This patch is based on top of the "vfs: support for a common kernel file loader" patch set. In general when the kernel is reading a file into memory it does not want anything else writing to it. The kernel currently only forbids write access to a file being executed. This patch extends this locking to files being read by the kernel. Changelog: - moved function to kernel_read_file() - Mimi - updated patch description - Mimi Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Reviewed-by: Luis R. Rodriguez <mcgrof@kernel.org> Acked-by: Kees Cook <keescook@chromium.org>