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| author | Eric Huang <jinhuieric.huang@amd.com> | 2026-06-17 14:42:48 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-07-01 11:39:29 -0400 |
| commit | aa7e29cf9a37092cf5057a612ee09f28df20258f (patch) | |
| tree | 808e50028d1f1e24efd3ef9bf717d92f8dd7366b | |
| parent | 6e03e0b1abc2338bd815a861c054434c6806a7b7 (diff) | |
| download | linux-aa7e29cf9a37092cf5057a612ee09f28df20258f.tar.gz linux-aa7e29cf9a37092cf5057a612ee09f28df20258f.zip | |
drm/amdkfd: add sanity check in svm_range_is_valid
to prevent svm range to be overflow or underflow.
Signed-off-by: Eric Huang <jinhuieric.huang@amd.com>
Reviewed-by: Philip Yang <philip.yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 0900bb23349e..30ad10bbd47e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -3473,7 +3473,13 @@ svm_range_is_valid(struct kfd_process *p, uint64_t start, uint64_t size) unsigned long start_unchg = start; start <<= PAGE_SHIFT; - end = start + (size << PAGE_SHIFT); + + if (size == 0) + return -EINVAL; + + if (check_add_overflow(start, size << PAGE_SHIFT, &end)) + return -EOVERFLOW; + do { vma = vma_lookup(p->mm, start); if (!vma || (vma->vm_flags & device_vma)) |