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iommu/amd: Argument page_size could be uninitialized

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Argument "page_size" passing to function "fetch_pte" could be
uninitialized if the function returns NULL

The caller "iommu_unmap_page" checks the return value but the page_size is
used outside the if block.

Signed-off-by: yzhai003@ucr.edu <yzhai003@ucr.edu>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
yzhai003@ucr.edu 2018-06-01 11:30:14 -07:00 committed by Joerg Roedel
parent 021c91791a
commit 4674686d6c
1 changed files with 2 additions and 0 deletions
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2
drivers/iommu/amd_iommu.c
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@ -1404,6 +1404,8 @@ static u64 *fetch_pte(struct protection_domain *domain,
int level; int level;
u64 *pte; u64 *pte;
*page_size = 0;
if (address > PM_LEVEL_SIZE(domain->mode)) if (address > PM_LEVEL_SIZE(domain->mode))
return NULL; return NULL;