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ANDROID: KVM: arm64: Fix pKVM alloc get_free_chunk

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Due to the best_available_size variable not being set on the first found
chunk, the function would not return the most optimal chunk if this
chunk is the first one from the list.

Bug: 414541590
Bug: 357781595
Bug: 273748186
Fixes: 08477328e7 ("ANDROID: KVM: arm64: Add a heap allocator for the pKVM hyp")
Reported-by: Hiroyuki Katsura <hk590@cam.ac.uk>
Change-Id: I96f3ce6c48cded5102b0973e004779842e252e58
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
This commit is contained in:
Vincent Donnefort
2025-04-29 10:56:03 +01:00
parent b85da1afd8
commit c42b25f272
1 changed files with 1 additions and 6 deletions
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arch/arm64/kvm/hyp/nvhe/alloc.c
+1 -6
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@@ -523,7 +523,7 @@ static struct chunk_hdr *
get_free_chunk(struct hyp_allocator *allocator, size_t size)
{
struct chunk_hdr *chunk, *best_chunk = NULL;
size_t best_available_size = allocator->size;
size_t best_available_size = SIZE_MAX;
list_for_each_entry(chunk, &allocator->chunks, node) {
size_t available_size = chunk->mapped_size +
@@ -534,11 +534,6 @@ get_free_chunk(struct hyp_allocator *allocator, size_t size)
if (chunk_size(size) > available_size)
continue;
if (!best_chunk) {
best_chunk = chunk;
continue;
}
if (best_available_size <= available_size)
continue;