iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init()

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When ir_dev_scope_init() is called via a rootfs initcall it
will check for irq_remapping_enabled before it calls
(indirectly) into dmar_acpi_dev_scope_init() which uses the
dmar_tbl pointer without any checks.

The AMD IOMMU driver also sets the irq_remapping_enabled
flag which causes the dmar_acpi_dev_scope_init() function to
be called on systems with AMD IOMMU hardware too, causing a
boot-time kernel crash.

Signed-off-by: Joerg Roedel <joro@8bytes.org>

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This commit is contained in:

Joerg Roedel 2014-03-25 20:16:40 +01:00

parent cf04eee8bf

commit 11f1a7768c

1 changed files with 6 additions and 1 deletions

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7

drivers/iommu/dmar.c

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