Eight bytes into the Binary JSON header there's a 32-bit little-endian
size, which qJsonFromRawLibraryMetaData uses to determine the size of
the stored metadata. That value is passed as a size to QByteArray, which
means certain values could cause crashes due to being too big or via
sign-extension in 64-bit.
[ChangeLog][QtCore][QPluginLoader] Fixed an issue that could cause a
crash when certain damaged or corrupt plugin files were scanned.
Change-Id: I117816bf0f5e469b8d34fffd153dc5425cec39a7
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Thiago Macieira