diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 8c6e4e9cb53539113b965e683afef90e219c4627..b625090890e14ffbd7d026a888aa3dc09a5bd245 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -278,8 +278,12 @@ depot_alloc_stack(unsigned long *entries, int size, u32 hash, void **prealloc)
 			return NULL;
 		}
 
-		/* Move on to the next pool. */
-		pool_index++;
+		/*
+		 * Move on to the next pool.
+		 * WRITE_ONCE pairs with potential concurrent read in
+		 * stack_depot_fetch().
+		 */
+		WRITE_ONCE(pool_index, pool_index + 1);
 		pool_offset = 0;
 		/*
 		 * If the maximum number of pools is not reached, take note
@@ -502,6 +506,11 @@ unsigned int stack_depot_fetch(depot_stack_handle_t handle,
 			       unsigned long **entries)
 {
 	union handle_parts parts = { .handle = handle };
+	/*
+	 * READ_ONCE pairs with potential concurrent write in
+	 * depot_alloc_stack.
+	 */
+	int pool_index_cached = READ_ONCE(pool_index);
 	void *pool;
 	size_t offset = parts.offset << DEPOT_STACK_ALIGN;
 	struct stack_record *stack;
@@ -510,9 +519,9 @@ unsigned int stack_depot_fetch(depot_stack_handle_t handle,
 	if (!handle)
 		return 0;
 
-	if (parts.pool_index > pool_index) {
+	if (parts.pool_index > pool_index_cached) {
 		WARN(1, "pool index %d out of bounds (%d) for stack id %08x\n",
-			parts.pool_index, pool_index, handle);
+			parts.pool_index, pool_index_cached, handle);
 		return 0;
 	}
 	pool = stack_pools[parts.pool_index];