Merge branch 'bpf-control-flow-graph-and-precision-backtrack-fixes'

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Andrii Nakryiko says:

====================
BPF control flow graph and precision backtrack fixes

A small fix to BPF verifier's CFG logic around handling and reporting ldimm64
instructions. Patch #1 was previously submitted separately ([0]), and so this
patch set supersedes that patch.

Second patch is fixing obscure corner case in mark_chain_precise() logic. See
patch for details. Patch #3 adds a dedicated test, however fragile it might.

  [0] https://patchwork.kernel.org/project/netdevbpf/patch/20231101205626.119243-1-andrii@kernel.org/
====================

Link: https://lore.kernel.org/r/20231110002638.4168352-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Alexei Starovoitov 2023-11-09 20:11:20 -08:00

parent fe69a1b1b6 62ccdb11d3

commit 8c74b27f4b

4 changed files with 89 additions and 15 deletions

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8

include/linux/bpf.h

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48

kernel/bpf/verifier.c

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40

tools/testing/selftests/bpf/progs/verifier_precision.c

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8

tools/testing/selftests/bpf/verifier/ld_imm64.c

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