Linux kernel modifications for the Kernel Hacking exam
0097c18e45
Posix-timers armed with a short interval with an ignored signal result in an unpriviledged DoS. Due to the ignored signal the timer switches into self rearm mode. This issue had been "fixed" before but a rework of the alarmtimer code 5 years ago lost that workaround. There is no real good solution for this issue, which is also worked around in the core posix-timer code in the same way, but it certainly moved way up on the ever growing todo list. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAmPxYIwTHHRnbHhAbGlu dXRyb25peC5kZQAKCRCmGPVMDXSYocQ5D/45vfKxvXsF0mCHPpF+Dgx96T3rzpXY aN/OeKWJ50A7IB5QKdxR3/VdDSuD6/HroFTfKTQIUVzkzAq47r7Ref7a0bgDsNbT SLTX8oBUA1ALKVew3wGo5qkY317xyGb2WPiSCzfjAZk07MplOzDRC4YYgEfnYAWW DzmzmkZQaAhKg3JONEB+kOas/E/T1MwTSs2NNJiY0hM6ATFK2+q2b706wjDHWspk QwjCfUCbrFKSxol+hSQgvQpzV18FmS328xU4Ht4pioflch0dv1/HDrml9OGrCCzs 8hEmCcjxFwM2FXTPIix8/Jn4S8ppZwYQCi10bBjjF+0N9s897s/4dom88EbfwjfB 4YpE62SI8VZIyK0JauSuRcCAfnN7BwfgL9UpS3MEgHq4K+fnydZOItBYI3Rg4JY/ hAKizX5VzBSAq/iUFC9+DFKjonOz3cCvY5xoPLPfCXukykbYfOCz1BiBqrTP7n1z /qWgDm+YvEyYNmoEqPjD5kktpHAvwGiMl6dmJJOUxaV6KNXWremykvI491oZK7fI P3eWMPhJwJV7ukjUF6Wc5ylwupsakf+x802MF03rgmajXtzxnnFATotb/21g9SSD /FYfdjS85CRArvYKuN59Yty8iMbjX4T1tRBaKgLYjpOdqgA6H6T3vmI+ShKS/FAM T92uQTZMpVm7+w== =s5VW -----END PGP SIGNATURE----- Merge tag 'timers-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fix from Thomas Gleixner: "A fix for a long standing issue in the alarmtimer code. Posix-timers armed with a short interval with an ignored signal result in an unpriviledged DoS. Due to the ignored signal the timer switches into self rearm mode. This issue had been "fixed" before but a rework of the alarmtimer code 5 years ago lost that workaround. There is no real good solution for this issue, which is also worked around in the core posix-timer code in the same way, but it certainly moved way up on the ever growing todo list" * tag 'timers-urgent-2023-02-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimer: Prevent starvation by small intervals and SIG_IGN |
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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 | ||
| .cocciconfig | ||
| .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 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.