From: Philippe Antoine <pantoine@oisf.net>
Date: Tue, 7 May 2024 08:18:14 +0000 (+0200)
Subject: rust: return empty slice without using from_raw_parts
X-Git-Tag: suricata-8.0.0-beta1~1322
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5dc8dea8695786daec491a6655f99c0791e47f5c;p=thirdparty%2Fsuricata.git

rust: return empty slice without using from_raw_parts

As this triggers rustc 1.78
unsafe precondition(s) violated: slice::from_raw_parts requires
the pointer to be aligned and non-null,
and the total size of the slice not to exceed `isize::MAX`

Ticket: 7013
---

diff --git a/rust/src/applayer.rs b/rust/src/applayer.rs
index 522143fb6d..dbf4b2cd2d 100644
--- a/rust/src/applayer.rs
+++ b/rust/src/applayer.rs
@@ -58,6 +58,9 @@ impl StreamSlice {
         self.input_len
     }
     pub fn as_slice(&self) -> &[u8] {
+        if self.input.is_null() && self.input_len == 0 {
+            return &[];
+        }
         unsafe { std::slice::from_raw_parts(self.input, self.input_len as usize) }
     }
     pub fn is_empty(&self) -> bool {