Commit 2f7caf6b authored Jan 07, 2018 by Gilad Ben-Yossef Committed by Greg Kroah-Hartman Jan 08, 2018

staging: ccree: check DMA pool buf !NULL before free



If we ran out of DMA pool buffers, we get into the unmap
code path with a NULL before. Deal with this by checking
the virtual mapping is not NULL.

Cc: stable@vger.kernel.org
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 5ced2664

drivers/staging/ccree/ssi_buffer_mgr.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -465,7 +465,8 @@ void cc_unmap_blkcipher_request(struct device dev, void ctx,
		DMA_TO_DEVICE);
		}
		/* Release pool */
		if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
		if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI &&
		req_ctx->mlli_params.mlli_virt_addr) {
		dma_pool_free(req_ctx->mlli_params.curr_pool,
		req_ctx->mlli_params.mlli_virt_addr,
		req_ctx->mlli_params.mlli_dma_addr);

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