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iommu/amd: Fix pci_segment memleak in alloc_pci_segment()

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commit 75ba146c2674ba49ed8a222c67f9abfb4a4f2a4f upstream.

Fix a memory leak of struct amd_iommu_pci_segment in alloc_pci_segment()
when system memory (or contiguous memory) is insufficient.

Fixes: 04230c1199 ("iommu/amd: Introduce per PCI segment device table")
Fixes: eda797a277 ("iommu/amd: Introduce per PCI segment rlookup table")
Fixes: 99fc4ac3d2 ("iommu/amd: Introduce per PCI segment alias_table")
Cc: stable@vger.kernel.org
Signed-off-by: Jinhui Guo <guojinhui.liam@bytedance.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jinhui Guo
2025-10-28 00:50:17 +08:00
committed by Greg Kroah-Hartman
parent 17ec295d39
commit b3e9fa847b
1 changed files with 12 additions and 3 deletions
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15
drivers/iommu/amd/init.c
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@@ -1666,13 +1666,22 @@ static struct amd_iommu_pci_seg *__init alloc_pci_segment(u16 id,
list_add_tail(&pci_seg->list, &amd_iommu_pci_seg_list);
if (alloc_dev_table(pci_seg))
return NULL;
goto err_free_pci_seg;
if (alloc_alias_table(pci_seg))
return NULL;
goto err_free_dev_table;
if (alloc_rlookup_table(pci_seg))
return NULL;
goto err_free_alias_table;
return pci_seg;
err_free_alias_table:
free_alias_table(pci_seg);
err_free_dev_table:
free_dev_table(pci_seg);
err_free_pci_seg:
list_del(&pci_seg->list);
kfree(pci_seg);
return NULL;
}
static struct amd_iommu_pci_seg *__init get_pci_segment(u16 id,