From 392e1cc1ef24ad521c2b4b547ac6cb6ade9b949b Mon Sep 17 00:00:00 2001
From: bol-van <none@none.none>
Date: Fri, 6 Feb 2026 14:58:24 +0300
Subject: [PATCH] nfqws2: fix sz=0 case in fill_random_bytes

---
 nfq2/helpers.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/nfq2/helpers.c b/nfq2/helpers.c
index 50a4e40..a119030 100644
--- a/nfq2/helpers.c
+++ b/nfq2/helpers.c
@@ -456,11 +456,14 @@ bool file_open_test(const char *filename, int flags)
 void fill_random_bytes(uint8_t *p,size_t sz)
 {
 	size_t k;
-	// alignment
-	if ((size_t)p & 1) { *p=(uint8_t)random(); sz--; p++; }
-	// random has only 31 bits of entropy. not 32 bits
-	for (k=0 ; (k+1)<sz ; k+=2) *(uint16_t*)(p+k) = (uint16_t)random();
-	if (sz & 1) p[sz-1]=(uint8_t)random();
+	if (sz)
+	{
+		// alignment
+		if ((size_t)p & 1) { *p=(uint8_t)random(); sz--; p++; }
+		// random has only 31 bits of entropy. not 32 bits
+		for (k=0 ; (k+1)<sz ; k+=2) *(uint16_t*)(p+k) = (uint16_t)random();
+		if (sz & 1) p[sz-1]=(uint8_t)random();
+	}
 }
 void fill_random_az(uint8_t *p,size_t sz)
 {