This is a note to let you know that I've just added the patch titled
drm/amd/amdkfd: Fix a resource leak in svm_range_validate_and_map()
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-amdkfd-fix-a-resource-leak-in-svm_range_vali.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit aba2f0eef21c63e0287c2047a788e849cc57ded2
Author: Ramesh Errabolu <Ramesh.Errabolu@xxxxxxx>
Date: Tue Apr 30 15:24:46 2024 -0500
drm/amd/amdkfd: Fix a resource leak in svm_range_validate_and_map()
[ Upstream commit d2d3a44008fea01ec7d5a9d9ca527286be2e0257 ]
Analysis of code by Coverity, a static code analyser, has identified
a resource leak in the symbol hmm_range. This leak occurs when one of
the prior steps before it is released encounters an error.
Signed-off-by: Ramesh Errabolu <Ramesh.Errabolu@xxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 31e500859ab01..92485251247a0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -1658,7 +1658,7 @@ static int svm_range_validate_and_map(struct mm_struct *mm,
start = map_start << PAGE_SHIFT;
end = (map_last + 1) << PAGE_SHIFT;
for (addr = start; !r && addr < end; ) {
- struct hmm_range *hmm_range;
+ struct hmm_range *hmm_range = NULL;
unsigned long map_start_vma;
unsigned long map_last_vma;
struct vm_area_struct *vma;
@@ -1696,7 +1696,12 @@ static int svm_range_validate_and_map(struct mm_struct *mm,
}
svm_range_lock(prange);
- if (!r && amdgpu_hmm_range_get_pages_done(hmm_range)) {
+
+ /* Free backing memory of hmm_range if it was initialized
+ * Overrride return value to TRY AGAIN only if prior returns
+ * were successful
+ */
+ if (hmm_range && amdgpu_hmm_range_get_pages_done(hmm_range) && !r) {
pr_debug("hmm update the range, need validate again\n");
r = -EAGAIN;
}
