r7 = ioctl$LOOP_CTL_GET_FREE(r0, 0x4c82)
ioctl$LOOP_CTL_ADD(r6, 0x4c80, r7)
sendfile(r4, r5, 0x0, 0xffe3)
ioctl$LOOP_CTL_GET_FREE(r5, 0x4c82)
ioctl$LOOP_CTL_REMOVE(r2, 0x4c81, r3)
BUG: leak checking failed