llvm: Fix CVE-2023-46049

[Bitcode] Add some missing GetTypeByID failure checks

Print an error instead of crashing.

(From OE-Core rev: 9cc4518226488693942ad325d6264e52006bd061)

Signed-off-by: Deepthi Hemraj <Deepthi.Hemraj@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 35 insertions, 0 deletions

diff --git a/meta/recipes-devtools/llvm/llvm/CVE-2023-46049.patch b/meta/recipes-devtools/llvm/llvm/CVE-2023-46049.patch
new file mode 100644
index 0000000000..c34e9ae69c
--- /dev/null
+++ b/meta/recipes-devtools/llvm/llvm/CVE-2023-46049.patch
@@ -0,0 +1,34 @@
+commit c2515a8f2be5dd23354c9891f41ad104000f88c4
+Author: Nikita Popov <npopov@redhat.com>
+Date:   Tue Sep 26 16:51:40 2023 +0200
+
+    [Bitcode] Add some missing GetTypeByID failure checks
+
+    Print an error instead of crashing.
+
+    Fixes https://github.com/llvm/llvm-project/issues/67388.
+
+Upstream-Status: Backport [https://github.com/llvm/llvm-project/commit/c2515a8f2be5dd23354c9891f41ad104000f88c4]
+CVE: CVE-2023-46049
+Signed-off-by: Deepthi Hemraj <Deepthi.Hemraj@windriver.com>
+
+--- a/llvm/lib/Bitcode/Reader/MetadataLoader.cpp        2022-01-20 13:31:59.000000000 -0800
++++ b/llvm/lib/Bitcode/Reader/MetadataLoader.cpp        2024-07-28 21:35:31.062992219 -0700
+@@ -1235,7 +1235,7 @@
+     }
+ 
+     Type *Ty = getTypeByID(Record[0]);
+-    if (Ty->isMetadataTy() || Ty->isVoidTy()) {
++    if (!Ty || Ty->isMetadataTy() || Ty->isVoidTy()) {
+       dropRecord();
+       break;
+     }
+@@ -1277,7 +1277,7 @@
+       return error("Invalid record");
+ 
+     Type *Ty = getTypeByID(Record[0]);
+-    if (Ty->isMetadataTy() || Ty->isVoidTy())
++    if (!Ty || Ty->isMetadataTy() || Ty->isVoidTy())
+       return error("Invalid record");
+ 
+     MetadataList.assignValue(
diff --git a/meta/recipes-devtools/llvm/llvm_git.bb b/meta/recipes-devtools/llvm/llvm_git.bb
index cedbfb138e..dbf1ff45d4 100644
--- a/meta/recipes-devtools/llvm/llvm_git.bb
+++ b/meta/recipes-devtools/llvm/llvm_git.bb
@@ -33,6 +33,7 @@ SRC_URI = "git://github.com/llvm/llvm-project.git;branch=${BRANCH};protocol=http
            file://0007-llvm-allow-env-override-of-exe-path.patch;striplevel=2 \
            file://0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch;striplevel=2 \
            file://0001-Support-Add-missing-cstdint-header-to-Signals.h.patch;striplevel=2 \
+           file://CVE-2023-46049.patch;striplevel=2 \
            "
 
 UPSTREAM_CHECK_GITTAGREGEX = "llvmorg-(?P<pver>\d+(\.\d+)+)"