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bpf: increase verifier log limit 

The existing 16Mbyte verifier log limit is not enough for log_level=2
even for small programs. Increase it to 1Gbyte.
Note it's not a kernel memory limit.
It's an amount of memory user space provides to store
the verifier log. The kernel populates it 1k at a time.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Alexei Starovoitov 2019-04-01 21:27:46 -07:00 committed by Daniel Borkmann
parent c04c0d2b96
commit 7a9f5c65ab
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/verifier.c
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@ -7974,7 +7974,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr,
ret = -EINVAL;
/* 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 || log->level & ~BPF_LOG_MASK)
goto err_unlock;
}