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Most of these are LLM fixes for old issues flagged by sashiko/LLMs. Many of these trigger drive-by-findings in sashiko. In particular: - many load/store tearing and missing memory barriers, races etc. in ipset, esp. with GC and resizing. Keeping the proposed patches spinning for yet-another-iteration keeps legit fixes back, so I prefer to add these now and follow up with other reports later. - flowtable work queue still has possible races with teardown, but same rationale as with ipset: drive-by findings, not problems coming with the flowtable IPIP changeset in this PR. - ever since unreadable frag skb support was added in 6.12, we can no longer do: BUG_ON(skb_copy_bits( ...): it will fire with such skbs. Mina Almasry is looking at similar patterns elsewhere in the stack. 1) Guard skb->mac_header adjustment after IPv6 defragmentation in nf_conntrack_reasm. From Xiang Mei. 2) NUL-terminate ebtables table names before calling find_table_lock() to prevent stack-out-of-bounds reads. Also from Xiang Mei. 3) Zero the ebtables chainstack array, else error unwind may free bogus pointer when CPU mask is sparse. All three issues date from 2.6 days. 4) Ensure ebtables module names are c-strings, same bug pattern as 2). Bug added in 4.6. 5) Fix catchall element handling for inverted lookups in nft_lookup. Fold the catchall lookup into ext before computing the match status. Was like this ever since catchall elements got introduced in 5.13. From Tamaki Yanagawa. 6-9) ipset updates from Jozsef Kadlecsik: - mark rcu protected areas correctly - address gc and resize clash in the comment extension - add/del backlog cleanup in the error path - allocate right size for the generic hash structure 10-12): IPIP flowtable updates from Pablo Neira Ayuso: - Use the current direction's route when pushing IPIP headers Fix incorrect headroom and fragmentation offset calculations. - Avoid hardware offload for IPIP tunnels due to lack of driver support. - Support IPIP tunnels with direct xmit in netfilter flowtable. dst_cache and dst_cookie are moved outside the union to share route state across flows. This is a followup to work done in 6.19 cycle. 13) Don't BUG() on skb_copy_bits error. Handle unreadable fragments by either returning an error or restricting the copy operations to linear area, This became an issue when unreable frag support was merged in 6.12. 14-16): IPVS updates from Yizhou Zhao: - Pass parsed transport offset to IPVS state handlers. update callback signatures. - use correct transport header offset on state lookp in TCP. As-is it was possible for ipv6 extension header data to be treated as L4 header. - same for SCTP. This was also broken since 2.6 days. 17) Ensure inner IP headers in ICMP errors are in the skb headroom after stripping outer headers. Add more checks for the length of inner headers. This was broken since 3.7 days. From Julian Anastasov. netfilter pull request nf-26-07-08 * tag 'nf-26-07-08' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf: ipvs: ensure inner headers in ICMP errors are in headroom ipvs: use parsed transport offset in SCTP state lookup ipvs: use parsed transport offset in TCP state lookup ipvs: pass parsed transport offset to state handlers netfilter: handle unreadable frags netfilter: flowtable: support IPIP tunnel with direct xmit netfilter: flowtable: IPIP tunnel hardware offload is not yet support netfilter: flowtable: use dst in this direction when pushing IPIP header netfilter: ipset: allocate the proper memory for the generic hash structure netfilter: ipset: cleanup the add/del backlog when resize failed netfilter: ipset: exclude gc when resize is in progress netfilter: ipset: mark the rcu locked areas properly netfilter: nft_lookup: fix catchall element handling with inverted lookups netfilter: ebtables: module names must be null-terminated netfilter: ebtables: zero chainstack array netfilter: ebtables: terminate table name before find_table_lock() netfilter: nf_conntrack_reasm: guard mac_header adjustment after IPv6 defrag ==================== Link: https://patch.msgid.link/20260708140309.19633-1-fw@strlen.de Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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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. 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