staging: ccree: check DMA pool buf !NULL before free
commit 2f7caf6b02
upstream.
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: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
parent
61377bc808
commit
8e6173c124
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@ -492,7 +492,8 @@ void ssi_buffer_mgr_unmap_blkcipher_request(
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DMA_TO_DEVICE);
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DMA_TO_DEVICE);
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}
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}
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/* Release pool */
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/* Release pool */
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if (req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI) {
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if (req_ctx->dma_buf_type == SSI_DMA_BUF_MLLI &&
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req_ctx->mlli_params.mlli_virt_addr) {
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dma_pool_free(req_ctx->mlli_params.curr_pool,
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dma_pool_free(req_ctx->mlli_params.curr_pool,
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req_ctx->mlli_params.mlli_virt_addr,
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req_ctx->mlli_params.mlli_virt_addr,
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req_ctx->mlli_params.mlli_dma_addr);
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req_ctx->mlli_params.mlli_dma_addr);
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