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bpf: Adjust BTF log size limit.

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[ Upstream commit c5a2d43e99 ]

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.

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 Greg Kroah-Hartman
parent b77ef5b4ea
commit 218d952160
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/btf.c
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@@ -4135,7 +4135,7 @@ 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;