bpf: allow sleepable uprobe programs to attach

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uprobe and kprobe programs have the same program type, KPROBE, which is
currently not allowed to load sleepable programs.

To avoid adding a new UPROBE type, instead allow sleepable KPROBE
programs to load and defer the is-it-actually-a-uprobe-program check
to attachment time, where there's already validation of the
corresponding perf_event.

A corollary of this patch is that you can now load a sleepable kprobe
program but cannot attach it.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Delyan Kratunov <delyank@fb.com>
Link: https://lore.kernel.org/r/fcd44a7cd204f372f6bb03ef794e829adeaef299.1655248076.git.delyank@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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This commit is contained in:

Delyan Kratunov 2022-06-14 23:10:43 +00:00 • committed by Alexei Starovoitov

parent 8c7dcb84e3

commit 64ad7556c7

2 changed files with 12 additions and 8 deletions

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4

kernel/bpf/verifier.c

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16

kernel/events/core.c

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