forked from luck/tmp_suning_uos_patched
IB/iser: Fix use after free in iser_snd_completion()
We use "tx_desc" again after we free it. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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@ -610,11 +610,12 @@ void iser_snd_completion(struct iser_tx_desc *tx_desc,
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ib_dma_unmap_single(device->ib_device, tx_desc->dma_addr,
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ISER_HEADERS_LEN, DMA_TO_DEVICE);
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kmem_cache_free(ig.desc_cache, tx_desc);
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tx_desc = NULL;
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}
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atomic_dec(&ib_conn->post_send_buf_count);
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if (tx_desc->type == ISCSI_TX_CONTROL) {
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if (tx_desc && tx_desc->type == ISCSI_TX_CONTROL) {
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/* this arithmetic is legal by libiscsi dd_data allocation */
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task = (void *) ((long)(void *)tx_desc -
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sizeof(struct iscsi_task));
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