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Kui-Feng Lee says: ==================== This issue is related to task iterators over vma. A system crash can occur when a task iterator travels through vma of tasks as the death of a task will clear the pointer to its mm, even though the task_struct is still held. As a result, an unexpected crash happens due to a null pointer. To address this problem, a reference to mm is kept on the iterator to make sure that the pointer is always valid. This patch set provides a solution for this crash by properly referencing mm on task iterators over vma. The major changes from v1 are: - Fix commit logs of the test case. - Use reverse Christmas tree coding style. - Remove unnecessary error handling for time(). v1: https://lore.kernel.org/bpf/20221216015912.991616-1-kuifeng@meta.com/ ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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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.