lz4: patch CVE-2025-62813

Pick commit mentioned in NVD report.

(From OE-Core rev: 612d09f6b9e262640ed3ee0ee81ac4b6d7c29f4d)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 72 insertions, 1 deletions

diff --git a/meta/recipes-support/lz4/files/CVE-2025-62813.patch b/meta/recipes-support/lz4/files/CVE-2025-62813.patch
new file mode 100644
index 0000000000..cb4d497d7c
--- /dev/null
+++ b/meta/recipes-support/lz4/files/CVE-2025-62813.patch
@@ -0,0 +1,69 @@
+From f64efec011c058bd70348576438abac222fe6c82 Mon Sep 17 00:00:00 2001
+From: louislafosse <louis.lafosse@epitech.eu>
+Date: Mon, 31 Mar 2025 20:48:52 +0200
+Subject: [PATCH] fix(null) : improve error handlings when passing a null
+ pointer to some functions from lz4frame
+
+CVE: CVE-2025-62813
+Upstream-Status: Backport [https://github.com/lz4/lz4/commit/f64efec011c058bd70348576438abac222fe6c82]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ lib/lz4frame.c    | 15 +++++++++++++--
+ tests/frametest.c |  9 ++++++---
+ 2 files changed, 19 insertions(+), 5 deletions(-)
+
+diff --git a/lib/lz4frame.c b/lib/lz4frame.c
+index 85daca7b..c9e4a3cf 100644
+--- a/lib/lz4frame.c
++++ b/lib/lz4frame.c
+@@ -530,9 +530,16 @@ LZ4F_CDict*
+ LZ4F_createCDict_advanced(LZ4F_CustomMem cmem, const void* dictBuffer, size_t dictSize)
+ {
+     const char* dictStart = (const char*)dictBuffer;
+-    LZ4F_CDict* const cdict = (LZ4F_CDict*)LZ4F_malloc(sizeof(*cdict), cmem);
++    LZ4F_CDict* cdict = NULL;
++
+     DEBUGLOG(4, "LZ4F_createCDict_advanced");
+-    if (!cdict) return NULL;
++
++    if (!dictStart)
++        return NULL;
++    cdict = (LZ4F_CDict*)LZ4F_malloc(sizeof(*cdict), cmem);
++    if (!cdict)
++        return NULL;
++
+     cdict->cmem = cmem;
+     if (dictSize > 64 KB) {
+         dictStart += dictSize - 64 KB;
+@@ -1429,6 +1436,10 @@ LZ4F_errorCode_t LZ4F_getFrameInfo(LZ4F_dctx* dctx,
+                                    LZ4F_frameInfo_t* frameInfoPtr,
+                              const void* srcBuffer, size_t* srcSizePtr)
+ {
++    assert(dctx != NULL);
++    RETURN_ERROR_IF(frameInfoPtr == NULL, parameter_null);
++    RETURN_ERROR_IF(srcSizePtr == NULL, parameter_null);
++
+     LZ4F_STATIC_ASSERT(dstage_getFrameHeader < dstage_storeFrameHeader);
+     if (dctx->dStage > dstage_storeFrameHeader) {
+         /* frameInfo already decoded */
+diff --git a/tests/frametest.c b/tests/frametest.c
+index de0fe643..90247547 100644
+--- a/tests/frametest.c
++++ b/tests/frametest.c
+@@ -589,10 +589,13 @@ int basicTests(U32 seed, double compressibility)
+         size_t const srcSize = 65 KB; /* must be > 64 KB to avoid short-size optimizations */
+         size_t const dstCapacity = LZ4F_compressFrameBound(srcSize, NULL);
+         size_t cSizeNoDict, cSizeWithDict;
+-        LZ4F_CDict* const cdict = LZ4F_createCDict(CNBuffer, dictSize);
+-        if (cdict == NULL) goto _output_error;
+-        CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
++        LZ4F_CDict* cdict = NULL;
+ 
++        CHECK( LZ4F_createCompressionContext(&cctx, LZ4F_VERSION) );
++        cdict = LZ4F_createCDict(CNBuffer, dictSize);
++        if (cdict == NULL)
++            goto _output_error;
++        
+         DISPLAYLEVEL(3, "Testing LZ4F_createCDict_advanced : ");
+         {   LZ4F_CDict* const cda = LZ4F_createCDict_advanced(lz4f_cmem_test, CNBuffer, dictSize);
+             if (cda == NULL) goto _output_error;
diff --git a/meta/recipes-support/lz4/lz4_1.9.4.bb b/meta/recipes-support/lz4/lz4_1.9.4.bb
index a2a178bab5..16bb4d0823 100644
--- a/meta/recipes-support/lz4/lz4_1.9.4.bb
+++ b/meta/recipes-support/lz4/lz4_1.9.4.bb
@@ -12,7 +12,9 @@ PE = "1"
 
 SRCREV = "5ff839680134437dbf4678f3d0c7b371d84f4964"
 
-SRC_URI = "git://github.com/lz4/lz4.git;branch=release;protocol=https"
+SRC_URI = "git://github.com/lz4/lz4.git;branch=release;protocol=https \
+           file://CVE-2025-62813.patch \
+"
 UPSTREAM_CHECK_GITTAGREGEX = "v(?P<pver>.*)"
 
 S = "${WORKDIR}/git"