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[ Upstream commit8c72242455] kstrdup() returns NULL when some internal memory errors happen, it is better to check the return value of it so to catch the memory error in time. Link: https://lkml.kernel.org/r/tencent_3C2E330722056D7891D2C83F29C802734B06@qq.com Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Fixes:33ea4b2427("perf/core: Implement the 'perf_uprobe' PMU") Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.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 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.