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UPSTREAM: bpf: Adjust BTF log size limit.

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[ Upstream commit c5a2d43e998a821701029f23e25b62f9188e93ff ]

Make BTF log size limit to be the same as the verifier log size limit.
Otherwise tools that progressively increase log size and use the same log
for BTF loading and program loading will be hitting hard to debug EINVAL.

Change-Id: I71d6b2d7cdc393b9d3ef7665a20dd075e721452c
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211201181040.23337-7-alexei.starovoitov@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexei Starovoitov 2021-12-01 10:10:29 -08:00 • committed by basamaryan
commit f510e4b7ff
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1 changed files with 1 additions and 1 deletions
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kernel/bpf/btf.c
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@ -4141,7 +4141,7 @@ static struct btf *btf_parse(void __user *btf_data, u32 btf_data_size,
log->len_total = log_size;
/* log attributes have to be sane */
if (log->len_total < 128 || log->len_total > UINT_MAX >> 8 ||
if (log->len_total < 128 || log->len_total > UINT_MAX >> 2 ||
!log->level || !log->ubuf) {
err = -EINVAL;
goto errout;