iommu/amd: Convert from atomic_t to refcount_t on pasid_state->count

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refcount_t type and corresponding API can protect refcounters from
accidental underflow and overflow and further use-after-free situations.

Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/1626683578-64214-1-git-send-email-xiyuyang19@fudan.edu.cn
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Xiyu Yang via iommu 2021-07-19 16:32:58 +08:00 • committed by Joerg Roedel

parent ff1176468d

commit 8bc54824da

1 changed files with 7 additions and 6 deletions

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drivers/iommu/amd/iommu_v2.c

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