mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-05 18:41:58 +09:00
da29cd1972
commit 5d510ac31626ed157d2182149559430350cf2104 upstream. When size equals the current i_size (including 0), the code used to call check_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1` and can underflow for size==0. Skip the equal case. Cc: stable@vger.kernel.org Reported-by: Qianchang Zhao <pioooooooooip@gmail.com> Reported-by: Zhitong Liu <liuzhitong1993@gmail.com> Signed-off-by: Qianchang Zhao <pioooooooooip@gmail.com> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.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 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.