Commit 7a9f5c65 authored Apr 01, 2019 by Alexei Starovoitov Committed by Daniel Borkmann Apr 04, 2019

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>

parent c04c0d2b

kernel/bpf/verifier.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

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