fix idb_import invalid offset in EoF hit

Author: rbran

plugins/idb_import/src/lib.rs

@@ -81,7 +81,7 @@ struct BinaryViewReader<'a> {
 impl std::io::Read for BinaryViewReader<'_> {
     fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
         if !self.bv.offset_valid(self.offset) {
-            return Err(std::io::Error::new(std::io::ErrorKind::UnexpectedEof, ""));
+            return Ok(0);
         }
         let len = BinaryView::read(&self.bv, buf, self.offset);
         self.offset += u64::try_from(len).unwrap();
@@ -96,10 +96,17 @@ impl std::io::Seek for BinaryViewReader<'_> {
             std::io::SeekFrom::End(end) => self.bv.len().checked_add_signed(end),
             std::io::SeekFrom::Current(next) => self.offset.checked_add_signed(next),
         };
-        let new_offset =
-            new_offset.ok_or_else(|| std::io::Error::new(std::io::ErrorKind::UnexpectedEof, ""))?;
+        let new_offset = new_offset.ok_or_else(|| {
+            std::io::Error::new(
+                std::io::ErrorKind::UnexpectedEof,
+                "BinaryView offset overflow",
+            )
+        })?;
         if !self.bv.offset_valid(new_offset) {
-            return Err(std::io::Error::new(std::io::ErrorKind::UnexpectedEof, ""));
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::UnexpectedEof,
+                "BinaryView Invalid offset",
+            ));
         }
         self.offset = new_offset;
         Ok(new_offset)