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aed9529725
A compromized ath10k peripheral is able to control the size argument of memcpy in ath10k_pci_hif_exchange_bmi_msg. The min result from previous line is not used as the size argument for memcpy. Instead, xfer.resp_len comes from untrusted stream dma input. The value comes from "nbytes" in ath10k_pci_bmi_recv_data, which is set inside _ath10k_ce_completed_recv_next_nolock with the line nbytes = __le16_to_cpu(sdesc.nbytes); sdesc is a stream dma region which device can write to. Signed-off-by: Zekun Shen <bruceshenzk@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20200616132544.17478-1-bruceshenzk@gmail.com |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.