mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Gui-Dong Han
187c8be0c4
[ Upstream commit7215e4552f] Passing NULL to debugfs_create_str() causes a NULL pointer dereference, and creating debugfs nodes with NULL string pointers is no longer permitted. Additionally, firmware_file is a global pointer. Previously, adding every new slave blindly overwrote it with NULL. Fix these issues by initializing firmware_file to an allocated empty string once in the subsystem init path (sdw_debugfs_init), and freeing it in the exit path. Existing driver code handles empty strings correctly. Fixes:fe46d2a430("soundwire: debugfs: add interface to read/write commands") Reported-by: yangshiguang <yangshiguang@xiaomi.com> Closes: https://lore.kernel.org/lkml/17647e4c.d461.19b46144a4e.Coremail.yangshiguang1011@163.com/ Signed-off-by: Gui-Dong Han <hanguidong02@gmail.com> Link: https://patch.msgid.link/20260323085930.88894-4-hanguidong02@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@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 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.