iommu/io-pgtable-fast: validate data before use



Return error on data allocation failure to prevent use
after free case.

Change-Id: I9d173756e277c9006220c02c209309167f179609
Signed-off-by: Shiraz Hashim <shashim@codeaurora.org>

parent ad8cf1bb

drivers/iommu/io-pgtable-fast.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -424,6 +424,9 @@ av8l_fast_alloc_pgtable(struct io_pgtable_cfg cfg, void cookie)
		struct av8l_fast_io_pgtable *data =
		av8l_fast_alloc_pgtable_data(cfg);

		if (!data)
		return NULL;

		/* restrict according to the fast map requirements */
		cfg->ias = 32;
		cfg->pgsize_bitmap = SZ_4K;