libyang: heap-buffer-overflow in lyd_lyb_data_length

With the following auto-generated fuzz target: include "/src/libyang/src/treedata.h" include include int LLVMFuzzerTestOneInputconst uint8t data, sizet size if !size return 0; const char dataptr = const char data; // Ensure the data is null-terminated. char nullterminateddata = mallocsize + 1; if...