linux-kernel - [PATCH v4 0/2] dma-mapping: Add vmap checks to dma_map

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Message-Id: <20191029213423.28949-1-keescook@chromium.org>
Date:   Tue, 29 Oct 2019 14:34:21 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Kees Cook <keescook@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        Laura Abbott <labbott@...hat.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Allison Randal <allison@...utok.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <swboyd@...omium.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Semmle Security Reports <security-reports@...mle.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/2] dma-mapping: Add vmap checks to dma_map_single()

v4: use dev_WARN_ONCE() and improve report string (gregkh, robin)
v3: https://lore.kernel.org/lkml/20191010222829.21940-1-keescook@chromium.org
v2: https://lore.kernel.org/lkml/201910041420.F6E55D29A@keescook
v1: https://lore.kernel.org/lkml/201910021341.7819A660@keescook

Duplicating patch 1 commit log:

As we've seen from USB and other areas[1], we need to always do runtime
checks for DMA operating on memory regions that might be remapped. This
adds vmap checks (similar to those already in USB but missing in other
places) into dma_map_single() so all callers benefit from the checking.

[1] https://git.kernel.org/linus/3840c5b78803b2b6cc1ff820100a74a092c40cbb

-Kees

Kees Cook (2):
  dma-mapping: Add vmap checks to dma_map_single()
  usb: core: Remove redundant vmap checks

 drivers/usb/core/hcd.c      | 8 +-------
 include/linux/dma-mapping.h | 6 ++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

-- 
2.17.1