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commit 37f32f52643869131ec01bb69bdf9f404f6109fb upstream. On failure to parse parameters in ovl_parse_param_lowerdir(), it is necessary to update ctx->nr with the correct nr before using ovl_reset_lowerdirs() to release l->name. Reported-and-tested-by: syzbot+26eedf3631650972f17c@syzkaller.appspotmail.com Fixes: c835110b588a ("ovl: remove unused code in lowerdir param parsing") Co-authored-by: Edward Adam Davis <eadavis@qq.com> Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.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.