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The first two fixes are workarounds for buggy IPMI hardware. The hardware says it has data for the IPMI driver to read constantly, so the driver reads the data constantly, causing any new requests to be blocked. The first fix was to check for invalid data right when the data was read from the device and stop the operation there (there was a later check for invalid data, but it could not stop the operation at that point). It turned out the device was providing good data, so that didn't fix the issue, but it's still a good check. The second fix stops fetching this data after a few fetches and allows other operations to occur. The driver won't work very well, but at least it won't wedge. This seems to fix the issue. The third issue is a problem I spotted while working on the previous issue where if a certain memory allocation failed the driver would stop working. The fourth issue is a problem was a missing set to NULL on a PTR_ERR() return, introduced in the previous series for 7.1. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE/Q1c5nzg9ZpmiCaGYfOMkJGb/4EFAmn4yl8ACgkQYfOMkJGb /4GWBw//Wt/Kqafokay7ke1t0O0SvJXljdOCPPQp159QiRlXhukxl/G3dxtecCJw 8oZb5fazuiYOaBllATt7vLa+0fKK7oJFNuRXnYqTggrX8RRkcLQVpt3S1MBIofwk gDeDKvw4TJcbvLfmGLtEnl/p37FddNHTS4rvtpynaqOmfHfq/3MiXPYYqLjOiGPG EiH89viNZspiSlhAl3iMPXWkkVlW72r9kVn+YASDgL2+z5C+qZPA+Us0fxpVw02n qwHBW39RgbhS3uRKnveDSoUm8VIr7/brp14ph6m2YlNxAnZQtyG5Ul8s3NCneQFJ zr8HrTnl6gAl7SKYliOJXKpGGmpzwDKnqGnnh9IIaQAJZnblNhCsGM2oLw/d0ySe O3pxvpyVN1ETPgv7NubDxlRTfc+XuX8soCQq3KSyj2gj700+NKW4CSAZHSLj7xW2 95JTsWFcUDWFi8fpc/p1PX7rgnB1KAWVQWdOWleUuQValeUjNpBdl5Yn34fqbVDG DAYlkzXWXpszynfd3QxiwAUlYEeTyue+UZf8plVR+Gw3OwN3fGbFCBZOcVD4S8aA w6ihk5eWR05dP2JgPBv9IxDHt+kY6/2o2qQEFow/0nYZIJGZI1IQPBWZi5ux7ygB Cduro3EkzqkP9t42zavhWMxYagtpqyUOhuLFkWEZlMrdB2hNAVA= =jA6/ -----END PGP SIGNATURE----- Merge tag 'for-linus-7.1-2' of https://github.com/cminyard/linux-ipmi Pull IPMI fixes from Corey Minyard: "Fix a number of issues that came up recently The first two fixes are workarounds for buggy IPMI hardware. The hardware says it has data for the IPMI driver to read constantly, so the driver reads the data constantly, causing any new requests to be blocked. The first fix was to check for invalid data right when the data was read from the device and stop the operation there (there was a later check for invalid data, but it could not stop the operation at that point). It turned out the device was providing good data, so that didn't fix the issue, but it's still a good check. The second fix stops fetching this data after a few fetches and allows other operations to occur. The driver won't work very well, but at least it won't wedge. This seems to fix the issue. The third issue is a problem I spotted while working on the previous issue where if a certain memory allocation failed the driver would stop working. The fourth issue is a problem was a missing set to NULL on a PTR_ERR() return, introduced in the previous series for 7.1" * tag 'for-linus-7.1-2' of https://github.com/cminyard/linux-ipmi: ipmi:ssif: NULL thread on error ipmi:si: Return state to normal if message allocation fails ipmi: Add limits to event and receive message requests ipmi: Check event message buffer response for bad data |
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Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. Quick Start ----------- * Report a bug: See Documentation/admin-guide/reporting-issues.rst * Get the latest kernel: https://kernel.org * Build the kernel: See Documentation/admin-guide/quickly-build-trimmed-linux.rst * Join the community: https://lore.kernel.org/ Essential Documentation ----------------------- All users should be familiar with: * Building requirements: Documentation/process/changes.rst * Code of Conduct: Documentation/process/code-of-conduct.rst * License: See COPYING Documentation can be built with make htmldocs or viewed online at: https://www.kernel.org/doc/html/latest/ Who Are You? ============ Find your role below: * New Kernel Developer - Getting started with kernel development * Academic Researcher - Studying kernel internals and architecture * Security Expert - Hardening and vulnerability analysis * Backport/Maintenance Engineer - Maintaining stable kernels * System Administrator - Configuring and troubleshooting * Maintainer - Leading subsystems and reviewing patches * Hardware Vendor - Writing drivers for new hardware * Distribution Maintainer - Packaging kernels for distros * AI Coding Assistant - LLMs and AI-powered development tools For Specific Users ================== New Kernel Developer -------------------- Welcome! Start your kernel development journey here: * Getting Started: Documentation/process/development-process.rst * Your First Patch: Documentation/process/submitting-patches.rst * Coding Style: Documentation/process/coding-style.rst * Build System: Documentation/kbuild/index.rst * Development Tools: Documentation/dev-tools/index.rst * Kernel Hacking Guide: Documentation/kernel-hacking/hacking.rst * Core APIs: Documentation/core-api/index.rst Academic Researcher ------------------- Explore the kernel's architecture and internals: * Researcher Guidelines: Documentation/process/researcher-guidelines.rst * Memory Management: Documentation/mm/index.rst * Scheduler: Documentation/scheduler/index.rst * Networking Stack: Documentation/networking/index.rst * Filesystems: Documentation/filesystems/index.rst * RCU (Read-Copy Update): Documentation/RCU/index.rst * Locking Primitives: Documentation/locking/index.rst * Power Management: Documentation/power/index.rst Security Expert --------------- Security documentation and hardening guides: * Security Documentation: Documentation/security/index.rst * LSM Development: Documentation/security/lsm-development.rst * Self Protection: Documentation/security/self-protection.rst * Reporting Vulnerabilities: Documentation/process/security-bugs.rst * CVE Procedures: Documentation/process/cve.rst * Embargoed Hardware Issues: Documentation/process/embargoed-hardware-issues.rst * Security Features: Documentation/userspace-api/seccomp_filter.rst Backport/Maintenance Engineer ----------------------------- Maintain and stabilize kernel versions: * Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst * Backporting Guide: Documentation/process/backporting.rst * Applying Patches: Documentation/process/applying-patches.rst * Subsystem Profile: Documentation/maintainer/maintainer-entry-profile.rst * Git for Maintainers: Documentation/maintainer/configure-git.rst System Administrator -------------------- Configure, tune, and troubleshoot Linux systems: * Admin Guide: Documentation/admin-guide/index.rst * Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst * Sysctl Tuning: Documentation/admin-guide/sysctl/index.rst * Tracing/Debugging: Documentation/trace/index.rst * Performance Security: Documentation/admin-guide/perf-security.rst * Hardware Monitoring: Documentation/hwmon/index.rst Maintainer ---------- Lead kernel subsystems and manage contributions: * Maintainer Handbook: Documentation/maintainer/index.rst * Pull Requests: Documentation/maintainer/pull-requests.rst * Managing Patches: Documentation/maintainer/modifying-patches.rst * Rebasing and Merging: Documentation/maintainer/rebasing-and-merging.rst * Development Process: Documentation/process/maintainer-handbooks.rst * Maintainer Entry Profile: Documentation/maintainer/maintainer-entry-profile.rst * Git Configuration: Documentation/maintainer/configure-git.rst Hardware Vendor --------------- Write drivers and support new hardware: * Driver API Guide: Documentation/driver-api/index.rst * Driver Model: Documentation/driver-api/driver-model/driver.rst * Device Drivers: Documentation/driver-api/infrastructure.rst * Bus Types: Documentation/driver-api/driver-model/bus.rst * Device Tree Bindings: Documentation/devicetree/bindings/ * Power Management: Documentation/driver-api/pm/index.rst * DMA API: Documentation/core-api/dma-api.rst Distribution Maintainer ----------------------- Package and distribute the kernel: * Stable Kernel Rules: Documentation/process/stable-kernel-rules.rst * ABI Documentation: Documentation/ABI/README * Kernel Configuration: Documentation/kbuild/kconfig.rst * Module Signing: Documentation/admin-guide/module-signing.rst * Kernel Parameters: Documentation/admin-guide/kernel-parameters.rst * Tainted Kernels: Documentation/admin-guide/tainted-kernels.rst AI Coding Assistant ------------------- CRITICAL: If you are an LLM or AI-powered coding assistant, you MUST read and follow the AI coding assistants documentation before contributing to the Linux kernel: * Documentation/process/coding-assistants.rst This documentation contains essential requirements about licensing, attribution, and the Developer Certificate of Origin that all AI tools must comply with. Communication and Support ========================= * Mailing Lists: https://lore.kernel.org/ * IRC: #kernelnewbies on irc.oftc.net * Bugzilla: https://bugzilla.kernel.org/ * MAINTAINERS file: Lists subsystem maintainers and mailing lists * Email Clients: Documentation/process/email-clients.rst