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fix(ems): avoid abort in gc_migrate when heap metadata is corrupted #4862

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Merged
lum1n0us merged 1 commit into from
Mar 5, 2026
+4 −6
Merged

fix(ems): avoid abort in gc_migrate when heap metadata is corrupted #4862

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10 changes: 4 additions & 6 deletions core/shared/mem-alloc/ems/ems_kfc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -286,13 +286,13 @@ gc_migrate(gc_handle_t handle, char *pool_buf_new, gc_size_t pool_buf_size)
while (cur < end) {
size = hmu_get_size(cur);

#if BH_ENABLE_GC_CORRUPTION_CHECK != 0
if (size <= 0 || size > (uint32)((uint8 *)end - (uint8 *)cur)) {
LOG_ERROR("[GC_ERROR]Heap is corrupted, heap migrate failed.\n");
#if BH_ENABLE_GC_CORRUPTION_CHECK != 0
heap->is_heap_corrupted = true;
#endif
return GC_ERROR;
}
#endif

if (hmu_get_ut(cur) == HMU_FC && !HMU_IS_FC_NORMAL(size)) {
tree_node = (hmu_tree_node_t *)cur;
Expand All @@ -315,15 +315,13 @@ gc_migrate(gc_handle_t handle, char *pool_buf_new, gc_size_t pool_buf_size)
cur = (hmu_t *)((char *)cur + size);
}

#if BH_ENABLE_GC_CORRUPTION_CHECK != 0
if (cur != end) {
LOG_ERROR("[GC_ERROR]Heap is corrupted, heap migrate failed.\n");
#if BH_ENABLE_GC_CORRUPTION_CHECK != 0
heap->is_heap_corrupted = true;
#endif
return GC_ERROR;
}
#else
bh_assert(cur == end);
#endif

return 0;
}
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