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| author | Srinivasan Shanmugam <srinivasan.shanmugam@amd.com> | 2024-01-09 16:57:26 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-05 20:13:00 +0000 |
| commit | 8eea7e1d69e255f98a94e17b07cfb9a6d68128af (patch) | |
| tree | a62e8aa63e66b01d037b2ce3290478b4f6461646 | |
| parent | 7513f0906c22acd6216348b1d0c3c6071c58c4d9 (diff) | |
| download | linux-stable-8eea7e1d69e255f98a94e17b07cfb9a6d68128af.tar.gz linux-stable-8eea7e1d69e255f98a94e17b07cfb9a6d68128af.tar.bz2 linux-stable-8eea7e1d69e255f98a94e17b07cfb9a6d68128af.zip | |
drm/amdkfd: Fix 'node' NULL check in 'svm_range_get_range_boundaries()'
[ Upstream commit d7a254fad873775ce6c32b77796c81e81e6b7f2e ]
Range interval [start, last] is ordered by rb_tree, rb_prev, rb_next
return value still needs NULL check, thus modified from "node" to "rb_node".
Fixes the below:
drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:2691 svm_range_get_range_boundaries() warn: can 'node' even be NULL?
Suggested-by: Philip Yang <Philip.Yang@amd.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 5188c4d2e7c0..7fa5e70f1aac 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -2553,6 +2553,7 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr, { struct vm_area_struct *vma; struct interval_tree_node *node; + struct rb_node *rb_node; unsigned long start_limit, end_limit; vma = find_vma(p->mm, addr << PAGE_SHIFT); @@ -2575,16 +2576,15 @@ svm_range_get_range_boundaries(struct kfd_process *p, int64_t addr, if (node) { end_limit = min(end_limit, node->start); /* Last range that ends before the fault address */ - node = container_of(rb_prev(&node->rb), - struct interval_tree_node, rb); + rb_node = rb_prev(&node->rb); } else { /* Last range must end before addr because * there was no range after addr */ - node = container_of(rb_last(&p->svms.objects.rb_root), - struct interval_tree_node, rb); + rb_node = rb_last(&p->svms.objects.rb_root); } - if (node) { + if (rb_node) { + node = container_of(rb_node, struct interval_tree_node, rb); if (node->last >= addr) { WARN(1, "Overlap with prev node and page fault addr\n"); return -EFAULT; |