From 7546295abedf0d955c5bc54be68574ea890cff15 Mon Sep 17 00:00:00 2001
From: Daniel Bertalan <dani@danielbertalan.dev>
Date: Sun, 5 Dec 2021 07:52:53 +0100
Subject: [PATCH] LibDebug: Fix truncation in ExtendedOpcodes::SetDiscriminator

The parameter of this operator is an unsigned LEB128 integer, so it can
be more than 1 byte in length. If we only read 1 byte, we might mess up
the offsets for the instructions following it.
---
 Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp b/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
index 6758c2e2e9..df1c50b394 100644
--- a/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
+++ b/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
@@ -170,7 +170,8 @@ void LineProgram::handle_extended_opcode()
     }
     case ExtendedOpcodes::SetDiscriminator: {
         dbgln_if(DWARF_DEBUG, "SetDiscriminator");
-        m_stream.discard_or_error(1);
+        size_t discriminator;
+        m_stream.read_LEB128_unsigned(discriminator);
         break;
     }
     default: