bpf: Check link_create.flags parameter for multi_kprobe

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[ Upstream commit 243911982a ]

The link_create.flags are currently not used for multi-kprobes, so return
-EINVAL if it is set, same as for other attach APIs.

We allow target_fd, on the other hand, to have an arbitrary value for
multi-kprobe, as there are existing users (libbpf) relying on this.

Fixes: 0dcac27254 ("bpf: Add multi kprobe link")
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250407035752.1108927-1-chen.dylane@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Tao Chen 2025-04-07 11:57:51 +08:00 • committed by Greg Kroah-Hartman

parent fa5977d89d

commit 671dd1fb87

1 changed files with 3 additions and 0 deletions

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kernel/trace/bpf_trace.c

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