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88f65bb66d
[ Upstream commite586e22974] On a 32 bit system calling: iommu_map(0, 0x40000000) When using the AMD V1 page table type with a domain->pgsize of 0xfffff000 causes iommu_pgsize() to miscalculate a result of: size=0x40000000 count=2 count should be 1. This completely corrupts the mapping process. This is because the final test to adjust the pagesize malfunctions when the addition overflows. Use check_add_overflow() to prevent this. Fixes:b1d99dc5f9("iommu: Hook up '->unmap_pages' driver callback") Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/0-v1-3ad28fc2e3a3+163327-iommu_overflow_pgsize_jgg@nvidia.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
3610 lines
94 KiB
3610 lines
94 KiB