bpf: Track verifier reference diagnostic events

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Add reference acquire and release events to diagnostic history so Resource
Lifetime Safety reports can show the lifetime of a specific reference id along
the path.

Record acquisitions after the verifier assigns the reference id. Record
releases only after release_reference_nomark() succeeds, including the
kptr_xchg RCU conversion path and owning-to-non-owning conversion path that
consume an owning reference.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260815064612.378577-7-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

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Kumar Kartikeya Dwivedi 2026-08-15 08:46:01 +02:00 • committed by Eduard Zingerman

parent af4ea6e20f

commit 9ecd70304e

3 changed files with 55 additions and 7 deletions

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28

kernel/bpf/diagnostics.c

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2

kernel/bpf/diagnostics.h

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32

kernel/bpf/verifier.c

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