bpf: Validate node_id in arena_alloc_pages()

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arena_alloc_pages() accepts a plain int node_id and forwards it through
the entire allocation chain without any bounds checking.

Validate node_id before passing it down the allocation chain in
arena_alloc_pages().

Fixes: 317460317a ("bpf: Introduce bpf_arena.")
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260417152135.1383754-1-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Puranjay Mohan 2026-04-17 08:21:33 -07:00 • committed by Alexei Starovoitov

parent 380044c40b

commit 2845989f2e

1 changed files with 4 additions and 0 deletions

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kernel/bpf/arena.c

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