overlay sys-fs/overlaybd: Add a patch for issue inside tcmu

sdk_container/src/third_party/coreos-overlay/sys-fs/overlaybd/files/overlaybd-cross.patch

@@ -127,3 +127,28 @@ Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
 -- 
 2.49.0
 
+
+From 32a592ef523a14600ce658a695d827724aeb66c9 Mon Sep 17 00:00:00 2001
+From: Krzesimir Nowak <knowak@microsoft.com>
+Date: Fri, 8 Aug 2025 16:47:58 +0200
+Subject: [PATCH] Patch libtcmu after fetching to fix memory issues
+
+---
+ CMake/Findtcmu.cmake | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/CMake/Findtcmu.cmake b/CMake/Findtcmu.cmake
+index 6e8f0ef..5865a9b 100644
+--- a/CMake/Findtcmu.cmake
++++ b/CMake/Findtcmu.cmake
+@@ -5,6 +5,7 @@ FetchContent_Declare(
+   tcmu
+   GIT_REPOSITORY https://github.com/data-accelerator/photon-libtcmu.git
+   GIT_TAG main
++  PATCH_COMMAND patch -p1 -i @FILESDIR@/tcmu-fix.patch
+ )
+ 
+ if(BUILD_TESTING)
+-- 
+2.49.1
+

sdk_container/src/third_party/coreos-overlay/sys-fs/overlaybd/files/tcmu-fix.patch

@@ -0,0 +1,46 @@
+From 0ee2c928de51ef56376c4ab6528ca1e23c13c4a7 Mon Sep 17 00:00:00 2001
+From: Krzesimir Nowak <knowak@microsoft.com>
+Date: Fri, 8 Aug 2025 16:29:52 +0200
+Subject: [PATCH] fix
+
+---
+ scsi.cpp | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/scsi.cpp b/scsi.cpp
+index d8c27a9..4c7f480 100644
+--- a/scsi.cpp
++++ b/scsi.cpp
+@@ -183,7 +183,7 @@ int tcmu_emulate_evpd_inquiry(
+ 	{
+ 		char data[512];
+ 		char *ptr, *p, *wwn;
+-		size_t len, used = 0;
++		size_t len, used = 4;
+ 		uint16_t *tot_len = (uint16_t*) &data[2];
+ 		uint32_t padding;
+ 		bool next;
+@@ -207,7 +207,7 @@ int tcmu_emulate_evpd_inquiry(
+ 
+ 		ptr[3] = 8 + len + 1;
+ 		used += (uint8_t)ptr[3] + 4;
+-		ptr += used;
++		ptr += (uint8_t)ptr[3] + 4;
+ 
+ 		/* 2/5: NAA binary */
+ 		ptr[0] = 1; /* code set: binary */
+@@ -340,9 +340,9 @@ int tcmu_emulate_evpd_inquiry(
+ finish_page83:
+ 		/* Done with descriptor list */
+ 
+-		*tot_len = htobe16(used);
++		*tot_len = htobe16(used - 4);
+ 
+-		tcmu_memcpy_into_iovec(iovec, iov_cnt, data, used + 4);
++		tcmu_memcpy_into_iovec(iovec, iov_cnt, data, used);
+ 
+ 		free(wwn);
+ 		wwn = NULL;
+-- 
+2.49.1
+

sdk_container/src/third_party/coreos-overlay/sys-fs/overlaybd/overlaybd-9999.ebuild

@@ -49,7 +49,7 @@ PATCHES=(
 
 src_prepare() {
 	cmake_src_prepare
-	sed -i "s:@FILESDIR@:${FILESDIR}:g" CMake/Findphoton.cmake || die
+	sed -i "s:@FILESDIR@:${FILESDIR}:g" CMake/Findphoton.cmake CMake/Findtcmu.cmake || die
 }
 
 src_configure() {