| author | Will Deacon <will.deacon@arm.com> | |
| Thu, 16 Jul 2015 16:50:12 +0000 (17:50 +0100) | ||
| committer | Alex Shi <alex.shi@linaro.org> | |
| Mon, 18 Apr 2016 06:46:04 +0000 (14:46 +0800) | ||
| commit | b608ba0e600ef8c701654e9947882442cec12e02 | |
| tree | a4eb6bc6b146817f5ec822214dd81695f919b186 | tree | snapshot (tar.xz tar.gz zip) |
| parent | be6db280eba56b6f5d083c58d54161a66d059abe | commit | diff |
iommu/arm-smmu: Limit 2-level strtab allocation for small SID sizes
If the StreamIDs in a system can all be resolved by a single level-2
stream table (i.e. SIDSIZE < SPLIT), then we currently get our maths
wrong and allocate the largest strtab we support, thanks to unsigned
overflow in our calculation.
This patch fixes the issue by checking the SIDSIZE explicitly when
calculating the size of our first-level stream table.
Reported-by: Matt Evans <matt.evans@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 28c8b4045b18b013e05656b493ce9a57cbf1f09a)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
If the StreamIDs in a system can all be resolved by a single level-2
stream table (i.e. SIDSIZE < SPLIT), then we currently get our maths
wrong and allocate the largest strtab we support, thanks to unsigned
overflow in our calculation.
This patch fixes the issue by checking the SIDSIZE explicitly when
calculating the size of our first-level stream table.
Reported-by: Matt Evans <matt.evans@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 28c8b4045b18b013e05656b493ce9a57cbf1f09a)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
| drivers/iommu/arm-smmu-v3.c | diff | blob | history |