mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-11-10 20:48:12 +00:00
No description
- C 96.8%
- Assembly 0.9%
- Rust 0.7%
- Shell 0.6%
- Python 0.5%
- Other 0.3%
bfafe5efa9
Previously, seccomp filters were released in release_task(), which required the process to exit and its zombie to be collected. However, exited threads/processes can't trigger any seccomp events, making it more logical to release filters upon task exits. This adjustment simplifies scenarios where a parent is tracing its child process. The parent process can now handle all events from a seccomp listening descriptor and then call wait to collect a child zombie. seccomp_filter_release takes the siglock to avoid races with seccomp_sync_threads. There was an idea to bypass taking the lock by checking PF_EXITING, but it can be set without holding siglock if threads have SIGNAL_GROUP_EXIT. This means it can happen concurently with seccomp_filter_release. This change also fixes another minor problem. Suppose that a group leader installs the new filter without SECCOMP_FILTER_FLAG_TSYNC, exits, and becomes a zombie. Without this change, SECCOMP_FILTER_FLAG_TSYNC from any other thread can never succeed, seccomp_can_sync_threads() will check a zombie leader and is_ancestor() will fail. Reviewed-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrei Vagin <avagin@google.com> Link: https://lore.kernel.org/r/20240628021014.231976-3-avagin@google.com Reviewed-by: Tycho Andersen <tandersen@netflix.com> Signed-off-by: Kees Cook <kees@kernel.org> |
History
|
|
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.