diff --git a/asmjit b/asmjit
index 48da90ded7..9001d2f2b7 160000
--- a/asmjit
+++ b/asmjit
@@ -1 +1 @@
-Subproject commit 48da90ded775fa2ba0fd3f15522890ad631ad6de
+Subproject commit 9001d2f2b77eec93ce79facb1ef6d11b96dc612f
diff --git a/rpcs3/Emu/SysCalls/Modules/cellFs.cpp b/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
index daadb68b59..223ce6cfcb 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellFs.cpp
@@ -477,6 +477,11 @@ s32 cellFsStReadStart(u32 fd, u64 offset, u64 size)
 		return CELL_FS_EBADF;
 	}
 
+	if (size > std::numeric_limits<u32>::max()) // ???
+	{
+		return CELL_FS_EINVAL;
+	}
+
 	switch (auto status = file->st_status.compare_and_swap(SSS_INITIALIZED, SSS_STARTED))
 	{
 	case SSS_NOT_INITIALIZED:
@@ -590,6 +595,11 @@ s32 cellFsStRead(u32 fd, vm::ptr<u8> buf, u64 size, vm::ptr<u64> rsize)
 		return CELL_FS_EBADF;
 	}
 
+	if (size > std::numeric_limits<u32>::max()) // ???
+	{
+		return CELL_FS_EINVAL;
+	}
+
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED || file->st_copyless)
 	{
 		return CELL_FS_ENXIO;
@@ -657,6 +667,11 @@ s32 cellFsStReadPutCurrentAddr(u32 fd, vm::ptr<u8> addr, u64 size)
 		return CELL_FS_EBADF;
 	}
 
+	if (size > std::numeric_limits<u32>::max()) // ???
+	{
+		return CELL_FS_EINVAL;
+	}
+
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED || !file->st_copyless)
 	{
 		return CELL_FS_ENXIO;
@@ -684,6 +699,11 @@ s32 cellFsStReadWait(u32 fd, u64 size)
 		return CELL_FS_EBADF;
 	}
 
+	if (size > std::numeric_limits<u32>::max()) // ???
+	{
+		return CELL_FS_EINVAL;
+	}
+
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED)
 	{
 		return CELL_FS_ENXIO;
@@ -718,12 +738,17 @@ s32 cellFsStReadWaitCallback(u32 fd, u64 size, fs_st_cb_t func)
 		return CELL_FS_EBADF;
 	}
 
+	if (size > std::numeric_limits<u32>::max()) // ???
+	{
+		return CELL_FS_EINVAL;
+	}
+
 	if (file->st_status.read_sync() == SSS_NOT_INITIALIZED)
 	{
 		return CELL_FS_ENXIO;
 	}
 
-	if (!file->st_callback.compare_and_swap_test({}, { size, func }))
+	if (!file->st_callback.compare_and_swap_test({}, { static_cast<u32>(size), func }))
 	{
 		return CELL_FS_EIO;
 	}