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make KCFLAGS='-fanalyzer' sound/soc/sof/intel/ reports several NULL pointer dereference paths. Example log: ops = hda_dai_get_ops(substream, cpu_dai); | | ^~~~~ | | | | | (14) return of NULL to ‘non_hda_dai_hw_params’ from ‘hda_dai_get_ops’ | 353 | sdev = widget_to_sdev(w); | 354 | hext_stream = ops->get_hext_stream(sdev, cpu_dai, substream); | | ~~~~~~~~~~~~~~~~~~~~ | | | | | (15) dereference of NULL ‘ops’ The function hda_dai_get_ops() can return NULL, but the return value is not checked across the board. It's not a problem today, since we do check in the first use of the function, but static analysis tools are not aware of the different ALSA stages. Rather than argue forever, let's just add the error checks consistently and make sure this tool can be added to the CI checks. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Link: https://lore.kernel.org/r/20230602205620.310879-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.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.