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The fput() of file rcS might not have completed causing issues when executing the file. rcS is opened in do_populate_rootfs before executed. At the end of do_populate_rootfs() flush_delayed_fput() is called. Now do_populate_rootfs() assumes that all fput()s caused by do_populate_rootfs() have completed. But flush_delayed_fput() can only ensure that fput() on the current delayed_fput_list has finished. Any file that has been removed from delayed_fput_list asynchronously in the meantime might not have completed causing the exec to fail. do_populate_rootfs delayed_fput_list delayed_fput execve fput() a fput() a->b fput() a->b->rcS __fput(a) fput() c fput() c->d __fput(b) flush_delayed_fput __fput(c) __fput(d) __fput(b) __fput(b) execve(rcS) Ensure that all delayed work is done by calling flush_delayed_work() in flush_delayed_fput() explicitly. Signed-off-by: Chen Lin <chen.lin5@zte.com.cn> Signed-off-by: Shao Mingyin <shao.mingyin@zte.com.cn> Link: https://lore.kernel.org/r/20241023135850067m3w2R0UXESiVCYz_wdAoT@zte.com.cn Cc: Yang Yang <yang.yang29@zte.com.cn> Cc: Yang Tao <yang.tao172@zte.com.cn> Cc: Xu Xin <xu.xin16@zte.com.cn> [brauner: rewrite commit message] Signed-off-by: Christian Brauner <brauner@kernel.org> |
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| 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 | ||
| .clippy.toml | ||
| .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.