From 4be5eb9f24080fac603bbf504d84422f508d45e6 Mon Sep 17 00:00:00 2001
From: Ibrahim Burak Yorulmaz <iburaky@gmail.com>
Date: Mon, 6 Apr 2026 04:08:15 +0200
Subject: [PATCH] dd: exit when bs/ibs/obs/cbs isn't positive

---
 src/uu/dd/src/parseargs.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/uu/dd/src/parseargs.rs b/src/uu/dd/src/parseargs.rs
index 0df5c2b38..a2bc11036 100644
--- a/src/uu/dd/src/parseargs.rs
+++ b/src/uu/dd/src/parseargs.rs
@@ -320,8 +320,12 @@ impl Parser {
     }
 
     fn parse_bytes(arg: &str, val: &str) -> Result<usize, ParseError> {
-        parse_bytes_with_opt_multiplier(val)?
-            .try_into()
+        let num = parse_bytes_with_opt_multiplier(val)?;
+
+        if num == 0 {
+            return Err(ParseError::InvalidNumber(val.to_string()));
+        }
+        num.try_into()
             .map_err(|_| ParseError::BsOutOfRange(arg.to_string()))
     }