bpf: Report Policy helper and kfunc errors

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Augment selected helper and kfunc allowability failures with Policy reports.
These reports explain which requested operation is forbidden and why, without
adding path history for non-path-dependent policy checks.

Cover unprivileged bpf2bpf and kfunc use, helper program-type restrictions,
GPL-only helpers, helper-specific allow callbacks, kfunc allowability, and
destructive kfunc capability checks.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260815064612.378577-15-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

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Kumar Kartikeya Dwivedi 2026-08-15 08:46:09 +02:00 • committed by Eduard Zingerman

parent a8f4278353

commit ac545b00ca

3 changed files with 48 additions and 1 deletions

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14

kernel/bpf/diagnostics.c

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2

kernel/bpf/diagnostics.h

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33

kernel/bpf/verifier.c

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