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Merge tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

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Pull IOMMU fix from Joerg Roedel:
 "Fix a NULL-pointer dereference issue in the ACPI device matching code
  of the AMD IOMMU driver"

* tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix NULL dereference bug in match_hid_uid
This commit is contained in:
Linus Torvalds
2019-03-15 14:41:30 -07:00
parent 0be2886307 bb6bccba39
commit 323ea40ff6
1 changed files with 6 additions and 2 deletions
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8
drivers/iommu/amd_iommu.c
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@@ -140,10 +140,14 @@ static struct lock_class_key reserved_rbtree_key;
static inline int match_hid_uid(struct device *dev,
struct acpihid_map_entry *entry)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
const char *hid, *uid;
hid = acpi_device_hid(ACPI_COMPANION(dev));
uid = acpi_device_uid(ACPI_COMPANION(dev));
if (!adev)
return -ENODEV;
hid = acpi_device_hid(adev);
uid = acpi_device_uid(adev);
if (!hid || !(*hid))
return -ENODEV;