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Kuen-Han Tsai be5738d19b usb: legacy: ncm: Fix NPE in gncm_bind commit `fde0634ad9` upstream. Commit `56a512a9b4` ("usb: gadget: f_ncm: align net_device lifecycle with bind/unbind") deferred the allocation of the net_device. This change leads to a NULL pointer dereference in the legacy NCM driver as it attempts to access the net_device before it's fully instantiated. Store the provided qmult, host_addr, and dev_addr into the struct ncm_opts->net_opts during gncm_bind(). These values will be properly applied to the net_device when it is allocated and configured later in the binding process by the NCM function driver. Fixes: `56a512a9b4` ("usb: gadget: f_ncm: align net_device lifecycle with bind/unbind") Cc: stable@kernel.org Reported-by: kernel test robot <oliver.sang@intel.com> Closes: https://lore.kernel.org/oe-lkp/202602181727.fd76c561-lkp@intel.com Signed-off-by: Kuen-Han Tsai <khtsai@google.com> Link: https://patch.msgid.link/20260221-legacy-ncm-v2-1-dfb891d76507@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2026-03-19 16:08:28 +01:00
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README

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.