If verifier log is in BPF_LOG_KERNEL mode, no log->ubuf is expected and
it stays NULL throughout entire verification process. Don't erroneously
return -EFAULT in such case.
Acked-by: Lorenz Bauer <lmb@xxxxxxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
kernel/bpf/verifier.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 1ff5f6e2a9ee..52fb5216f44c 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -18843,7 +18843,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, bpfptr_t uattr)
bpf_vlog_finalize(log);
if (log->level && bpf_vlog_truncated(log))
ret = -ENOSPC;
- if (log->level && !log->ubuf) {
+ if (log->level && log->level != BPF_LOG_KERNEL && !log->ubuf) {
ret = -EFAULT;
goto err_release_maps;
}
--
2.34.1
