Changes in btf_sanitize.c

0fc8f6200d2313278fbf4539bbab74677c685531 - Merge drm/drm-fixes into drm-misc-fixes

Mon, 27 Apr 2026 10:26:49 +0200

Merge drm/drm-fixes into drm-misc-fixesGetting fixes and updates from v7.1-rc1.Signed-off-by: Thomas Zimmermann List of files: /linux/tools/testing/selftests/bpf/prog_tests/btf_sanitize.c

f5ad4101009e7f5f5984ffea6923d4fcd470932a - Merge tag 'bpf-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Wed, 15 Apr 2026 03:04:04 +0200

Merge tag 'bpf-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextPull bpf updates from Alexei Starovoitov: - Welcome new BPF maintainers: Kumar Kartikeya Dwivedi, Eduard Zingerman while Martin KaFai Lau reduced his load to Reviwer. - Lots of fixes everywhere from many first time contributors. Thank you All. - Diff stat is dominated by mechanical split of verifier.c into multiple components: - backtrack.c: backtracking logic and jump history - states.c: state equivalence - cfg.c: control flow graph, postorder, strongly connected components - liveness.c: register and stack liveness - fixups.c: post-verification passes: instruction patching, dead code removal, bpf_loop inlining, finalize fastcall 8k line were moved. verifier.c still stands at 20k lines. Further refactoring is planned for the next release. - Replace dynamic stack liveness with static stack liveness based on data flow analysis. This improved the verification time by 2x for some programs and equally reduced memory consumption. New logic is in liveness.c and supported by constant folding in const_fold.c (Eduard Zingerman, Alexei Starovoitov) - Introduce BTF layout to ease addition of new BTF kinds (Alan Maguire) - Use kmalloc_nolock() universally in BPF local storage (Amery Hung) - Fix several bugs in linked registers delta tracking (Daniel Borkmann) - Improve verifier support of arena pointers (Emil Tsalapatis) - Improve verifier tracking of register bounds in min/max and tnum domains (Harishankar Vishwanathan, Paul Chaignon, Hao Sun) - Further extend support for implicit arguments in the verifier (Ihor Solodrai) - Add support for nop,nop5 instruction combo for USDT probes in libbpf (Jiri Olsa) - Support merging multiple module BTFs (Josef Bacik) - Extend applicability of bpf_kptr_xchg (Kaitao Cheng) - Retire rcu_trace_implies_rcu_gp() (Kumar Kartikeya Dwivedi) - Support variable offset context access for 'syscall' programs (Kumar Kartikeya Dwivedi) - Migrate bpf_task_work and dynptr to kmalloc_nolock() (Mykyta Yatsenko) - Fix UAF in in open-coded task_vma iterator (Puranjay Mohan)* tag 'bpf-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (241 commits) selftests/bpf: cover short IPv4/IPv6 inputs with adjust_room bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb selftests/bpf: Use memfd_create instead of shm_open in cgroup_iter_memcg selftests/bpf: Add test for cgroup storage OOB read bpf: Fix OOB in pcpu_init_value selftests/bpf: Fix reg_bounds to match new tnum-based refinement selftests/bpf: Add tests for non-arena/arena operations bpf: Allow instructions with arena source and non-arena dest registers bpftool: add missing fsession to the usage and docs of bpftool docs/bpf: add missing fsession attach type to docs bpf: add missing fsession to the verifier log bpf: Move BTF checking logic into check_btf.c bpf: Move backtracking logic to backtrack.c bpf: Move state equivalence logic to states.c bpf: Move check_cfg() into cfg.c bpf: Move compute_insn_live_regs() into liveness.c bpf: Move fixup/post-processing logic from verifier.c into fixups.c bpf: Simplify do_check_insn() bpf: Move checks for reserved fields out of the main pass bpf: Delete unused variable ... List of files: /linux/tools/testing/selftests/bpf/prog_tests/btf_sanitize.c

749b925802c2351ae7204e6960ca086e4c4e4fa7 - Merge branch 'selftests-bpf-test-btf-sanitization'

Fri, 10 Apr 2026 21:34:36 +0200

Merge branch 'selftests-bpf-test-btf-sanitization'Alan Maguire says:====================selftests/bpf: Test BTF sanitizationAllow simulation of missing BPF features through provision ofa synthetic feature cache set, and use this to simulate casewhere FEAT_BTF_LAYOUT is missing. Ensure sanitization leaves uswith expected BTF (layout info removed, layout header fieldszeroed, strings data adjusted).Specifying a feature cache with selected missing features willallow testing of other missing feature codepaths, but for nowadd BTF layout sanitization test only.Changes since v2 [1]:- change zfree() to free() since we immediately assign the feat_cache (Jiri, patch 1)- "goto out" to avoid skeleton leak (Chengkaitao, patch 2)- just use kfree_skb__open() since we do not need to load skeletonChanges since v1 [2]:- renamed to bpf_object_set_feat_cache() (Andrii, patch 1)- remove __packed, relocate skeleton open/load, fix formatting issues (Andrii, patch 2)[1] https://lore.kernel.org/bpf/20260408105324.663280-1-alan.maguire@oracle.com/[2] https://lore.kernel.org/bpf/20260401164302.3844142-1-alan.maguire@oracle.com/====================Link: https://patch.msgid.link/20260408165735.843763-1-alan.maguire@oracle.comSigned-off-by: Alexei Starovoitov List of files: /linux/tools/testing/selftests/bpf/prog_tests/btf_sanitize.c

0e4dc6fbddb01b2ce0d0b4d67ad5f70e976bedcc - selftests/bpf: Add BTF sanitize test covering BTF layout

Wed, 08 Apr 2026 18:57:35 +0200

selftests/bpf: Add BTF sanitize test covering BTF layoutAdd test that fakes up a feature cache of supported BPFfeatures to simulate an older kernel that does not supportBTF layout information. Ensure that BTF is sanitized correctlyto remove layout info between types and strings, and that alloffsets and lengths are adjusted appropriately.Signed-off-by: Alan Maguire Link: https://lore.kernel.org/r/20260408165735.843763-3-alan.maguire@oracle.comSigned-off-by: Alexei Starovoitov List of files: /linux/tools/testing/selftests/bpf/prog_tests/btf_sanitize.c