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Open Source and information security mailing list archives
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Date: Sun, 2 Aug 2020 22:26:16 +0800 From: Jia-Ju Bai <baijiaju@...nghua.edu.cn> To: jiri@...nulli.us, davem@...emloft.net, kuba@...nel.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [BUG] net: rocker: accessing the data mapped to streaming DMA In rocker_dma_test_offset(), "buf" is mapped to streaming DMA on line 203: dma_handle = pci_map_single(..., buf, ...); Then, "buf" is accessed on line 229: expect[i] = ~buf[i]; This access may cause data inconsistency between CPU cache and hardware. I am not sure how to properly fix this problem, and thus I only report it. Best wishes, Jia-Ju Bai
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