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Carlos Llamas
7ce2c7dd28
commit63a694c51bupstream. Commit0a3fe972a7("HID: core: Mitigate potential OOB by removing bogus memset()"), added a check in hid_report_raw_event() to reject reports if the received data size is smaller than expected. This was intended to prevent OOB errors by no longer allowing zeroing-out of shorter reports due to the lack of buffer size information. However, this leads to regressions in hid_report_raw_event(), where shorter than expected reports are rejected, even though their buffers are sufficiently large to be zero-padded. To solve this issue, Benjamin introduced a safer alternative in commit206342541f("HID: core: introduce hid_safe_input_report()"), which forwards the buffer size and allows hid_report_raw_event() to safely zero-pad the data. Convert uhid to use hid_safe_input_report() and pass UHID_DATA_MAX as the buffer size. This prevents the reported regressions [1], allowing hid core to zero-pad the shorter reports safely as expected. Cc: stable@vger.kernel.org Fixes:0a3fe972a7("HID: core: Mitigate potential OOB by removing bogus memset()") Closes: https://lore.kernel.org/all/ahsh0UtTX6e0ZeHa@google.com/ [1] Signed-off-by: Carlos Llamas <cmllamas@google.com> Reviewed-by: Lee Jones <lee@kernel.org> Closes: https://lore.kernel.org/all/ahsh0UtTX6e0ZeHa@google.com/ Signed-off-by: Jiri Kosina <jkosina@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 reStructuredText 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.