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%
4a365eb8a6
When kernel has pending uretprobes installed, it hijacks original user function return address on the stack with a uretprobe trampoline address. There could be multiple such pending uretprobes (either on different user functions or on the same recursive one) at any given time within the same task. This approach interferes with the user stack trace capture logic, which would report suprising addresses (like 0x7fffffffe000) that correspond to a special "[uprobes]" section that kernel installs in the target process address space for uretprobe trampoline code, while logically it should be an address somewhere within the calling function of another traced user function. This is easy to correct for, though. Uprobes subsystem keeps track of pending uretprobes and records original return addresses. This patch is using this to do a post-processing step and restore each trampoline address entries with correct original return address. This is done only if there are pending uretprobes for current task. This is a similar approach to what fprobe/kretprobe infrastructure is doing when capturing kernel stack traces in the presence of pending return probes. Link: https://lore.kernel.org/all/20240522013845.1631305-3-andrii@kernel.org/ Reported-by: Riham Selim <rihams@meta.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@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.