mirror of https://gitee.com/openkylin/linux.git
e75dc036c4
The kernel needs to validate that the contents of struct siginfo make sense as siginfo is copied into the kernel, so that the proper union members can be put in the appropriate locations. The field si_signo is a fundamental part of that validation. As such changing the contents of si_signo after the validation make no sense and can result in nonsense values in the kernel. As such simply fail if someone is silly enough to set si_signo out of sync with the signal number passed to sigqueueinfo. I don't expect a problem as glibc's sigqueue implementation sets "si_signo = sig" and CRIU just returns to the kernel what the kernel gave to it. If there is some application that calls sigqueueinfo directly that has a problem with this added sanity check we can revisit this when we see what kind of crazy that application is doing. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
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.