kernel/apic/io_apic.c: fix NULL pointer for Xen guests
has been added to the -mm tree. Its filename is
arch-x86-kernel-apic-io_apicc-fix-null-pointer-for-xen-guests.patch
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------------------------------------------------------
Subject: arch/x86/kernel/apic/io_apic.c: fix NULL pointer for Xen guests
From: Prarit Bhargava <prarit@xxxxxxxxxx>
Upstream PV guests fail to boot because of a NULL pointer. It is possible
that xen guests have irq_desc->chip_data = NULL.
Test for NULL chip_data pointer before attempting to complete an irq move.
Signed-off-by: Prarit Bhargava <prarit@xxxxxxxxxx>
Acked-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/apic/io_apic.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN arch/x86/kernel/apic/io_apic.c~arch-x86-kernel-apic-io_apicc-fix-null-pointer-for-xen-guests arch/x86/kernel/apic/io_apic.c
--- a/arch/x86/kernel/apic/io_apic.c~arch-x86-kernel-apic-io_apicc-fix-null-pointer-for-xen-guests
+++ a/arch/x86/kernel/apic/io_apic.c
@@ -2545,6 +2545,9 @@ void irq_force_complete_move(int irq)
struct irq_desc *desc = irq_to_desc(irq);
struct irq_cfg *cfg = desc->chip_data;
+ if (!cfg)
+ return;
+
__irq_complete_move(&desc, cfg->vector);
}
#else
_
Patches currently in -mm which might be from prarit@xxxxxxxxxx are
arch-x86-kernel-apic-io_apicc-fix-null-pointer-for-xen-guests.patch
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