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commit6a567e920fupstream. Fuse shouldn't return ENOSYS from its ioctl implementation. If userspace responds with ENOSYS it should be translated to ENOTTY. There are two ways to return an error from the IOCTL request: - fuse_out_header.error - fuse_ioctl_out.result Commit02c0cab8e7("fuse: ioctl: translate ENOSYS") already fixed this issue for the first case, but missed the second case. This patch fixes the second case. Reported-by: Jonathan Katz <jkatz@eitmlabs.org> Closes: https://lore.kernel.org/all/CALKgVmcC1VUV_gJVq70n--omMJZUb4HSh_FqvLTHgNBc+HCLFQ@mail.gmail.com/ Fixes:02c0cab8e7("fuse: ioctl: translate ENOSYS") Cc: <stable@vger.kernel.org> Signed-off-by: Miklos Szeredi <mszeredi@redhat.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.