selftests/bpf: Fix also no-alu32 strobemeta selftest
authorAndrii Nakryiko <andrii@kernel.org>
Mon, 1 Nov 2021 23:01:18 +0000 (16:01 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 17 Nov 2021 10:04:52 +0000 (11:04 +0100)
commita3c6e358fbe42247c347c6b777167e5c4351248d
tree47cdb1ca71dcb0293189131ce51aec1e3c6784a6
parent49ed44184d0ceb0b04347ebdc050cab5ce905df7
selftests/bpf: Fix also no-alu32 strobemeta selftest

commit a20eac0af02810669e187cb623bc904908c423af upstream.

Previous fix aded bpf_clamp_umax() helper use to re-validate boundaries.
While that works correctly, it introduces more branches, which blows up
past 1 million instructions in no-alu32 variant of strobemeta selftests.

Switching len variable from u32 to u64 also fixes the issue and reduces
the number of validated instructions, so use that instead. Fix this
patch and bpf_clamp_umax() removed, both alu32 and no-alu32 selftests
pass.

Fixes: 0133c20480b1 ("selftests/bpf: Fix strobemeta selftest regression")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211101230118.1273019-1-andrii@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tools/testing/selftests/bpf/progs/strobemeta.h