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bpf, offload: Reorder offload callback 'prepare' in verifier 

[ Upstream commit ceb11679d9fcf3fdb358a310a38760fcbe9b63ed ]

Commit 4976b718c3 ("bpf: Introduce pseudo_btf_id") switched the
order of resolve_pseudo_ldimm(), in which some pseudo instructions
are rewritten. Thus those rewritten instructions cannot be passed
to driver via 'prepare' offload callback.

Reorder the 'prepare' offload callback to fix it.

Fixes: 4976b718c3 ("bpf: Introduce pseudo_btf_id")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20210520085834.15023-1-simon.horman@netronome.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
pull/363/head^2
Yinjun Zhang 2021-05-20 10:58:34 +02:00 committed by Greg Kroah-Hartman
parent 78d5f41161
commit 24cb8bb7f6
1 changed files with 6 additions and 6 deletions
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12
kernel/bpf/verifier.c
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@ -12364,12 +12364,6 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr,
if (is_priv)
env->test_state_freq = attr->prog_flags & BPF_F_TEST_STATE_FREQ;
if (bpf_prog_is_dev_bound(env->prog->aux)) {
ret = bpf_prog_offload_verifier_prep(env->prog);
if (ret)
goto skip_full_check;
}
env->explored_states = kvcalloc(state_htab_size(env),
sizeof(struct bpf_verifier_state_list *),
GFP_USER);
@ -12393,6 +12387,12 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr,
if (ret < 0)
goto skip_full_check;
if (bpf_prog_is_dev_bound(env->prog->aux)) {
ret = bpf_prog_offload_verifier_prep(env->prog);
if (ret)
goto skip_full_check;
}
ret = check_cfg(env);
if (ret < 0)
goto skip_full_check;