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authorAlexei Starovoitov <ast@kernel.org>2019-04-01 21:27:46 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2019-04-04 01:27:38 +0200
commit7a9f5c65abcc9644b11738ca0815510cb5510eaf (patch)
treea6f9460e4dbd029f130ac317ae83526536614b5e /kernel/bpf
parentc04c0d2b968ac45d6ef020316808ef6c82325a82 (diff)
downloadlinux-7a9f5c65abcc9644b11738ca0815510cb5510eaf.tar.bz2
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>
Diffstat (limited to 'kernel/bpf')
-rw-r--r--kernel/bpf/verifier.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index b631e89e7a51..bb27b675923c 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -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;
}