diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 5ddb9a626a51..f00ef751c1c5 100644
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -115,9 +115,11 @@ struct bpf_insn_aux_data {
 
 #define MAX_USED_MAPS 64 /* max number of maps accessed by one eBPF program */
 
+#define BPF_VERIFIER_TMP_LOG_SIZE	1024
+
 struct bpf_verifer_log {
 	u32 level;
-	char *kbuf;
+	char kbuf[BPF_VERIFIER_TMP_LOG_SIZE];
 	char __user *ubuf;
 	u32 len_used;
 	u32 len_total;
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 274c6582ec39..2cdbcc4f8f6b 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -165,15 +165,26 @@ static __printf(2, 3) void verbose(struct bpf_verifier_env *env,
 				   const char *fmt, ...)
 {
 	struct bpf_verifer_log *log = &env->log;
+	unsigned int n;
 	va_list args;
 
-	if (!log->level || bpf_verifier_log_full(log))
+	if (!log->level || !log->ubuf || bpf_verifier_log_full(log))
 		return;
 
 	va_start(args, fmt);
-	log->len_used += vscnprintf(log->kbuf + log->len_used,
-				    log->len_total - log->len_used, fmt, args);
+	n = vscnprintf(log->kbuf, BPF_VERIFIER_TMP_LOG_SIZE, fmt, args);
 	va_end(args);
+
+	WARN_ONCE(n >= BPF_VERIFIER_TMP_LOG_SIZE - 1,
+		  "verifier log line truncated - local buffer too short\n");
+
+	n = min(log->len_total - log->len_used - 1, n);
+	log->kbuf[n] = '\0';
+
+	if (!copy_to_user(log->ubuf + log->len_used, log->kbuf, n + 1))
+		log->len_used += n;
+	else
+		log->ubuf = NULL;
 }
 
 static bool type_is_pkt_pointer(enum bpf_reg_type type)
@@ -4263,11 +4274,6 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr)
 		if (log->len_total < 128 || log->len_total > UINT_MAX >> 8 ||
 		    !log->level || !log->ubuf)
 			goto err_unlock;
-
-		ret = -ENOMEM;
-		log->kbuf = vmalloc(log->len_total);
-		if (!log->kbuf)
-			goto err_unlock;
 	}
 
 	env->strict_alignment = !!(attr->prog_flags & BPF_F_STRICT_ALIGNMENT);
@@ -4304,18 +4310,11 @@ skip_full_check:
 	if (ret == 0)
 		ret = fixup_bpf_calls(env);
 
-	if (log->level && bpf_verifier_log_full(log)) {
-		BUG_ON(log->len_used >= log->len_total);
-		/* verifier log exceeded user supplied buffer */
+	if (log->level && bpf_verifier_log_full(log))
 		ret = -ENOSPC;
-		/* fall through to return what was recorded */
-	}
-
-	/* copy verifier log back to user space including trailing zero */
-	if (log->level && copy_to_user(log->ubuf, log->kbuf,
-				       log->len_used + 1) != 0) {
+	if (log->level && !log->ubuf) {
 		ret = -EFAULT;
-		goto free_log_buf;
+		goto err_release_maps;
 	}
 
 	if (ret == 0 && env->used_map_cnt) {
@@ -4326,7 +4325,7 @@ skip_full_check:
 
 		if (!env->prog->aux->used_maps) {
 			ret = -ENOMEM;
-			goto free_log_buf;
+			goto err_release_maps;
 		}
 
 		memcpy(env->prog->aux->used_maps, env->used_maps,
@@ -4339,9 +4338,7 @@ skip_full_check:
 		convert_pseudo_ld_imm64(env);
 	}
 
-free_log_buf:
-	if (log->level)
-		vfree(log->kbuf);
+err_release_maps:
 	if (!env->prog->aux->used_maps)
 		/* if we didn't copy map pointers into bpf_prog_info, release
 		 * them now. Otherwise free_bpf_prog_info() will release them.