From e5ff5518851a179601b06f2d61587981a3a7b407 Mon Sep 17 00:00:00 2001
From: Jan Michael Auer <mail@jauer.org>
Date: Tue, 3 Dec 2019 08:12:03 +0100
Subject: [PATCH] Support ELF with empty PT_DYNAMIC reference (#193)

---
 src/elf/dynamic.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/elf/dynamic.rs b/src/elf/dynamic.rs
index 94e8e5dc9..466bedda5 100644
--- a/src/elf/dynamic.rs
+++ b/src/elf/dynamic.rs
@@ -372,10 +372,14 @@ if_alloc! {
                     let offset = phdr.p_offset as usize;
                     let filesz = phdr.p_filesz as usize;
                     // Ensure offset and filesz are valid.
-                    let bytes = bytes
-                        .pread_with::<&[u8]>(offset, filesz)
-                        .map_err(|_| crate::error::Error::Malformed(format!("Invalid PT_DYNAMIC size (offset {:#x}, filesz {:#x})",
-                                                               offset, filesz)))?;
+                    let bytes = if filesz > 0 {
+                        bytes
+                            .pread_with::<&[u8]>(offset, filesz)
+                            .map_err(|_| crate::error::Error::Malformed(format!("Invalid PT_DYNAMIC size (offset {:#x}, filesz {:#x})",
+                                                               offset, filesz)))?
+                    } else {
+                        &[]
+                    };
                     let size = Dyn::size_with(&ctx);
                     let count = filesz / size;
                     let mut dyns = Vec::with_capacity(count);